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• 1. [Article] A historical reconstruction and land use history of six tidal wetlands in Oregon

  Citation × Citation Citation Abstract Copy Title: A historical reconstruction and land use history of six tidal wetlands in Oregon Author: Hennessey, Jennifer Taylor Title: A historical reconstruction and land use history of six tidal wetlands in Oregon Author: Hennessey, Jennifer Taylor Close

• 2. [Article] A land use history of Benton County, Oregon

  Citation × Citation Citation Abstract Copy Title: A land use history of Benton County, Oregon Author: Longwood, Franklin Russell Title: A land use history of Benton County, Oregon Author: Longwood, Franklin Russell Close

• 3. [Article] Warming and earlier spring increase western U.S. forest wildfire activity

  Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes ...

  Citation × Citation Citation Abstract Copy Title: Warming and earlier spring increase western U.S. forest wildfire activity Author: Swetnam, T.W., Cayan, D.R., Westerling, A.L., Hidalgo, H.G. Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes in wildfire has been systematically documented. Much of the public and scientific discussion of changes in western United States wildfire has focused instead on the effects of 19thand 20th-century land-use history. We compiled a comprehensive database of large wildfires in western United States forests since 1970 and compared it with hydroclimatic and land-surface data. Here, we show that large wildfire activity increased suddenly and markedly in the mid-1980s, with higher large-wildfire frequency, longer wildfire durations, and longer wildfire seasons. The greatest increases occurred in mid-elevation, Northern Rockies forests, where land-use histories have relatively little effect on fire risks and are strongly associated with increased spring and summer temperatures and an earlier spring snowmelt. Title: Warming and earlier spring increase western U.S. forest wildfire activity Author: Swetnam, T.W., Cayan, D.R., Westerling, A.L., Hidalgo, H.G. Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes in wildfire has been systematically documented. Much of the public and scientific discussion of changes in western United States wildfire has focused instead on the effects of 19thand 20th-century land-use history. We compiled a comprehensive database of large wildfires in western United States forests since 1970 and compared it with hydroclimatic and land-surface data. Here, we show that large wildfire activity increased suddenly and markedly in the mid-1980s, with higher large-wildfire frequency, longer wildfire durations, and longer wildfire seasons. The greatest increases occurred in mid-elevation, Northern Rockies forests, where land-use histories have relatively little effect on fire risks and are strongly associated with increased spring and summer temperatures and an earlier spring snowmelt. Close

• 4. [Article] Warming and earlier spring increase western U.S. forest wildfire activity

  Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes ...

  Citation × Citation Citation Abstract Copy Title: Warming and earlier spring increase western U.S. forest wildfire activity Author: Cayan, D. R., Westerling, A. L., Swetnam, T. W., Hidalgo, H. G. Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes in wildfire has been systematically documented. Much of the public and scientific discussion of changes in western United States wildfire has focused instead on the effects of 19th- and 20th-century land-use history. We compiled a comprehensive database of large wildfires in western United States forests since 1970 and compared it with hydroclimatic and land-surface data. Here, we show that large wildfire activity increased suddenly and markedly in the mid-1980s, with higher large-wildfire frequency, longer wildfire durations, and longer wildfire seasons. The greatest increases occurred in mid-elevation, Northern Rockies forests, where land-use histories have relatively little effect on fire risks and are strongly associated with increased spring and summer temperatures and an earlier spring snowmelt. Title: Warming and earlier spring increase western U.S. forest wildfire activity Author: Cayan, D. R., Westerling, A. L., Swetnam, T. W., Hidalgo, H. G. Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes in wildfire has been systematically documented. Much of the public and scientific discussion of changes in western United States wildfire has focused instead on the effects of 19th- and 20th-century land-use history. We compiled a comprehensive database of large wildfires in western United States forests since 1970 and compared it with hydroclimatic and land-surface data. Here, we show that large wildfire activity increased suddenly and markedly in the mid-1980s, with higher large-wildfire frequency, longer wildfire durations, and longer wildfire seasons. The greatest increases occurred in mid-elevation, Northern Rockies forests, where land-use histories have relatively little effect on fire risks and are strongly associated with increased spring and summer temperatures and an earlier spring snowmelt. Close

• 5. [Article] Historical changes in stream habitats in the Columbia River basin

  Knowledge of how stream habitats change over time in natural and human-influenced ecosystems at large, regional scales is currently limited. A historical stream survey (1934-1945) was compared to current ...

  Citation × Citation Citation Abstract Copy Title: Historical changes in stream habitats in the Columbia River basin Author: McIntosh, Bruce A. Knowledge of how stream habitats change over time in natural and human-influenced ecosystems at large, regional scales is currently limited. A historical stream survey (1934-1945) was compared to current surveys to assess changes in poo1 habitats in the Columbia River basin. Streams from across the basin, representing a wide range of geologies, stream sizes and land-use histories, were used to evaluate habitat change. We classified streams as managed or unmanaged, based on their land-use histories. Managed basins were watersheds managed predominantly for multiple-use (e.g., timber harvest, livestock grazing) and unmanaged basins were minimally affected by human disturbance (e.g., wilderness/roadless areas). The quantity and quality of pool habitats increased or remained the same in unmanaged streams, and decreased in managed streams since the 1930s. Despite differences in stream size and land-use history, the magnitude and direction of theses changes were consistent. In addition, the decrease in pool habitats did not differ between public and private lands. Ecoregions were used to assess regional patterns to these changes. Our analysis showed that pool habitats decreased in all Ecoregions except the North Cascades Ecoregion. Regional land-use histories were documented for the study streams. The overgrazing of most rangelands had been documented by 1900. Grazing practices began to change after 1930, but current information suggests that while uplands have improved, riparian areas have not. By World War II, stream habitats had been affected by the loss of riparian vegetation, large woody debris, and aquatic habitats due to splash dams, log drives, and riparian timber harvest. Timber harvest expanded to the uplands after World War II, as the demand for timber expanded. Rapidly developing road networks increased runoff and sedimentation, which continued the impact of timber harvest on already damaged stream ecosystems. Almost 90% of managed streams had roads along the channel or within the floodplain. "Stream improvements," such as channelization and stream cleaning, also affected stream ecosystems. We concluded that the chronic and persistent effects of land-use practices had simplified stream channels and reduced habitat complexity in most managed watersheds in the Columbia River basin. Title: Historical changes in stream habitats in the Columbia River basin Author: McIntosh, Bruce A. Knowledge of how stream habitats change over time in natural and human-influenced ecosystems at large, regional scales is currently limited. A historical stream survey (1934-1945) was compared to current surveys to assess changes in poo1 habitats in the Columbia River basin. Streams from across the basin, representing a wide range of geologies, stream sizes and land-use histories, were used to evaluate habitat change. We classified streams as managed or unmanaged, based on their land-use histories. Managed basins were watersheds managed predominantly for multiple-use (e.g., timber harvest, livestock grazing) and unmanaged basins were minimally affected by human disturbance (e.g., wilderness/roadless areas). The quantity and quality of pool habitats increased or remained the same in unmanaged streams, and decreased in managed streams since the 1930s. Despite differences in stream size and land-use history, the magnitude and direction of theses changes were consistent. In addition, the decrease in pool habitats did not differ between public and private lands. Ecoregions were used to assess regional patterns to these changes. Our analysis showed that pool habitats decreased in all Ecoregions except the North Cascades Ecoregion. Regional land-use histories were documented for the study streams. The overgrazing of most rangelands had been documented by 1900. Grazing practices began to change after 1930, but current information suggests that while uplands have improved, riparian areas have not. By World War II, stream habitats had been affected by the loss of riparian vegetation, large woody debris, and aquatic habitats due to splash dams, log drives, and riparian timber harvest. Timber harvest expanded to the uplands after World War II, as the demand for timber expanded. Rapidly developing road networks increased runoff and sedimentation, which continued the impact of timber harvest on already damaged stream ecosystems. Almost 90% of managed streams had roads along the channel or within the floodplain. "Stream improvements," such as channelization and stream cleaning, also affected stream ecosystems. We concluded that the chronic and persistent effects of land-use practices had simplified stream channels and reduced habitat complexity in most managed watersheds in the Columbia River basin. Close

• 6. [Article] Mason’s Run brook trout (Salvelinus fontinalis): history, management challenges, and recommendations

  Graduation date: 2016

  Citation × Citation Citation Abstract Copy Title: Mason’s Run brook trout (Salvelinus fontinalis): history, management challenges, and recommendations Author: Russell, Joseph D. III Graduation date: 2016 Title: Mason’s Run brook trout (Salvelinus fontinalis): history, management challenges, and recommendations Author: Russell, Joseph D. III Graduation date: 2016 Close

• 7. [Article] Effects of deforestation and land use on biomass, carbon, and nutrient pools in the Los Tuxtlas Region, Mexico

  Land-use change in forested regions of the tropics is currently one of the largest anthropogenic perturbations on earth; it is a force capable of altering biogeochemical cycles at local, regional, and ...

  Citation × Citation Citation Abstract Copy Title: Effects of deforestation and land use on biomass, carbon, and nutrient pools in the Los Tuxtlas Region, Mexico Author: Hughes, R. Flint Land-use change in forested regions of the tropics is currently one of the largest anthropogenic perturbations on earth; it is a force capable of altering biogeochemical cycles at local, regional, and global scales. However, significant uncertainties exist concerning the impact of land-use change on biomass and elemental pools of tropical forests. To evaluate the response of biomass and elemental pools to deforestation and land-use in the Los Tuxtlas Region, Mexico, total aboveground biomass (TAGB), C, N, S, and P pools were quantified along a land-use gradient that included primary forests, pastures, cornfields, and secondary forests. TAGB of primary forests averaged 403 Mg/ha; pastures and cornfields averaged 24 and 23 Mg/ha, respectively. Conversion of primary forests to pastures or cornfields resulted in declines of 94% of aboveground C pools, 92% of aboveground N, 83% of aboveground P, and between 89% and 95% of aboveground S. Soil pools of C, N, and S did not differ significantly between primary forests, pastures, and cornfields. Soil C to a 1 m depth ranged from 166-210 Mg/ha; N and S ranged from 16,O00-2O,000 kg/ha and 340O-38OO kg/ha, respectively. In secondary forests, TAGB increased with increasing forest age; accumulations ranged from 4.8 Mg/ha in a 6-month- old site to 287 Mg/ha in a 50-year-old site. Results indicate that secondary forests will attain the equivalent of primary forest TAGB in 73 years. However, rates of TAGB accumulation were constrained by land-use history; rates decreased with increasing duration of land use prior to abandonment. Soil pools of secondary forests were not correlated to forest age or prior land-use history and did not differ significantly from soil pools of primary forests, pastures, or cornfields. As a group, soils of primary and old secondary forest sites had significantly larger pools of available N and higher rates of nitrification and N mineralization than the combined group of pastures, cornfields, and recently abandoned sites. Currently, the Los Tuxtias Region functions as a net source of greenhouse gases. Regenerating secondary forests have the capacity to counterbalance emissions resulting from deforestation, but presently constitute only a small percentage of the the regional landscape. Title: Effects of deforestation and land use on biomass, carbon, and nutrient pools in the Los Tuxtlas Region, Mexico Author: Hughes, R. Flint Land-use change in forested regions of the tropics is currently one of the largest anthropogenic perturbations on earth; it is a force capable of altering biogeochemical cycles at local, regional, and global scales. However, significant uncertainties exist concerning the impact of land-use change on biomass and elemental pools of tropical forests. To evaluate the response of biomass and elemental pools to deforestation and land-use in the Los Tuxtlas Region, Mexico, total aboveground biomass (TAGB), C, N, S, and P pools were quantified along a land-use gradient that included primary forests, pastures, cornfields, and secondary forests. TAGB of primary forests averaged 403 Mg/ha; pastures and cornfields averaged 24 and 23 Mg/ha, respectively. Conversion of primary forests to pastures or cornfields resulted in declines of 94% of aboveground C pools, 92% of aboveground N, 83% of aboveground P, and between 89% and 95% of aboveground S. Soil pools of C, N, and S did not differ significantly between primary forests, pastures, and cornfields. Soil C to a 1 m depth ranged from 166-210 Mg/ha; N and S ranged from 16,O00-2O,000 kg/ha and 340O-38OO kg/ha, respectively. In secondary forests, TAGB increased with increasing forest age; accumulations ranged from 4.8 Mg/ha in a 6-month- old site to 287 Mg/ha in a 50-year-old site. Results indicate that secondary forests will attain the equivalent of primary forest TAGB in 73 years. However, rates of TAGB accumulation were constrained by land-use history; rates decreased with increasing duration of land use prior to abandonment. Soil pools of secondary forests were not correlated to forest age or prior land-use history and did not differ significantly from soil pools of primary forests, pastures, or cornfields. As a group, soils of primary and old secondary forest sites had significantly larger pools of available N and higher rates of nitrification and N mineralization than the combined group of pastures, cornfields, and recently abandoned sites. Currently, the Los Tuxtias Region functions as a net source of greenhouse gases. Regenerating secondary forests have the capacity to counterbalance emissions resulting from deforestation, but presently constitute only a small percentage of the the regional landscape. Close

• 8. [Article] Oregon Explorer : Natural resources information for current and future decision-makers

  Oregon Explorer (www.oregonexplorer.info), a natural resources digital library developed by Oregon State University Libraries and the Institute for Natural Resources, was created for Oregon’s natural resource ...

  Citation × Citation Citation Abstract Copy Title: Oregon Explorer : Natural resources information for current and future decision-makers Author: Salwasser, Janine, Wirth, Andrea A. Oregon Explorer (www.oregonexplorer.info), a natural resources digital library developed by Oregon State University Libraries and the Institute for Natural Resources, was created for Oregon’s natural resource decision-makers to promote informed and streamlined public and private decision-making. Examples of projects and successes of the Oregon Explorer include a basin portal for the Umpqua River, developed in conjunction with the Partnership for Umpqua Rivers, as well as topic portals, such as the Land Use Explorer launched in October 2007 to inform Oregonians about land use history and current issues. We have learned that in the natural resources arena, user needs change with different geographies, yet the adaptations made at the local level are useful in expanding the content and services delivered at the statewide level. It is not enough to just provide access to data or documents. Users want access to a wide variety of integrated information resources—digital documents, interactive maps and reports, decision support, high resolution imagery, and access to available expertise. With Oregon Explorer becoming established as a tool for decision-makers and citizens, members of the team are exploring opportunities to use the digital library in classroom settings. Students in Oregon’s K-12 schools and OSU’s undergraduates are groups that we feel could benefit from the natural resources information and tools available. Proposals are being developed to extend Oregon Explorer’s capabilities for use in primary and secondary education. Oregon Explorer is being used in several university classrooms and will become more integrated as the content and tools grow and as strategies for further incorporation are developed. This evolving natural resources digital library will enable current and future decision-makers to learn about Oregon's environment and to actively engage in creating and sharing knowledge before decisions are made. Title: Oregon Explorer : Natural resources information for current and future decision-makers Author: Salwasser, Janine, Wirth, Andrea A. Oregon Explorer (www.oregonexplorer.info), a natural resources digital library developed by Oregon State University Libraries and the Institute for Natural Resources, was created for Oregon’s natural resource decision-makers to promote informed and streamlined public and private decision-making. Examples of projects and successes of the Oregon Explorer include a basin portal for the Umpqua River, developed in conjunction with the Partnership for Umpqua Rivers, as well as topic portals, such as the Land Use Explorer launched in October 2007 to inform Oregonians about land use history and current issues. We have learned that in the natural resources arena, user needs change with different geographies, yet the adaptations made at the local level are useful in expanding the content and services delivered at the statewide level. It is not enough to just provide access to data or documents. Users want access to a wide variety of integrated information resources—digital documents, interactive maps and reports, decision support, high resolution imagery, and access to available expertise. With Oregon Explorer becoming established as a tool for decision-makers and citizens, members of the team are exploring opportunities to use the digital library in classroom settings. Students in Oregon’s K-12 schools and OSU’s undergraduates are groups that we feel could benefit from the natural resources information and tools available. Proposals are being developed to extend Oregon Explorer’s capabilities for use in primary and secondary education. Oregon Explorer is being used in several university classrooms and will become more integrated as the content and tools grow and as strategies for further incorporation are developed. This evolving natural resources digital library will enable current and future decision-makers to learn about Oregon's environment and to actively engage in creating and sharing knowledge before decisions are made. Close

• 9. [Article] Mesoscale Variation in Snag and Hardwood Densities and Sizes in Old-Growth Forests in Western Oregon

  To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Society ...

  Citation × Citation Citation Abstract Copy Title: Mesoscale Variation in Snag and Hardwood Densities and Sizes in Old-Growth Forests in Western Oregon Author: Bright, Cheryl, Puettmann, Klaus, Ares, Adrian To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Society of American Foresters and can be found at: http://www.safnet.org/. Title: Mesoscale Variation in Snag and Hardwood Densities and Sizes in Old-Growth Forests in Western Oregon Author: Bright, Cheryl, Puettmann, Klaus, Ares, Adrian To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Society of American Foresters and can be found at: http://www.safnet.org/. Close

• 10. [Article] Hydrologic and Land Cover Effects on Sources and Fate of In-Stream Fluorescent Dissolved Organic Matter

  Dissolved organic matter (DOM) is a critical component of the carbon cycle linking terrestrial and aquatic ecosystems. Although many factors influence DOM fluxes and quality in rivers, controls on DOM ...

  Citation × Citation Citation Abstract Copy Title: Hydrologic and Land Cover Effects on Sources and Fate of In-Stream Fluorescent Dissolved Organic Matter Author: Lee, Baek Soo P. Dissolved organic matter (DOM) is a critical component of the carbon cycle linking terrestrial and aquatic ecosystems. Although many factors influence DOM fluxes and quality in rivers, controls on DOM compositions in catchments of the western U.S. are poorly understood. UV and fluorescent spectroscopy is a simpler, faster, and less expensive DOM fingerprinting technique compared to techniques, such as nuclear magnetic resonance (NMR) spectroscopy or wet chemical fractionation, and could be useful for characterizing complex DOM chemistry. However, only 1 % of DOM is estimated to be fluorescent, and the utility of UV and fluorescent spectroscopy for DOM characterization needs to be further investigated. This dissertation applied UV and fluorescent spectroscopy to examine hydrologic and land cover controls on DOM chemistry in streams of 45 catchments in the forested headwaters and a mixed landscape of the Willamette River Basin, Oregon, based on two years of monitoring. This dissertation contributes three major findings. First, freezing of water alters DOM chemistry by preferentially precipitating aromatic DOM. Second, UV and fluorescent spectroscopy was able to discriminate DOM delivered from highly processed, proteinrich deep subsurface sources during dry seasons especially in forested headwater streams of the H. J. Andrews Experimental Forest (HJA), where nitrogen inputs are very low. In addition, fluorescent DOM chemistry differed among watersheds with varying forest management history. Third, although fluorescent DOM in a headwater forested system differed among land use history, fluorescent DOM composition did not vary among streams draining a well-mixed landscape of urban, pasture/hay, forest, and agricultural land cover types in the central Willamette River Basin, where nitrogen inputs to streams are relatively high. Dissolved organic carbon (DOC) concentration decreased and the fluorescent index indicated an increase in terrestrial sources of DOM from small (1st and 2nd order) to large (4th to 6th order) streams. A protein-like DOM component that was detected in the headwater forested study site (HJA) was not detected in stream samples from the middle basin study site. These findings indicate that in-stream respiration, fueled by nutrient additions from agriculture runoff, consumes bioavailable, labile DOM (proteins) preferentially relative to more recalcitrant, terrestrial sources of DOM along water flow paths from headwater streams to major rivers. This study shows the clear applicability of the fluorescent characterization of DOM in identifying hydrologic and landscape controls as well as varying DOM chemistry and functions throughout watershed ecosystems. Title: Hydrologic and Land Cover Effects on Sources and Fate of In-Stream Fluorescent Dissolved Organic Matter Author: Lee, Baek Soo P. Dissolved organic matter (DOM) is a critical component of the carbon cycle linking terrestrial and aquatic ecosystems. Although many factors influence DOM fluxes and quality in rivers, controls on DOM compositions in catchments of the western U.S. are poorly understood. UV and fluorescent spectroscopy is a simpler, faster, and less expensive DOM fingerprinting technique compared to techniques, such as nuclear magnetic resonance (NMR) spectroscopy or wet chemical fractionation, and could be useful for characterizing complex DOM chemistry. However, only 1 % of DOM is estimated to be fluorescent, and the utility of UV and fluorescent spectroscopy for DOM characterization needs to be further investigated. This dissertation applied UV and fluorescent spectroscopy to examine hydrologic and land cover controls on DOM chemistry in streams of 45 catchments in the forested headwaters and a mixed landscape of the Willamette River Basin, Oregon, based on two years of monitoring. This dissertation contributes three major findings. First, freezing of water alters DOM chemistry by preferentially precipitating aromatic DOM. Second, UV and fluorescent spectroscopy was able to discriminate DOM delivered from highly processed, proteinrich deep subsurface sources during dry seasons especially in forested headwater streams of the H. J. Andrews Experimental Forest (HJA), where nitrogen inputs are very low. In addition, fluorescent DOM chemistry differed among watersheds with varying forest management history. Third, although fluorescent DOM in a headwater forested system differed among land use history, fluorescent DOM composition did not vary among streams draining a well-mixed landscape of urban, pasture/hay, forest, and agricultural land cover types in the central Willamette River Basin, where nitrogen inputs to streams are relatively high. Dissolved organic carbon (DOC) concentration decreased and the fluorescent index indicated an increase in terrestrial sources of DOM from small (1st and 2nd order) to large (4th to 6th order) streams. A protein-like DOM component that was detected in the headwater forested study site (HJA) was not detected in stream samples from the middle basin study site. These findings indicate that in-stream respiration, fueled by nutrient additions from agriculture runoff, consumes bioavailable, labile DOM (proteins) preferentially relative to more recalcitrant, terrestrial sources of DOM along water flow paths from headwater streams to major rivers. This study shows the clear applicability of the fluorescent characterization of DOM in identifying hydrologic and landscape controls as well as varying DOM chemistry and functions throughout watershed ecosystems. Close

• 11. [Article] Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability

  The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes ...

  Citation × Citation Citation Abstract Copy Title: Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability Author: Chaer, Guilherme M. The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to evaluate differences in the stability of soil enzymes (laccase, cellulase and fluorescein diacetate hydrolysis) and microbial community composition as determined by phospholipid fatty acid (PLFA) analysis. The conversion of land use from forest to agriculture resulted in a new microbial community that was less functionally stable. Loss of stability was indicated by the reduced resilience of laccase and cellulase activities in the agricultural soil, which suggested a less diverse community of microorganisms capable of producing these enzymes. The second study examined changes in microbial community composition and diversity that occurred across a gradient of soil disturbance. Disturbances were simulated by tillage events applied at different intensities to a 12-year-old fallow area. These treatments caused degradation of several soil physico-chemical properties, and alterations in microbial structure based on PLFA and terminal restriction fragment length polymorphism (T-RFLP) analyses, and in metabolic potential based on community level physiological profiles (CLPPs). Multivariate ordination of soil properties revealed the formation of a linear gradient of soil degradation that was significantly correlated with CLPPs, but not with T-RFLP and PLFA profiles. Nevertheless, changes observed in microbial community structure were significantly associated with decreases in soil organic C and field hydraulic conductivity. The third study demonstrated that undisturbed forest soils from western Oregon express an equilibrium between soil organic matter and biochemical properties. A model fitted through multiple regression analysis showed that phosphatase activity and microbial biomass were able to explain 97% of the soil organic C in these soils. This equilibrium was disrupted when a soil from an old-growth site was submitted to chemical stresses (Cu addition or pH alteration) and physical disturbances (wet-dry or freeze-thaw cycles). The magnitude of this disruption was consistently expressed by the ratio between soil C predicted by the model (Cp), and soil C that was measured (Cm). This ratio is proposed as biochemically-based index of soil quality. Title: Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability Author: Chaer, Guilherme M. The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to evaluate differences in the stability of soil enzymes (laccase, cellulase and fluorescein diacetate hydrolysis) and microbial community composition as determined by phospholipid fatty acid (PLFA) analysis. The conversion of land use from forest to agriculture resulted in a new microbial community that was less functionally stable. Loss of stability was indicated by the reduced resilience of laccase and cellulase activities in the agricultural soil, which suggested a less diverse community of microorganisms capable of producing these enzymes. The second study examined changes in microbial community composition and diversity that occurred across a gradient of soil disturbance. Disturbances were simulated by tillage events applied at different intensities to a 12-year-old fallow area. These treatments caused degradation of several soil physico-chemical properties, and alterations in microbial structure based on PLFA and terminal restriction fragment length polymorphism (T-RFLP) analyses, and in metabolic potential based on community level physiological profiles (CLPPs). Multivariate ordination of soil properties revealed the formation of a linear gradient of soil degradation that was significantly correlated with CLPPs, but not with T-RFLP and PLFA profiles. Nevertheless, changes observed in microbial community structure were significantly associated with decreases in soil organic C and field hydraulic conductivity. The third study demonstrated that undisturbed forest soils from western Oregon express an equilibrium between soil organic matter and biochemical properties. A model fitted through multiple regression analysis showed that phosphatase activity and microbial biomass were able to explain 97% of the soil organic C in these soils. This equilibrium was disrupted when a soil from an old-growth site was submitted to chemical stresses (Cu addition or pH alteration) and physical disturbances (wet-dry or freeze-thaw cycles). The magnitude of this disruption was consistently expressed by the ratio between soil C predicted by the model (Cp), and soil C that was measured (Cm). This ratio is proposed as biochemically-based index of soil quality. Close

• 12. [Article] Environmental variables as predictors of fish assemblages in the Tillamook Basin, Oregon

  The Tillamook and Kilchis subbasins of the Tillamook Bay watershed (Oregon Coast Range) have differences in geology and land use history and, therefore, varied environmental conditions that could affect ...

  Citation × Citation Citation Abstract Copy Title: Environmental variables as predictors of fish assemblages in the Tillamook Basin, Oregon Author: Rose, Cathleen E. The Tillamook and Kilchis subbasins of the Tillamook Bay watershed (Oregon Coast Range) have differences in geology and land use history and, therefore, varied environmental conditions that could affect fish assemblages. Fifty-two randomly selected wadeable stream reaches in these two subbasins were surveyed for stream habitat and fish assemblage composition during two summer field seasons. Data collected were used to identify environmental variables most associated with fish assemblages, determine major predictors of fish species relative abundance, and test for any differences in fish assemblages between the Tillamook and Kilchis subbasins and among three stream orders. Eleven fish species were encountered, including four salmonid species (Oncorhynchus spp.) and five species of sculpin (Cottus spp.). For three sites visited twice in both field seasons, variability in fish assemblages and environmental measurements between sample years and between early and late-summer visits to sites was low. Fish assemblages differed between the two subbasins. The assemblages in the Kilchis subbasin contained higher proportions of trout species, while the Tillamook subbasin assemblages contained higher proportions of sculpin species. A breakdown of fish assemblages by stream order showed that different fish species dominated the assemblages in different sized streams. With data from both subbasins combined, trout species composed a smaller proportion of the fish assemblages in larger streams, and sculpin species composition also varied with stream order. Results from non-metric multidimensional scaling ordinations indicated that substrate type, stream gradient, and variables related to stream size were the most highly correlated to fish species relative abundances. Multiple linear regression was used to assess the usefulness of an uncorrelated subset of the environmental variables as predictors of relative abundance of the six most common fish species. The environmental variables were good predictors of relative abundance for some species, but were less successful in predicting abundances of entirely anadromous species. These results provide valuable insight into fish-habitat relationships using a fish assemblage perspective and incorporating species, such as sculpins, for which there is little existing information. There has been recent interest in quantifying the effects of human land use on stream fish, and these data can be used in future studies to explore potential links between important environmental variables and land use practices. Title: Environmental variables as predictors of fish assemblages in the Tillamook Basin, Oregon Author: Rose, Cathleen E. The Tillamook and Kilchis subbasins of the Tillamook Bay watershed (Oregon Coast Range) have differences in geology and land use history and, therefore, varied environmental conditions that could affect fish assemblages. Fifty-two randomly selected wadeable stream reaches in these two subbasins were surveyed for stream habitat and fish assemblage composition during two summer field seasons. Data collected were used to identify environmental variables most associated with fish assemblages, determine major predictors of fish species relative abundance, and test for any differences in fish assemblages between the Tillamook and Kilchis subbasins and among three stream orders. Eleven fish species were encountered, including four salmonid species (Oncorhynchus spp.) and five species of sculpin (Cottus spp.). For three sites visited twice in both field seasons, variability in fish assemblages and environmental measurements between sample years and between early and late-summer visits to sites was low. Fish assemblages differed between the two subbasins. The assemblages in the Kilchis subbasin contained higher proportions of trout species, while the Tillamook subbasin assemblages contained higher proportions of sculpin species. A breakdown of fish assemblages by stream order showed that different fish species dominated the assemblages in different sized streams. With data from both subbasins combined, trout species composed a smaller proportion of the fish assemblages in larger streams, and sculpin species composition also varied with stream order. Results from non-metric multidimensional scaling ordinations indicated that substrate type, stream gradient, and variables related to stream size were the most highly correlated to fish species relative abundances. Multiple linear regression was used to assess the usefulness of an uncorrelated subset of the environmental variables as predictors of relative abundance of the six most common fish species. The environmental variables were good predictors of relative abundance for some species, but were less successful in predicting abundances of entirely anadromous species. These results provide valuable insight into fish-habitat relationships using a fish assemblage perspective and incorporating species, such as sculpins, for which there is little existing information. There has been recent interest in quantifying the effects of human land use on stream fish, and these data can be used in future studies to explore potential links between important environmental variables and land use practices. Close

• 13. [Article] Seed and establishment limitation contribute to long-term native forb declines in California grasslands

  This is the publisher’s final pdf. The published article is copyrighted by Ecological Society of America and can be found at: http://www.esa.org/.

  Citation × Citation Citation Abstract Copy Title: Seed and establishment limitation contribute to long-term native forb declines in California grasslands Author: Brandt, Angela J., Seabloom, Eric W. This is the publisher’s final pdf. The published article is copyrighted by Ecological Society of America and can be found at: http://www.esa.org/. Title: Seed and establishment limitation contribute to long-term native forb declines in California grasslands Author: Brandt, Angela J., Seabloom, Eric W. This is the publisher’s final pdf. The published article is copyrighted by Ecological Society of America and can be found at: http://www.esa.org/. Close

• 14. [Article] Trends in cation, nitrogen, sulfate and hydrogen ion concentrations in precipitation in the United States and Europe from 1978 to 2010: a new look at an old problem

  This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/10533.

  Citation × Citation Citation Abstract Copy Title: Trends in cation, nitrogen, sulfate and hydrogen ion concentrations in precipitation in the United States and Europe from 1978 to 2010: a new look at an old problem Author: Lajtha, Kate, Jones, Julia This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/10533. Title: Trends in cation, nitrogen, sulfate and hydrogen ion concentrations in precipitation in the United States and Europe from 1978 to 2010: a new look at an old problem Author: Lajtha, Kate, Jones, Julia This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/10533. Close

• 15. [Article] The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands

  Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding ...

  Citation × Citation Citation Abstract Copy Title: The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands Author: Brandt, Angela J. Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding the mechanisms by which invaders might coexist with native species or exclude them from the community, thus informing management practices to maximize their effectiveness at conserving native biodiversity. Differences in functional or phylogenetic similarity of invaders to native residents can affect invasion success and the probability they will coexist with natives. For example, functionally dissimilar species may not compete strongly and distantly related species may share fewer natural enemies. Furthermore, environmental heterogeneity can promote species coexistence by providing the opportunity for a greater number of coexistence mechanisms to operate, thereby mitigating the potential for species invasions to lead to native extinction. My thesis examines how provenance (i.e., native origin) and phylogenetic relatedness of plant species affect community dynamics and species interactions in the invaded California grasslands. To do this I have assembled two unique community data sets, one spanning 48 years across a 1000-ha site and one spanning 7 years along a 500-km latitudinal transect. I show that native and exotic species abundance and diversity is highly variable in both time and space, but these provenance group responses are rarely negatively correlated (Chapter 2). Thus, exotic species do not generally appear to exclude natives from communities. Long-term abundance patterns further suggest that the system remains in a state of transience, and populations of several native species are declining at local scales (Chapter 3). Recruitment limitation due to the build-up of plant litter associated with exotic grasses may be generally responsible for these declines, but habitat suitability, land-use history, and community composition also affect native recruitment. Across the grasslands, disturbance and resource supply can interact to affect both species and phylogenetic diversity (Chapter 4). Disturbance in particular can increase diversity, likely by increasing opportunities for colonization by removing plant litter that previously limited recruitment. Both phylogeny and provenance can also affect biotic interactions, such as with communities of soil organisms (Chapter 5). Thus, I have shown that spatio-temporal heterogeneity, alterations to the biotic environment mediated by exotic invasion, and phylogenetic relationships among species are all important considerations when evaluating impacts of invasion and designing management strategies to conserve native biodiversity, especially in light of anthropogenic influence on disturbance regimes and resource supply. Title: The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands Author: Brandt, Angela J. Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding the mechanisms by which invaders might coexist with native species or exclude them from the community, thus informing management practices to maximize their effectiveness at conserving native biodiversity. Differences in functional or phylogenetic similarity of invaders to native residents can affect invasion success and the probability they will coexist with natives. For example, functionally dissimilar species may not compete strongly and distantly related species may share fewer natural enemies. Furthermore, environmental heterogeneity can promote species coexistence by providing the opportunity for a greater number of coexistence mechanisms to operate, thereby mitigating the potential for species invasions to lead to native extinction. My thesis examines how provenance (i.e., native origin) and phylogenetic relatedness of plant species affect community dynamics and species interactions in the invaded California grasslands. To do this I have assembled two unique community data sets, one spanning 48 years across a 1000-ha site and one spanning 7 years along a 500-km latitudinal transect. I show that native and exotic species abundance and diversity is highly variable in both time and space, but these provenance group responses are rarely negatively correlated (Chapter 2). Thus, exotic species do not generally appear to exclude natives from communities. Long-term abundance patterns further suggest that the system remains in a state of transience, and populations of several native species are declining at local scales (Chapter 3). Recruitment limitation due to the build-up of plant litter associated with exotic grasses may be generally responsible for these declines, but habitat suitability, land-use history, and community composition also affect native recruitment. Across the grasslands, disturbance and resource supply can interact to affect both species and phylogenetic diversity (Chapter 4). Disturbance in particular can increase diversity, likely by increasing opportunities for colonization by removing plant litter that previously limited recruitment. Both phylogeny and provenance can also affect biotic interactions, such as with communities of soil organisms (Chapter 5). Thus, I have shown that spatio-temporal heterogeneity, alterations to the biotic environment mediated by exotic invasion, and phylogenetic relationships among species are all important considerations when evaluating impacts of invasion and designing management strategies to conserve native biodiversity, especially in light of anthropogenic influence on disturbance regimes and resource supply. Close

• 16. [Article] Meadow classification in the Willamette National Forest and conifer encroachment patterns in the Chucksney-Grasshopper meadow complex, Western Cascade Range, Oregon

  This study delineates and characterizes the distribution of montane meadows in the Willamette National Forest, identifies encroachment patterns in relation to topographic features and proximity to trees ...

  Citation × Citation Citation Abstract Copy Title: Meadow classification in the Willamette National Forest and conifer encroachment patterns in the Chucksney-Grasshopper meadow complex, Western Cascade Range, Oregon Author: Dailey, Michele Meadows This study delineates and characterizes the distribution of montane meadows in the Willamette National Forest, identifies encroachment patterns in relation to topographic features and proximity to trees in the Chucksney-Grasshopper meadow complex, and examines tree species and age distributions in relation to distance from forest edges or isolated tree clusters in the West Middle Prairie meadow. The Willamette National Forest covers approximately 6780 km² and intersects two main physiographic provinces comprised of the Cascade Crest Montane Forests and Subalpine/Alpine regions to the east, and the Western Cascades Montane, Lowland, and Valley regions to the west. Tree species commonly found in the study area include firs, cedar, pine, larch, spruce, and hemlock. Non-forested openings, including meadows, are distributed throughout the study area. Matched Filtering analysis was applied to Landsat ETM+ imagery acquired in September 2002 and combined with ancillary data that delineates stand replacing fire and harvest disturbances that occurred between 1972 and 2004 to create a vegetation classification of the Willamette National Forest that identifies meadows. The meadow classification was then combined with data depicting topographic position, slope, aspect, and elevation. Chi-squared statistics were applied to determine if meadows were significantly concentrated in areas characterized by these physical factors. In the western extent of the Willamette National Forest, meadows are concentrated on steep, south and east facing ridges between 1000 and 2000m in elevation. In the eastern extent of the Willamette National Forest, meadows are concentrated in valleys between 500 and 1000 meters in elevation and occur on both gentle and steep, east and south facing slopes. The vegetation classification provides a consistent and comprehensive dataset of meadow distribution in the Willamette National Forest. The Chucksney-Grasshopper meadow complex is contained by the Chucksney Mountain roadless area and comprised of approximately 8 distinct meadows located 27 kilometers northeast of Oakridge in the Willamette National Forest. The meadows occur on mostly south and east facing steep slopes near the ridgeline, and host varied dry and mesic plant communities. Herbaceous cover for three snapshots in time was classified using aerial photographs taken in 1947, 1972, and 2005 to determine conifer encroachment into the meadows. Chi-squared statistics were applied to determine if encroachment patterns were associated with slope, aspect, or proximity to tree cover. Encroachment occurred significantly closer to existing trees in all meadows suggesting the ameliorating effects of forest create conditions favorable for seedling establishment. Encroachment was also significant on steep, south and east facing slopes in some meadows, but also on gentle, west facing slopes in other meadows indicating a complex interaction of land use history, physical, and biological factors. The encroachment history analysis provides the preliminary framework for a model that can be used to identify meadows at risk for invasion. The West Middle Prairie of the Chucksney-Grasshopper complex, also known as Meadow 4, is a 21 hectare meadow characterized by a dry meadow community at the northern boundary, a mesic forest-meadow mosaic towards the southern boundary, and a rock garden at the western boundary. This meadow underwent mechanical tree removal in 1964 and a prescribed burn in 1996 to thwart conifer invasion. Four transects intersecting burned and unburned areas at the forest edge and through isolated tree clusters were sampled to determine the distribution of tree species and ages relative to their position in the transect. Data imply Pinus contorta invasion was promoted by the 1996 burns and that seedling establishment has occurred progressively from forest edges as well as simultaneously in a band along the forest edge. These findings suggest the prescribed burn was not adequate to control invasion and such management methods should be reviewed in the context of on-going research into alternate eradication measures. This research also supports other work that suggests initial seedling establishment accelerates subsequent seedling establishment and that eradication of early invaders is important for efficient management. This study can inform meadow habitat maintenance and restoration in three ways: it provides and inventory of meadows in the Willamette National Forest, a framework for a tool to predict which meadows are at risk for invasion and therefore are potential targets for action, and finally a report on past maintenance efforts and observation of invasion patterns at a fine scale. Title: Meadow classification in the Willamette National Forest and conifer encroachment patterns in the Chucksney-Grasshopper meadow complex, Western Cascade Range, Oregon Author: Dailey, Michele Meadows This study delineates and characterizes the distribution of montane meadows in the Willamette National Forest, identifies encroachment patterns in relation to topographic features and proximity to trees in the Chucksney-Grasshopper meadow complex, and examines tree species and age distributions in relation to distance from forest edges or isolated tree clusters in the West Middle Prairie meadow. The Willamette National Forest covers approximately 6780 km² and intersects two main physiographic provinces comprised of the Cascade Crest Montane Forests and Subalpine/Alpine regions to the east, and the Western Cascades Montane, Lowland, and Valley regions to the west. Tree species commonly found in the study area include firs, cedar, pine, larch, spruce, and hemlock. Non-forested openings, including meadows, are distributed throughout the study area. Matched Filtering analysis was applied to Landsat ETM+ imagery acquired in September 2002 and combined with ancillary data that delineates stand replacing fire and harvest disturbances that occurred between 1972 and 2004 to create a vegetation classification of the Willamette National Forest that identifies meadows. The meadow classification was then combined with data depicting topographic position, slope, aspect, and elevation. Chi-squared statistics were applied to determine if meadows were significantly concentrated in areas characterized by these physical factors. In the western extent of the Willamette National Forest, meadows are concentrated on steep, south and east facing ridges between 1000 and 2000m in elevation. In the eastern extent of the Willamette National Forest, meadows are concentrated in valleys between 500 and 1000 meters in elevation and occur on both gentle and steep, east and south facing slopes. The vegetation classification provides a consistent and comprehensive dataset of meadow distribution in the Willamette National Forest. The Chucksney-Grasshopper meadow complex is contained by the Chucksney Mountain roadless area and comprised of approximately 8 distinct meadows located 27 kilometers northeast of Oakridge in the Willamette National Forest. The meadows occur on mostly south and east facing steep slopes near the ridgeline, and host varied dry and mesic plant communities. Herbaceous cover for three snapshots in time was classified using aerial photographs taken in 1947, 1972, and 2005 to determine conifer encroachment into the meadows. Chi-squared statistics were applied to determine if encroachment patterns were associated with slope, aspect, or proximity to tree cover. Encroachment occurred significantly closer to existing trees in all meadows suggesting the ameliorating effects of forest create conditions favorable for seedling establishment. Encroachment was also significant on steep, south and east facing slopes in some meadows, but also on gentle, west facing slopes in other meadows indicating a complex interaction of land use history, physical, and biological factors. The encroachment history analysis provides the preliminary framework for a model that can be used to identify meadows at risk for invasion. The West Middle Prairie of the Chucksney-Grasshopper complex, also known as Meadow 4, is a 21 hectare meadow characterized by a dry meadow community at the northern boundary, a mesic forest-meadow mosaic towards the southern boundary, and a rock garden at the western boundary. This meadow underwent mechanical tree removal in 1964 and a prescribed burn in 1996 to thwart conifer invasion. Four transects intersecting burned and unburned areas at the forest edge and through isolated tree clusters were sampled to determine the distribution of tree species and ages relative to their position in the transect. Data imply Pinus contorta invasion was promoted by the 1996 burns and that seedling establishment has occurred progressively from forest edges as well as simultaneously in a band along the forest edge. These findings suggest the prescribed burn was not adequate to control invasion and such management methods should be reviewed in the context of on-going research into alternate eradication measures. This research also supports other work that suggests initial seedling establishment accelerates subsequent seedling establishment and that eradication of early invaders is important for efficient management. This study can inform meadow habitat maintenance and restoration in three ways: it provides and inventory of meadows in the Willamette National Forest, a framework for a tool to predict which meadows are at risk for invasion and therefore are potential targets for action, and finally a report on past maintenance efforts and observation of invasion patterns at a fine scale. Close

• 17. [Article] Studies to facilitate reintroduction of golden paintbrush (Castilleja levisecta) to the Willamette Valley, Oregon

  Golden paintbrush (Castilleja levisecta Greenman) historically inhabited the prairies of the Willamette Valley, Oregon. However, this Pacific Northwest endemic is currently restricted to eleven sites in ...

  Citation × Citation Citation Abstract Copy Title: Studies to facilitate reintroduction of golden paintbrush (Castilleja levisecta) to the Willamette Valley, Oregon Author: Lawrence, Beth A. Golden paintbrush (Castilleja levisecta Greenman) historically inhabited the prairies of the Willamette Valley, Oregon. However, this Pacific Northwest endemic is currently restricted to eleven sites in the Puget Trough of Washington and British Columbia. Recovery criteria call for the establishment of new populations throughout the species historic range, including the Willamette Valley. In order to facilitate reintroduction to this region, we examined: (1) habitat characteristics of potential C. levisecta recovery sites in the Willamette Valley and compared them to remaining populations in the Puget Trough, (2) a suite of ecological and genetic factors likely to contribute to reintroduction success using common garden experiments, and (3) how the performance of this rare hemiparasite was affected by the availability of different host combinations in the greenhouse and in the field. Potential C. levisecta reintroduction sites in the Willamette Valley had distinct vegetation communities and soil characteristics compared with remaining populations in the Puget Trough. This disparity was likely related to regional differences in geology, climate, ocean proximity, and land-use history. Many of the species indicative of remaining populations in the Puget Trough were native pereimials, while those of potential reintroduction sites in the Willamette Valley were introduced annuals. Soil characteristics of C. levisecta sites were also distinct among the two ecoregions. Puget Trough sites were located on sandy soils with generally high levels of magnesium and sulfur, while Willamette Valley sites were found on silty-clay soils with high concentrations of potassium and phosphorous. Differences in soil texture, and magnesium and potassium concentrations were associated with plant community divergence among the two regions. Decisions regarding seed source and recovery site selection are especially difficult in portions of a species range that are uninhabited, as no reference populations exist with which to compare ecological information. Using common garden experiments, we tested hypotheses about how C. levisecta transplants would perform in relation to the ecological similarity between seed source and introduction site, the effective population size and genetic diversity of seed sources, and the habitat quality of the recovery site. We observed significant variation in performance measures among source populations and common garden sites. Plant community characteristics, including the abundance of nonnative species and the similarity in community structure between source populations and common garden sites, helped explain the variation in these performance measures. Exotic species cover at common garden sites was associated with a reduction in performance of first year C. levisecta transplants. Survival of second year transplants increased with increasing similarity in plant functional groups between source and common garden sites, supporting the idea of a "home-habitat advantage." These results indicate that high quality prairies, dominated by native perennial species with low nonnative abundance, should be targeted for recovery sites. We recommend using plant material from Whidbey Island, WA, whose three populations represented in our study consistently performed well. Rare, parasitic plants pose an interesting challenge to restoration practitioners. We examined how the performance of C. levisecta was affected by the availability of different host combinations in the greenhouse and in the field. Castilleja levisecta individuals were grown with two grass individuals (Festuca roemeri; Poaceae), two non-grass hosts (Eriophyllum lanatum; Asteraceae), one individual of each of these species, or without a host. Our greenhouse results provide little support for the complimentary diet hypothesis, which states that parasites grown with multiple host species perform better than individuals grown alone or with a single host. Castilleja levisecta individuals grown with two different species performed better than those co-planted only with F. roemeri, but did not differ from E. lanatum or no-host treatments. In the field, vole activity had indirect effects on C. levisecta survival mediated through host species. Vole tunneling and C. levisecta mortality were strongly associated with host treatments including E. lanatum. Field survival was significantly higher among no-host C. levisecta individuals than those grown with E. lanatum or mixed host treatments. We do not suggest coplanting C. levisecta with E. lanatum in the field. Although no-host C. levisecta individuals had the greatest first year field survival, we suspect that perennial host plants will be beneficial to future survival. Therefore, we recommend planting C. levisecta in the Willamette Valley, OR with F. roemeri. Title: Studies to facilitate reintroduction of golden paintbrush (Castilleja levisecta) to the Willamette Valley, Oregon Author: Lawrence, Beth A. Golden paintbrush (Castilleja levisecta Greenman) historically inhabited the prairies of the Willamette Valley, Oregon. However, this Pacific Northwest endemic is currently restricted to eleven sites in the Puget Trough of Washington and British Columbia. Recovery criteria call for the establishment of new populations throughout the species historic range, including the Willamette Valley. In order to facilitate reintroduction to this region, we examined: (1) habitat characteristics of potential C. levisecta recovery sites in the Willamette Valley and compared them to remaining populations in the Puget Trough, (2) a suite of ecological and genetic factors likely to contribute to reintroduction success using common garden experiments, and (3) how the performance of this rare hemiparasite was affected by the availability of different host combinations in the greenhouse and in the field. Potential C. levisecta reintroduction sites in the Willamette Valley had distinct vegetation communities and soil characteristics compared with remaining populations in the Puget Trough. This disparity was likely related to regional differences in geology, climate, ocean proximity, and land-use history. Many of the species indicative of remaining populations in the Puget Trough were native pereimials, while those of potential reintroduction sites in the Willamette Valley were introduced annuals. Soil characteristics of C. levisecta sites were also distinct among the two ecoregions. Puget Trough sites were located on sandy soils with generally high levels of magnesium and sulfur, while Willamette Valley sites were found on silty-clay soils with high concentrations of potassium and phosphorous. Differences in soil texture, and magnesium and potassium concentrations were associated with plant community divergence among the two regions. Decisions regarding seed source and recovery site selection are especially difficult in portions of a species range that are uninhabited, as no reference populations exist with which to compare ecological information. Using common garden experiments, we tested hypotheses about how C. levisecta transplants would perform in relation to the ecological similarity between seed source and introduction site, the effective population size and genetic diversity of seed sources, and the habitat quality of the recovery site. We observed significant variation in performance measures among source populations and common garden sites. Plant community characteristics, including the abundance of nonnative species and the similarity in community structure between source populations and common garden sites, helped explain the variation in these performance measures. Exotic species cover at common garden sites was associated with a reduction in performance of first year C. levisecta transplants. Survival of second year transplants increased with increasing similarity in plant functional groups between source and common garden sites, supporting the idea of a "home-habitat advantage." These results indicate that high quality prairies, dominated by native perennial species with low nonnative abundance, should be targeted for recovery sites. We recommend using plant material from Whidbey Island, WA, whose three populations represented in our study consistently performed well. Rare, parasitic plants pose an interesting challenge to restoration practitioners. We examined how the performance of C. levisecta was affected by the availability of different host combinations in the greenhouse and in the field. Castilleja levisecta individuals were grown with two grass individuals (Festuca roemeri; Poaceae), two non-grass hosts (Eriophyllum lanatum; Asteraceae), one individual of each of these species, or without a host. Our greenhouse results provide little support for the complimentary diet hypothesis, which states that parasites grown with multiple host species perform better than individuals grown alone or with a single host. Castilleja levisecta individuals grown with two different species performed better than those co-planted only with F. roemeri, but did not differ from E. lanatum or no-host treatments. In the field, vole activity had indirect effects on C. levisecta survival mediated through host species. Vole tunneling and C. levisecta mortality were strongly associated with host treatments including E. lanatum. Field survival was significantly higher among no-host C. levisecta individuals than those grown with E. lanatum or mixed host treatments. We do not suggest coplanting C. levisecta with E. lanatum in the field. Although no-host C. levisecta individuals had the greatest first year field survival, we suspect that perennial host plants will be beneficial to future survival. Therefore, we recommend planting C. levisecta in the Willamette Valley, OR with F. roemeri. Close

• 18. [Article] Ecological survey and interpretation of the Willamette Floodplain Research Natural Area, W.L. Finley National Wildlife Refuge, Oregon

  The purpose of this study was to: (1) evaluate land use and vegetation history of the Willamette Floodplain Research Natural Area; (2) characterize present day vegetation; (3) evaluate the relation of ...

  Citation × Citation Citation Abstract Copy Title: Ecological survey and interpretation of the Willamette Floodplain Research Natural Area, W.L. Finley National Wildlife Refuge, Oregon Author: Streatfeild, Rosemary Welch The purpose of this study was to: (1) evaluate land use and vegetation history of the Willamette Floodplain Research Natural Area; (2) characterize present day vegetation; (3) evaluate the relation of vegetation to environment, and (4) establish a baseline dataset for future trend analysis in order that response of different plant species to fire frequencies may be assessed. I used historical records, aerial photographs, interviews, and literature to ascertain land use and vegetation history. I assumed that the RNA had been maintained as prairie by periodic aboriginal burning. Fire ignited by settlers continued as a management tool into the late 19th century. Grazing was a major disturbance in the late 19th and early 20th centuries, and plowing or some other soil disturbance on the raised elongated mounds may have occurred. With removal of livestock grazing in the early 1960s and only a sporadic burning program, shrub cover increased markedly over the past several decades. I surveyed vegetation in the summer of 1991 in 36 random permanent plots. 1 classified species cover with two-way indicator species analysis, identifying two major communities. One is dominated by tall dense Rosa eg'lanteria, Hypericum perforatum, and many alien weedy species located on slightly elevated mounds, and the other is dominated by shorter but also dense Rosa eglanteria, Deschampsia cespitosa, and many species with wetland affinity on intermounds. Monotypic patches of Spiraea douglasii also occur on intermounds. Species composition strongly correlates with raicrotopography related to an indirect soil moisture index based on wetland status of individual species. Composition correlates less strongly with year since last burn. I confirmed vegetation-environment relations by null hypothesis analysis, tested by multi-response permutation procedure. Vegetation significantly differs on mounds vs. intermounds and vegetation significantly reflects burning history. I ordinated floristic data by non-metric scaling. I also tallied nested frequency data as a baseline for future trend analysis in order to assess change in vegetation in response to fire frequency. Frequency change of Rosa eglanteria will best be detected by change in a 0.01 m2 plot size, Holcus lanatus by a 0.10 m2 plot, and remaining species by a 1.00 m2 plot. Title: Ecological survey and interpretation of the Willamette Floodplain Research Natural Area, W.L. Finley National Wildlife Refuge, Oregon Author: Streatfeild, Rosemary Welch The purpose of this study was to: (1) evaluate land use and vegetation history of the Willamette Floodplain Research Natural Area; (2) characterize present day vegetation; (3) evaluate the relation of vegetation to environment, and (4) establish a baseline dataset for future trend analysis in order that response of different plant species to fire frequencies may be assessed. I used historical records, aerial photographs, interviews, and literature to ascertain land use and vegetation history. I assumed that the RNA had been maintained as prairie by periodic aboriginal burning. Fire ignited by settlers continued as a management tool into the late 19th century. Grazing was a major disturbance in the late 19th and early 20th centuries, and plowing or some other soil disturbance on the raised elongated mounds may have occurred. With removal of livestock grazing in the early 1960s and only a sporadic burning program, shrub cover increased markedly over the past several decades. I surveyed vegetation in the summer of 1991 in 36 random permanent plots. 1 classified species cover with two-way indicator species analysis, identifying two major communities. One is dominated by tall dense Rosa eg'lanteria, Hypericum perforatum, and many alien weedy species located on slightly elevated mounds, and the other is dominated by shorter but also dense Rosa eglanteria, Deschampsia cespitosa, and many species with wetland affinity on intermounds. Monotypic patches of Spiraea douglasii also occur on intermounds. Species composition strongly correlates with raicrotopography related to an indirect soil moisture index based on wetland status of individual species. Composition correlates less strongly with year since last burn. I confirmed vegetation-environment relations by null hypothesis analysis, tested by multi-response permutation procedure. Vegetation significantly differs on mounds vs. intermounds and vegetation significantly reflects burning history. I ordinated floristic data by non-metric scaling. I also tallied nested frequency data as a baseline for future trend analysis in order to assess change in vegetation in response to fire frequency. Frequency change of Rosa eglanteria will best be detected by change in a 0.01 m2 plot size, Holcus lanatus by a 0.10 m2 plot, and remaining species by a 1.00 m2 plot. Close

• 19. [Article] Restructuring of land and community in the remote rural west : the case of Wallowa County, Oregon

  Since at least the 1970s, rural areas in the western United States, as elsewhere across the country and world, have been subject to social, economic, and political forces that have resulted in novel demographic ...

  Citation × Citation Citation Abstract Copy Title: Restructuring of land and community in the remote rural west : the case of Wallowa County, Oregon Author: Abrams, Jesse Since at least the 1970s, rural areas in the western United States, as elsewhere across the country and world, have been subject to social, economic, and political forces that have resulted in novel demographic and land tenure trends when compared to previous decades. Collectively, these processes of restructuring have created material effects in the form of diversifying patterns of land ownership, use, and economic relations and at the same time have precipitated social conflict regarding the legitimacy of various claims on rural space. In this case study, I examine in detail the manifestation of these interrelated material and symbolic dynamics within one particular community, Wallowa County, Oregon, as it experiences a wave of new rural landowners and associated changes in land access and use. I pay particular attention to the categories of "amenity-oriented" and "production-oriented" landowners, as well as year-round and seasonally-resident landowners, because these categories are situated at the center of local discourse regarding land tenure and use dynamics. Methods for this study include key informant interviews with 70 individuals, a mail-administered survey of 209 Wallowa County landowners, review of secondary data sources, and direct observation as a member of the Wallowa County community. This case study includes a land tenure and use history of Wallowa County, a review of pertinent quantitative land ownership and use data, and analyses of the symbolic (discursive), material (land use), and political dimensions of restructuring in Wallowa County. I discuss ways in which observed patterns of land tenure and use reflect complex influences, based ultimately in class, culture, livelihood, and associated identities and environmental ideologies. I pay particular attention to the contradictory nature of narratives of land ownership, rurality, and nonhuman nature and the ways in which these affect land uses and land use politics. I close with a series of recommendations for rural communities experiencing amenity-driven property turnover. Title: Restructuring of land and community in the remote rural west : the case of Wallowa County, Oregon Author: Abrams, Jesse Since at least the 1970s, rural areas in the western United States, as elsewhere across the country and world, have been subject to social, economic, and political forces that have resulted in novel demographic and land tenure trends when compared to previous decades. Collectively, these processes of restructuring have created material effects in the form of diversifying patterns of land ownership, use, and economic relations and at the same time have precipitated social conflict regarding the legitimacy of various claims on rural space. In this case study, I examine in detail the manifestation of these interrelated material and symbolic dynamics within one particular community, Wallowa County, Oregon, as it experiences a wave of new rural landowners and associated changes in land access and use. I pay particular attention to the categories of "amenity-oriented" and "production-oriented" landowners, as well as year-round and seasonally-resident landowners, because these categories are situated at the center of local discourse regarding land tenure and use dynamics. Methods for this study include key informant interviews with 70 individuals, a mail-administered survey of 209 Wallowa County landowners, review of secondary data sources, and direct observation as a member of the Wallowa County community. This case study includes a land tenure and use history of Wallowa County, a review of pertinent quantitative land ownership and use data, and analyses of the symbolic (discursive), material (land use), and political dimensions of restructuring in Wallowa County. I discuss ways in which observed patterns of land tenure and use reflect complex influences, based ultimately in class, culture, livelihood, and associated identities and environmental ideologies. I pay particular attention to the contradictory nature of narratives of land ownership, rurality, and nonhuman nature and the ways in which these affect land uses and land use politics. I close with a series of recommendations for rural communities experiencing amenity-driven property turnover. Close

• 20. [Article] Patterns of tree establishment and vegetation composition in relation to climate and topography of a subalpine meadow landscape, Jefferson Park, Oregon, USA

  The forest alpine tundra ecotone (FTE, also known as alpine treeline or subalpine parkland), is a conspicuous feature of mountain landscapes throughout the world. Climate change-driven increases in temperature ...

  Citation × Citation Citation Abstract Copy Title: Patterns of tree establishment and vegetation composition in relation to climate and topography of a subalpine meadow landscape, Jefferson Park, Oregon, USA Author: Zald, Harold Samuel James The forest alpine tundra ecotone (FTE, also known as alpine treeline or subalpine parkland), is a conspicuous feature of mountain landscapes throughout the world. Climate change-driven increases in temperature are believed to result in FTE movement and tree invasion of subalpine meadows, which have been documented throughout the Northern Hemisphere across a wide range of geographic locations, climatic regimes, forest types, land use histories, and disturbance regimes. Climate-driven FTE movement may have numerous ecological effects such as: positive temperature feedbacks, increased net primary productivity and carbon storage, and declines of plant populations and species. The magnitude of these ecological effects is highly uncertain, but will be largely determined by the rates and spatial extent of FTE movement and meadow invasion. FTE movement and meadow invasion are often considered at global or regional spatial scales in relation to climate, yet they are fundamentally driven by tree regeneration processes that are influenced by a variety of climatic and biophysical factors at micro site, landscape, and regional scales. Much of the research on the FTE has not taken a landscape approach incorporating multi-scale processes. For example, species distribution models used to project climate change effects on future species distributions and plant biodiversity in mountainous landscapes rely on species distribution data that is often sparse and incomplete across FTE landscapes. This dissertation attempts to overcome many of the limitations in FTE research by taking a landscape approach to develop a greater understanding of past spatiotemporal patterns of tree invasion, current spatial patterns of vegetation composition and structure, and potential future patterns of climate-driven tree invasion in the FTE. The setting for this research is Jefferson Park, a 260 ha subalpine parkland landscape in the Oregon High Cascades, USA. This study uses field plots, remotely sensed imagery, airborne Light Detection and Ranging (LiDAR), and simulation modeling to: 1) predictively map current fine-scale species distributions, vegetation structure, and tree ages; 2) reconstruct patterns of tree invasion over the last fifty years in subalpine meadows in relation to climatic conditions, landforms, microtopography, and seed dispersal limitations; and 3) develop a statistical model that projects future patterns of tree invasion into subalpine meadows under different climate scenarios in Jefferson Park. In chapter two, I generated fine-scale spatially-explicit predictions of current vegetation composition, structure, and tree ages in the Jefferson Park study area. Objectives of this chapter were threefold: 1) to characterize spatial patterns of tree ages, vegetation composition, and vegetation structure in a FTE landscape in the Oregon Cascades using predictive mapping; 2) determine how vegetation composition and structure were associated with gradients of environmental factors derived from multispectral satellite imagery and Light Detection and Ranging (LiDAR) data; and 3) determine if predictive mapping characterizations of tree age, vegetation composition, and vegetation structure were improved by the inclusion of LiDAR data. Predictive mapping of vegetation attributes was accomplished using gradient analysis with nearest neighbor imputation; integrating field plots, multispectral SPOT 5 satellite imagery, and LiDAR data. Vegetation composition was best described by SPOT 5 imagery and LiDAR-derived topography, while vegetation structure was best described by LiDAR-derived vegetation heights. Predictions of species occurrence were most accurate for tree species, moderate for shrub species and vegetation groups, and highly variable for graminoid species. Tree age, which was the most accurately predicted vegetation structure variable, indicates the study area was largely un-forested in 1600, gradually invaded by trees from 1600 to the 1920's, and rapidly invaded from the 1920's to 1980. Predictive mapping of vegetation structure variables such as basal area and stand density were subject to large amounts of error, possibly resulting from scale incompatibilities between vegetation patterns and plot size, and/or heterogeneous FTE landscapes where forest structure does not develop along consistent trajectories with stand age. This study suggests integrating multispectral satellite imagery, LiDAR data, and field plots can accurately predict fine-scale spatial characterizations of species distributions and tree invasion in the FTE. This study also indicates that sample design can influence spatial patterns of model uncertainty, which needs to be considered if predictive mapping of vegetation and sensitive ecosystems is a component of inventory and monitoring programs. In chapter three, I focused on quantifying spatiotemporal patterns of subalpine parkland tree invasion in Jefferson Park over the past five decades in relation multi-scale climatic and biophysical controls. LiDAR data provided previously unavailable fine-scale spatial characterizations of microtopography and vegetation structure. I utilized LiDAR, georeferenced field plots, and tree establishment reconstructions to quantify spatiotemporal patterns of tree invasion in relation to late season snow persistence, landform types, fine-scale topographic variability, distances from potential seed sources, and climate variation within 130 ha of the subalpine parkland landscape of Jefferson Park. Tree occurrence (i.e. tree presence in 2 m plots and grid cells) occurred in 7.75% of study area meadows in 1950 and increased to 34.7% in 2007. Landform types and finer-scale patterns of topography and vegetation structure influenced summer snow depth, which influenced temporal and spatial patterns of tree establishment. Tree invasion rates were higher on debris flow landforms, which had lower summer snow depth than glacial landforms, suggesting potentially rapid treeline responses to disturbance events. Tree invasion rates were strongly associated with reduced annual snow fall on glacial landforms, but not on debris flows. Tree establishment was spatially constrained to micro sites with high topographic positions and close proximity to overstory canopy, site conditions associated with low summer snow depth. Seed source limitations placed an additional species-specific spatial constraint on where trees invaded meadows. Climate and topography had an interactive effect, with trees establishing on higher topographic positions during both high snow/low temperature and low snow/high temperature periods, but had greater than expected establishment on lower topographic positions during low snow/high temperature periods. Within the context of larger landform types, topography and proximity to overstory trees constrained where trees established in the meadows, even during climate periods with higher temperatures and lower snowfall. Results of this study suggest large scale climate-driven models of vegetation change may overestimate treeline movement and meadow invasion, because they do not account for biophysical controls limiting tree establishment at multiple spatial scales. In chapter four, I used field data and analyses from chapter 3 to parameterize a spatially and temporally explicit statistical model of fine-scale tree invasion within 130 ha of the Jefferson Park study area. The model incorporated both the climatic and biophysical controls found in chapter 3 to influence tree invasion. The model was used in two ways: (1) to spatially project patterns of tree invasion from 1950 to 2007 in response to historical climate; and (2) to project future tree invasion of the study area from 2007 to 2064 under six different annual snowfall scenarios. Modeling addressed the following questions: (1) Can fine-scale (2 m pixel size) patterns of historical tree invasion be accurately predicted? (2) How sensitive is future tree invasion (and therefore meadow persistence) to different future snowfall scenarios? (3) Are non-climatic factors such as landforms and biotic interactions associated with different spatial patterns of tree invasion? From 1950 to 2007, simulated historical meadow area declined from 82% to 65% of the study area. Model outputs of historical area, spatial distributions, and spatial clustering of tree invasion generally agreed with independent validation, and suggest biotic interactions due to young tree establishment facilitation are important on glacial landforms but not debris flows. Simulations of future scenarios indicated meadow declined to 36 to 43% of the study area by 2064. Projected meadow area declined with reduced annual snow fall, but not under prolonged high and low snow fall periods. Meadows persisted under all future scenarios in 2064. This model suggests subalpine meadows may significantly decline under climate warming, but will still persist in 2064. Micro sites and recruitment limitation may be equally or more important factors than climate change in influencing subalpine landscape change, suggesting local high-elevation persistence of subalpine meadows under future climate warming. Title: Patterns of tree establishment and vegetation composition in relation to climate and topography of a subalpine meadow landscape, Jefferson Park, Oregon, USA Author: Zald, Harold Samuel James The forest alpine tundra ecotone (FTE, also known as alpine treeline or subalpine parkland), is a conspicuous feature of mountain landscapes throughout the world. Climate change-driven increases in temperature are believed to result in FTE movement and tree invasion of subalpine meadows, which have been documented throughout the Northern Hemisphere across a wide range of geographic locations, climatic regimes, forest types, land use histories, and disturbance regimes. Climate-driven FTE movement may have numerous ecological effects such as: positive temperature feedbacks, increased net primary productivity and carbon storage, and declines of plant populations and species. The magnitude of these ecological effects is highly uncertain, but will be largely determined by the rates and spatial extent of FTE movement and meadow invasion. FTE movement and meadow invasion are often considered at global or regional spatial scales in relation to climate, yet they are fundamentally driven by tree regeneration processes that are influenced by a variety of climatic and biophysical factors at micro site, landscape, and regional scales. Much of the research on the FTE has not taken a landscape approach incorporating multi-scale processes. For example, species distribution models used to project climate change effects on future species distributions and plant biodiversity in mountainous landscapes rely on species distribution data that is often sparse and incomplete across FTE landscapes. This dissertation attempts to overcome many of the limitations in FTE research by taking a landscape approach to develop a greater understanding of past spatiotemporal patterns of tree invasion, current spatial patterns of vegetation composition and structure, and potential future patterns of climate-driven tree invasion in the FTE. The setting for this research is Jefferson Park, a 260 ha subalpine parkland landscape in the Oregon High Cascades, USA. This study uses field plots, remotely sensed imagery, airborne Light Detection and Ranging (LiDAR), and simulation modeling to: 1) predictively map current fine-scale species distributions, vegetation structure, and tree ages; 2) reconstruct patterns of tree invasion over the last fifty years in subalpine meadows in relation to climatic conditions, landforms, microtopography, and seed dispersal limitations; and 3) develop a statistical model that projects future patterns of tree invasion into subalpine meadows under different climate scenarios in Jefferson Park. In chapter two, I generated fine-scale spatially-explicit predictions of current vegetation composition, structure, and tree ages in the Jefferson Park study area. Objectives of this chapter were threefold: 1) to characterize spatial patterns of tree ages, vegetation composition, and vegetation structure in a FTE landscape in the Oregon Cascades using predictive mapping; 2) determine how vegetation composition and structure were associated with gradients of environmental factors derived from multispectral satellite imagery and Light Detection and Ranging (LiDAR) data; and 3) determine if predictive mapping characterizations of tree age, vegetation composition, and vegetation structure were improved by the inclusion of LiDAR data. Predictive mapping of vegetation attributes was accomplished using gradient analysis with nearest neighbor imputation; integrating field plots, multispectral SPOT 5 satellite imagery, and LiDAR data. Vegetation composition was best described by SPOT 5 imagery and LiDAR-derived topography, while vegetation structure was best described by LiDAR-derived vegetation heights. Predictions of species occurrence were most accurate for tree species, moderate for shrub species and vegetation groups, and highly variable for graminoid species. Tree age, which was the most accurately predicted vegetation structure variable, indicates the study area was largely un-forested in 1600, gradually invaded by trees from 1600 to the 1920's, and rapidly invaded from the 1920's to 1980. Predictive mapping of vegetation structure variables such as basal area and stand density were subject to large amounts of error, possibly resulting from scale incompatibilities between vegetation patterns and plot size, and/or heterogeneous FTE landscapes where forest structure does not develop along consistent trajectories with stand age. This study suggests integrating multispectral satellite imagery, LiDAR data, and field plots can accurately predict fine-scale spatial characterizations of species distributions and tree invasion in the FTE. This study also indicates that sample design can influence spatial patterns of model uncertainty, which needs to be considered if predictive mapping of vegetation and sensitive ecosystems is a component of inventory and monitoring programs. In chapter three, I focused on quantifying spatiotemporal patterns of subalpine parkland tree invasion in Jefferson Park over the past five decades in relation multi-scale climatic and biophysical controls. LiDAR data provided previously unavailable fine-scale spatial characterizations of microtopography and vegetation structure. I utilized LiDAR, georeferenced field plots, and tree establishment reconstructions to quantify spatiotemporal patterns of tree invasion in relation to late season snow persistence, landform types, fine-scale topographic variability, distances from potential seed sources, and climate variation within 130 ha of the subalpine parkland landscape of Jefferson Park. Tree occurrence (i.e. tree presence in 2 m plots and grid cells) occurred in 7.75% of study area meadows in 1950 and increased to 34.7% in 2007. Landform types and finer-scale patterns of topography and vegetation structure influenced summer snow depth, which influenced temporal and spatial patterns of tree establishment. Tree invasion rates were higher on debris flow landforms, which had lower summer snow depth than glacial landforms, suggesting potentially rapid treeline responses to disturbance events. Tree invasion rates were strongly associated with reduced annual snow fall on glacial landforms, but not on debris flows. Tree establishment was spatially constrained to micro sites with high topographic positions and close proximity to overstory canopy, site conditions associated with low summer snow depth. Seed source limitations placed an additional species-specific spatial constraint on where trees invaded meadows. Climate and topography had an interactive effect, with trees establishing on higher topographic positions during both high snow/low temperature and low snow/high temperature periods, but had greater than expected establishment on lower topographic positions during low snow/high temperature periods. Within the context of larger landform types, topography and proximity to overstory trees constrained where trees established in the meadows, even during climate periods with higher temperatures and lower snowfall. Results of this study suggest large scale climate-driven models of vegetation change may overestimate treeline movement and meadow invasion, because they do not account for biophysical controls limiting tree establishment at multiple spatial scales. In chapter four, I used field data and analyses from chapter 3 to parameterize a spatially and temporally explicit statistical model of fine-scale tree invasion within 130 ha of the Jefferson Park study area. The model incorporated both the climatic and biophysical controls found in chapter 3 to influence tree invasion. The model was used in two ways: (1) to spatially project patterns of tree invasion from 1950 to 2007 in response to historical climate; and (2) to project future tree invasion of the study area from 2007 to 2064 under six different annual snowfall scenarios. Modeling addressed the following questions: (1) Can fine-scale (2 m pixel size) patterns of historical tree invasion be accurately predicted? (2) How sensitive is future tree invasion (and therefore meadow persistence) to different future snowfall scenarios? (3) Are non-climatic factors such as landforms and biotic interactions associated with different spatial patterns of tree invasion? From 1950 to 2007, simulated historical meadow area declined from 82% to 65% of the study area. Model outputs of historical area, spatial distributions, and spatial clustering of tree invasion generally agreed with independent validation, and suggest biotic interactions due to young tree establishment facilitation are important on glacial landforms but not debris flows. Simulations of future scenarios indicated meadow declined to 36 to 43% of the study area by 2064. Projected meadow area declined with reduced annual snow fall, but not under prolonged high and low snow fall periods. Meadows persisted under all future scenarios in 2064. This model suggests subalpine meadows may significantly decline under climate warming, but will still persist in 2064. Micro sites and recruitment limitation may be equally or more important factors than climate change in influencing subalpine landscape change, suggesting local high-elevation persistence of subalpine meadows under future climate warming. Close

• 21. [Article] Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California

  Anthropogenic land use alterations such as livestock grazing and fire suppression have greatly altered sagebrush grasslands of the Great Basin, facilitating invasion of exotic annuals, increases in woody ...

  Citation × Citation Citation Abstract Copy Title: Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California Author: Ellsworth, Lisa M. Anthropogenic land use alterations such as livestock grazing and fire suppression have greatly altered sagebrush grasslands of the Great Basin, facilitating invasion of exotic annuals, increases in woody species, and losses of native species. Much of the current research surrounding wildland and prescribed fire in sagebrush dominated ecosystems has focused on a persistent belief that fire in sagebrush systems results in a loss of native flora and a trend toward dominance by exotic annuals. Fire was historically the dominant disturbance throughout the sagebrush steppe and the plant species that comprised these communities possess a variety of adaptations facilitating survival to the fire regime. In order to restore ecosystems, land managers will need to reintroduce natural ecosystem processes, including natural disturbance processes. To describe the response of these plant communities to fire, I examined the plant community response, seedbank response, and reproductive and density responses of three native bunchgrasses (Pseudoroegneria spicata, Achnatherum therberianum, and Elymus elymoides) as well as one native forb (Calochortus macrocarpus) following spring and fall prescribed fires at Lava Beds National Monument. Fires were applied to three Artemisia tridentata ssp. vaseyana (Mountain Big Sagebrush) plant communities with different land use and fire histories. These communities were different in composition ranging from a dominance of exotic annuals to dominance by native grasses, shrubs, and trees. Little is known about how prescribed fire affects the soil seed bank in sagebrush-dominated ecosystems. To address this, we quantified the emergence of Bromus tectorum (cheatgrass) seedlings as well as emergence of seedlings of functional groups (native forbs, bunchgrasses, and shrubs) in a seedbank germination study. At the invasive dominated site (Gillems Camp), we found 91% fewer B. tectorum seedlings germinated in spring burned sites than in controls immediately following spring prescribed burns. However, soils collected one-year following fire had 40% more B. tectorum germinants (8017 germinants/m [superscript 2]) than unburned controls (5132 germinants/m [superscript 2]). Following fall burns at this site there was a similar response, with a 56% immediate reduction in B. tectorum (as compared to unburned control) and a 59% increase in B. tectorum and 58% increase in exotic forb germinants one year following fires. There was an increase in native forb germination following spring burns (94%) and fall burns (45%) at a site dominated by native plants (Fleener Chimneys). Native bunchgrass seed germination declined following spring fire in sites dominated by sagebrush and native understory vegetation (79%), and in sites where Juniperus occidentalis (western juniper) and other woody species dominated (Merrill Caves) (71%). In invasive-dominated sites (Gillems Camp), there was a decrease in B. tectorum cover following both spring (81% decrease) and fall fires (82% decrease), and little native vegetation composition change. Shrub cover, made up predominantly of Chrysothamnus nauseosus, decreased following spring (95% decrease) and fall (93% decrease) fires. At the sagebrush, native understory site (Fleener Chimneys), there was a reduction in native bunchgrass cover (64% decrease), and an increase in native forbs (168% increase) following spring burns, with no changes following fall fires. At the juniper- woody dominated site (Merrill Caves), fire treatments resulted in a decrease in woody plant cover, with no immediate postfire differences seen in the herbaceous plant community. Density of bunchgrass species (Pseudoroegneria spicata, Achnatherum therberianum, Elymus elymoides) did not change following either spring or fall prescribed fire treatments. Fire enhanced flowering was not seen in C. macrocarpus following spring or fall burns at the native or juniper dominated sites. There was increased reproductive effort in native bunchgrass species following fires in all communities studied. Following spring fires at invasive dominated sites, there was a 245% increase in reproductive culms of P. spicata. Following fall fires in native dominated sites, we saw a 974% increase in reproductive culms of P. spicata and a 184% increase in reproductive culms of A. therberianum. Following fall fires at juniper-dominated sites, we saw in an increase in reproductive culms of P. spicata (678% increase), A. thurberianum (356% increase), and Elymus elymoides (209% increase). These results suggest that implementing prescribed fire in order to restore the natural disturbance regime in these fire-adapted ecosystems is beneficial to restoration and preservation of the native biota. Title: Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California Author: Ellsworth, Lisa M. Anthropogenic land use alterations such as livestock grazing and fire suppression have greatly altered sagebrush grasslands of the Great Basin, facilitating invasion of exotic annuals, increases in woody species, and losses of native species. Much of the current research surrounding wildland and prescribed fire in sagebrush dominated ecosystems has focused on a persistent belief that fire in sagebrush systems results in a loss of native flora and a trend toward dominance by exotic annuals. Fire was historically the dominant disturbance throughout the sagebrush steppe and the plant species that comprised these communities possess a variety of adaptations facilitating survival to the fire regime. In order to restore ecosystems, land managers will need to reintroduce natural ecosystem processes, including natural disturbance processes. To describe the response of these plant communities to fire, I examined the plant community response, seedbank response, and reproductive and density responses of three native bunchgrasses (Pseudoroegneria spicata, Achnatherum therberianum, and Elymus elymoides) as well as one native forb (Calochortus macrocarpus) following spring and fall prescribed fires at Lava Beds National Monument. Fires were applied to three Artemisia tridentata ssp. vaseyana (Mountain Big Sagebrush) plant communities with different land use and fire histories. These communities were different in composition ranging from a dominance of exotic annuals to dominance by native grasses, shrubs, and trees. Little is known about how prescribed fire affects the soil seed bank in sagebrush-dominated ecosystems. To address this, we quantified the emergence of Bromus tectorum (cheatgrass) seedlings as well as emergence of seedlings of functional groups (native forbs, bunchgrasses, and shrubs) in a seedbank germination study. At the invasive dominated site (Gillems Camp), we found 91% fewer B. tectorum seedlings germinated in spring burned sites than in controls immediately following spring prescribed burns. However, soils collected one-year following fire had 40% more B. tectorum germinants (8017 germinants/m [superscript 2]) than unburned controls (5132 germinants/m [superscript 2]). Following fall burns at this site there was a similar response, with a 56% immediate reduction in B. tectorum (as compared to unburned control) and a 59% increase in B. tectorum and 58% increase in exotic forb germinants one year following fires. There was an increase in native forb germination following spring burns (94%) and fall burns (45%) at a site dominated by native plants (Fleener Chimneys). Native bunchgrass seed germination declined following spring fire in sites dominated by sagebrush and native understory vegetation (79%), and in sites where Juniperus occidentalis (western juniper) and other woody species dominated (Merrill Caves) (71%). In invasive-dominated sites (Gillems Camp), there was a decrease in B. tectorum cover following both spring (81% decrease) and fall fires (82% decrease), and little native vegetation composition change. Shrub cover, made up predominantly of Chrysothamnus nauseosus, decreased following spring (95% decrease) and fall (93% decrease) fires. At the sagebrush, native understory site (Fleener Chimneys), there was a reduction in native bunchgrass cover (64% decrease), and an increase in native forbs (168% increase) following spring burns, with no changes following fall fires. At the juniper- woody dominated site (Merrill Caves), fire treatments resulted in a decrease in woody plant cover, with no immediate postfire differences seen in the herbaceous plant community. Density of bunchgrass species (Pseudoroegneria spicata, Achnatherum therberianum, Elymus elymoides) did not change following either spring or fall prescribed fire treatments. Fire enhanced flowering was not seen in C. macrocarpus following spring or fall burns at the native or juniper dominated sites. There was increased reproductive effort in native bunchgrass species following fires in all communities studied. Following spring fires at invasive dominated sites, there was a 245% increase in reproductive culms of P. spicata. Following fall fires in native dominated sites, we saw a 974% increase in reproductive culms of P. spicata and a 184% increase in reproductive culms of A. therberianum. Following fall fires at juniper-dominated sites, we saw in an increase in reproductive culms of P. spicata (678% increase), A. thurberianum (356% increase), and Elymus elymoides (209% increase). These results suggest that implementing prescribed fire in order to restore the natural disturbance regime in these fire-adapted ecosystems is beneficial to restoration and preservation of the native biota. Close

• 22. [Article] Comparison of Vermont and Oregon statutory land surveyor laws

  Land use planning, zoning, and subdivisions are integrally tied to the land resource. The need for a land surveyor and for statutes which govern his operation when working in these areas is stressed. A ...

  Citation × Citation Citation Abstract Copy Title: Comparison of Vermont and Oregon statutory land surveyor laws Author: Norton, Robert Leon Land use planning, zoning, and subdivisions are integrally tied to the land resource. The need for a land surveyor and for statutes which govern his operation when working in these areas is stressed. A brief history of Vermont and Oregon, illustrating the role of land surveys on settlement, is given. Statutes relative to: the registration of land surveyors, Vermont town lines, the Oregon county surveyor, Oregon subdivisions, Vermont land use, and state plane coordinate systems are discussed. Nine recommendations in these areas are made. Title: Comparison of Vermont and Oregon statutory land surveyor laws Author: Norton, Robert Leon Land use planning, zoning, and subdivisions are integrally tied to the land resource. The need for a land surveyor and for statutes which govern his operation when working in these areas is stressed. A brief history of Vermont and Oregon, illustrating the role of land surveys on settlement, is given. Statutes relative to: the registration of land surveyors, Vermont town lines, the Oregon county surveyor, Oregon subdivisions, Vermont land use, and state plane coordinate systems are discussed. Nine recommendations in these areas are made. Close

• 23. [Article] Land Use Planning Information for the Citizens of Oregon

  This white paper seeks to provide facts about the history of land use planning in Oregon while also identifying some of the key challenges facing planning in the future. It also includes useful information ...

  Citation × Citation Citation Abstract Copy Title: Land Use Planning Information for the Citizens of Oregon Author: Gray, John D. (John Delton), 1919-, Shriver, Katie This white paper seeks to provide facts about the history of land use planning in Oregon while also identifying some of the key challenges facing planning in the future. It also includes useful information about the work of the Oregon Task Force on Land Use Planning (the “Big Look” task force) and about some of the key research projects that should help provide some answers to current problems. Title: Land Use Planning Information for the Citizens of Oregon Author: Gray, John D. (John Delton), 1919-, Shriver, Katie This white paper seeks to provide facts about the history of land use planning in Oregon while also identifying some of the key challenges facing planning in the future. It also includes useful information about the work of the Oregon Task Force on Land Use Planning (the “Big Look” task force) and about some of the key research projects that should help provide some answers to current problems. Close

• 24. [Article] Surveys and surveyors of the public domain, 1785-1975

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: Surveys and surveyors of the public domain, 1785-1975 Author: Cazier, Lola, United States. Bureau of Land Management Gerald W. Williams Collection Title: Surveys and surveyors of the public domain, 1785-1975 Author: Cazier, Lola, United States. Bureau of Land Management Gerald W. Williams Collection Close

• 25. [Article] The economics of land gains taxation : the Vermont case

  Governments have employed special capital gains taxes to curb speculation in real estate and raise public revenue. Economic theory suggests that the introduction of a gains tax with a declining rate structure ...

  Citation × Citation Citation Abstract Copy Title: The economics of land gains taxation : the Vermont case Author: Daniels, Thomas L. Governments have employed special capital gains taxes to curb speculation in real estate and raise public revenue. Economic theory suggests that the introduction of a gains tax with a declining rate structure over time will induce prospective buyers to reduce their demand for land and will induce sellers to offer less land for sale at any one point in time. In this way, land price increases and subdivision activity are expected to be slowed. The implications of a gains tax as a rural land use control motivated the present study. First, the specific case of the Vermont gains tax is introduced along with a brief history of the Vermont land market and a critique of prior research on the Vermont tax. Then, the costs and benefits of land speculation are examined as a justification for government intervention in land markets. Next, the impact of the Vermont gains tax on individual buyer and seller decisions is explored and the impact of the Vermont tax on the entire land market is discussed. A hedonic land price determination model is developed and used to test hypotheses about the impact of the Vermont tax in different land markets. Pooled cross-section time series data from Vermont sample towns are applied to the model; and ordinary least squares is used to estimate land price equations. Chow tests indicate that structural changes in price determination occurred between the pre- and post-tax eras. Differences between taxable and nontaxable prices in the post-tax era are largely attributed to land quality differences - taxable land tended to sell for a higher price per acre. A statistical analysis of the impact of the Vermont gains tax on Vermont land market activity is also presented. The tax apparently has not reduced land prices or absentee ownership trends, but the percentage of speculative sales to total land sales has fallen over time. In conclusion, future directions for rural land market research are discussed along with policy recommendations for changes in the Vermont tax. Title: The economics of land gains taxation : the Vermont case Author: Daniels, Thomas L. Governments have employed special capital gains taxes to curb speculation in real estate and raise public revenue. Economic theory suggests that the introduction of a gains tax with a declining rate structure over time will induce prospective buyers to reduce their demand for land and will induce sellers to offer less land for sale at any one point in time. In this way, land price increases and subdivision activity are expected to be slowed. The implications of a gains tax as a rural land use control motivated the present study. First, the specific case of the Vermont gains tax is introduced along with a brief history of the Vermont land market and a critique of prior research on the Vermont tax. Then, the costs and benefits of land speculation are examined as a justification for government intervention in land markets. Next, the impact of the Vermont gains tax on individual buyer and seller decisions is explored and the impact of the Vermont tax on the entire land market is discussed. A hedonic land price determination model is developed and used to test hypotheses about the impact of the Vermont tax in different land markets. Pooled cross-section time series data from Vermont sample towns are applied to the model; and ordinary least squares is used to estimate land price equations. Chow tests indicate that structural changes in price determination occurred between the pre- and post-tax eras. Differences between taxable and nontaxable prices in the post-tax era are largely attributed to land quality differences - taxable land tended to sell for a higher price per acre. A statistical analysis of the impact of the Vermont gains tax on Vermont land market activity is also presented. The tax apparently has not reduced land prices or absentee ownership trends, but the percentage of speculative sales to total land sales has fallen over time. In conclusion, future directions for rural land market research are discussed along with policy recommendations for changes in the Vermont tax. Close

• 26. [Article] Land trusts in the New West : conserving and responding to local geographies?

  This research focuses on the relationship between the emerging role of land trusts and rapid growth and change in the West. Teton County, Idaho, Teton County, Wyoming, and Sublette County, Wyoming, and ...

  Citation × Citation Citation Abstract Copy Title: Land trusts in the New West : conserving and responding to local geographies? Author: Loynes, Kathryn This research focuses on the relationship between the emerging role of land trusts and rapid growth and change in the West. Teton County, Idaho, Teton County, Wyoming, and Sublette County, Wyoming, and each of their associated land trusts, are used as case studies. Each county has experienced varying levels of agricultural activity throughout their respective histories, with transformations over time bringing about the current local economies and land use patterns that exist today. Interviews were conducted with land trust staff members and city and county planning officials and integrated with an evaluation of the local geographies of each county (biophysical attributes, population dynamics, industry, policies, and residents' land management preferences) as well as broader scale regulations and economies. The end result of this project demonstrates at local and regional scales how land trusts have become major players in the land use-land tenure equation of Western communities and how their operations are unique to the cultural, physical, and economic-political geographies of their service areas. While the West tends to be lumped together as one large entity with regard to policy decisions and ideas about private property rights, this research reveals a high amount of variation in the processes occurring in and shaping relatively small areas of the Western states -- lending itself to further studies on the interaction between different scales of land patterns in the region as well as how communities are approaching the challenges of New West landscapes. Title: Land trusts in the New West : conserving and responding to local geographies? Author: Loynes, Kathryn This research focuses on the relationship between the emerging role of land trusts and rapid growth and change in the West. Teton County, Idaho, Teton County, Wyoming, and Sublette County, Wyoming, and each of their associated land trusts, are used as case studies. Each county has experienced varying levels of agricultural activity throughout their respective histories, with transformations over time bringing about the current local economies and land use patterns that exist today. Interviews were conducted with land trust staff members and city and county planning officials and integrated with an evaluation of the local geographies of each county (biophysical attributes, population dynamics, industry, policies, and residents' land management preferences) as well as broader scale regulations and economies. The end result of this project demonstrates at local and regional scales how land trusts have become major players in the land use-land tenure equation of Western communities and how their operations are unique to the cultural, physical, and economic-political geographies of their service areas. While the West tends to be lumped together as one large entity with regard to policy decisions and ideas about private property rights, this research reveals a high amount of variation in the processes occurring in and shaping relatively small areas of the Western states -- lending itself to further studies on the interaction between different scales of land patterns in the region as well as how communities are approaching the challenges of New West landscapes. Close

• 27. [Article] Federal land management and county government: 1908-2008 - A report of the “changing federal county payments policy and rural Oregon counties: impacts and options” project

  This report represents part of a study being conducted by the Rural Studies Program at Oregon State University that will analyze the impacts of reduced Federal land payments to counties on the services ...

  Citation × Citation Citation Abstract Copy Title: Federal land management and county government: 1908-2008 - A report of the “changing federal county payments policy and rural Oregon counties: impacts and options” project Author: Gaid, Dawn Marie, Adams, Vincent T. This report represents part of a study being conducted by the Rural Studies Program at Oregon State University that will analyze the impacts of reduced Federal land payments to counties on the services provided by county government in Oregon, and on citizens, businesses and institutions such as schools. The study also examines several county government options for managing these impacts, and state and federal government options for reducing the negative impacts. This report begins with a baseline description of the historical relationships between the Federal Government and local governments in Oregon – ownership and use of land and local revenues generated from public lands, including a review of the history of harvest revenue, federal payments to counties and local property tax burdens for the 36 Oregon counties. This is followed by a description of the “sea change” in the relationship associated with the restrictions on land use initiated in the 1980s on forest and rangeland leading to PL 106-393, and finishes with a summary of the current status of the reauthorization of federal payments. Title: Federal land management and county government: 1908-2008 - A report of the “changing federal county payments policy and rural Oregon counties: impacts and options” project Author: Gaid, Dawn Marie, Adams, Vincent T. This report represents part of a study being conducted by the Rural Studies Program at Oregon State University that will analyze the impacts of reduced Federal land payments to counties on the services provided by county government in Oregon, and on citizens, businesses and institutions such as schools. The study also examines several county government options for managing these impacts, and state and federal government options for reducing the negative impacts. This report begins with a baseline description of the historical relationships between the Federal Government and local governments in Oregon – ownership and use of land and local revenues generated from public lands, including a review of the history of harvest revenue, federal payments to counties and local property tax burdens for the 36 Oregon counties. This is followed by a description of the “sea change” in the relationship associated with the restrictions on land use initiated in the 1980s on forest and rangeland leading to PL 106-393, and finishes with a summary of the current status of the reauthorization of federal payments. Close

• 28. [Article] 'Hysterical preservationists' and 'gouge-and-run bulldozer boys' : the land-use controversy in Idaho’s White Cloud Mountains, 1968-1972

  Similar to other spectacular scenic areas in the American West, Idaho’s White Cloud Mountains have been a contested landscape since the beginning of the 20th century. Although, legislation was introduced ...

  Citation × Citation Citation Abstract Copy Title: 'Hysterical preservationists' and 'gouge-and-run bulldozer boys' : the land-use controversy in Idaho’s White Cloud Mountains, 1968-1972 Author: Jensen, Erica (Erica Lyn) Similar to other spectacular scenic areas in the American West, Idaho’s White Cloud Mountains have been a contested landscape since the beginning of the 20th century. Although, legislation was introduced in Congress as early as 1913 to protect the towering mountains of south-central Idaho as a national park, the issue did not generate significant interest until the 1960s. When American Smelting and Refining Company began exploring molybdenum deposits at the base of Castle Peak in the White Clouds in 1968, conservationists rallied around the call to ‘Save the White Clouds.’ Idaho Senator Frank Church proposed legislation to protect the mountains with either a Forest Service administered national recreation area or a national park. The issue found the national spotlight in January 1970 as Life magazine published an article on the land-use controversy. In November of the same year Cecil Andrus took over the governor’s office from incumbent Don Samuelson largely because Andrus opposed mining in the White Clouds. Despite all of Idaho’s congressional delegation supporting a national park and recreation complex, the legislation was modified in 1971 to create only a national recreation area under Forest Service management. Congress passed the bill and President Nixon signed the measure in 1972. The years between 1968 and 1972 offer an interesting glimpse into the conservation struggle in Idaho and how the emerging environmental movement reached even the highest peaks of central Idaho. The controversy highlights public concern over federal land use, reveals tensions between the Forest Service and National Park Service, and explores the dynamic relationship between politics and land management decisions. Title: 'Hysterical preservationists' and 'gouge-and-run bulldozer boys' : the land-use controversy in Idaho’s White Cloud Mountains, 1968-1972 Author: Jensen, Erica (Erica Lyn) Similar to other spectacular scenic areas in the American West, Idaho’s White Cloud Mountains have been a contested landscape since the beginning of the 20th century. Although, legislation was introduced in Congress as early as 1913 to protect the towering mountains of south-central Idaho as a national park, the issue did not generate significant interest until the 1960s. When American Smelting and Refining Company began exploring molybdenum deposits at the base of Castle Peak in the White Clouds in 1968, conservationists rallied around the call to ‘Save the White Clouds.’ Idaho Senator Frank Church proposed legislation to protect the mountains with either a Forest Service administered national recreation area or a national park. The issue found the national spotlight in January 1970 as Life magazine published an article on the land-use controversy. In November of the same year Cecil Andrus took over the governor’s office from incumbent Don Samuelson largely because Andrus opposed mining in the White Clouds. Despite all of Idaho’s congressional delegation supporting a national park and recreation complex, the legislation was modified in 1971 to create only a national recreation area under Forest Service management. Congress passed the bill and President Nixon signed the measure in 1972. The years between 1968 and 1972 offer an interesting glimpse into the conservation struggle in Idaho and how the emerging environmental movement reached even the highest peaks of central Idaho. The controversy highlights public concern over federal land use, reveals tensions between the Forest Service and National Park Service, and explores the dynamic relationship between politics and land management decisions. Close

• 29. [Article] Historical landscape reconstruction and perceptual geography of Mount Hood, Oregon

  This research seeks to understand the influences of perception on land use around the Mount Hood area of Oregon and evaluate how it has evolved over the past 4,000 years. The study addresses three specific ...

  Citation × Citation Citation Abstract Copy Title: Historical landscape reconstruction and perceptual geography of Mount Hood, Oregon Author: Belgam, Daniel R. This research seeks to understand the influences of perception on land use around the Mount Hood area of Oregon and evaluate how it has evolved over the past 4,000 years. The study addresses three specific questions: 1) How has the study area evolved over time into the modern landscape? 2) What land use practices have developed in response to various public perceptions of Mount Hood? 3) How have the land uses impacted the landscape and physical environment? This in-depth analysis of the historic landscape describes the effect of external environmental stimuli and local culture on land use in this region of Oregon. This study develops a classification system to describe how perceptions of Mount Hood have changed over time, and also investigates associated land use within each of these categories. Eight perception categories are employed: Reverence, Respect, Obstacle, Exploration, Livelihood, Economic Development, Conservation and Preservation, and Research. This historic landscape reconstruction employs comprehensive acceptance, integration, and comparison of various source materials to minimize bias. First, primary sources and commentary on these sources allow for an understanding of the local population’s general attitude toward the landscape. Second, perceptions of the local landscape were inferred through an analysis of land use activities. The various perceptions of the local population towards Mount Hood and the landscape within the Mount Hood Land Use Planning Unit Boundary have guided land use choices through time. These uses have resulted in significant changes to the landscape over the period of recorded history. Title: Historical landscape reconstruction and perceptual geography of Mount Hood, Oregon Author: Belgam, Daniel R. This research seeks to understand the influences of perception on land use around the Mount Hood area of Oregon and evaluate how it has evolved over the past 4,000 years. The study addresses three specific questions: 1) How has the study area evolved over time into the modern landscape? 2) What land use practices have developed in response to various public perceptions of Mount Hood? 3) How have the land uses impacted the landscape and physical environment? This in-depth analysis of the historic landscape describes the effect of external environmental stimuli and local culture on land use in this region of Oregon. This study develops a classification system to describe how perceptions of Mount Hood have changed over time, and also investigates associated land use within each of these categories. Eight perception categories are employed: Reverence, Respect, Obstacle, Exploration, Livelihood, Economic Development, Conservation and Preservation, and Research. This historic landscape reconstruction employs comprehensive acceptance, integration, and comparison of various source materials to minimize bias. First, primary sources and commentary on these sources allow for an understanding of the local population’s general attitude toward the landscape. Second, perceptions of the local landscape were inferred through an analysis of land use activities. The various perceptions of the local population towards Mount Hood and the landscape within the Mount Hood Land Use Planning Unit Boundary have guided land use choices through time. These uses have resulted in significant changes to the landscape over the period of recorded history. Close

• 30. [Article] Oregon's submerged and submersible lands ; a study of ownership history, conflicting claims of title [and] legislative recommendations

  While the public trust doctrine at common law placed effective limitations on the Crown, these limitations have been somewhat obscured by state court decisions in the United States. Though some courts ...

  Citation × Citation Citation Abstract Copy Title: Oregon's submerged and submersible lands ; a study of ownership history, conflicting claims of title [and] legislative recommendations Author: Oregon. Advisory Committee to the State Land Board. While the public trust doctrine at common law placed effective limitations on the Crown, these limitations have been somewhat obscured by state court decisions in the United States. Though some courts have suggested that the public trust places limitations or the power of the legislature to convey lands beneath navigable waters, this view conflicts with the basic theory of state government that recognizes plenary power in the state legislature to the extent that it is not constitutionally limited. The trust theory does, however, place definite restrictions on the state agency authorized to sell and maintain submerged and submersible lands. These restrictions arise from the basic presumption that the legislature will not intend a conveyance of lands in derogation of traditional public rights in the use and enjoyment of the waters, a presumption which stems from the inherent importance of the free navigability of the waters. Any land conveyed by the state, therefore, is and has been subject to the public right of navigation. However, though the grantee of the state takes subject to the public right of navigation, not every interference with that right will be enjoinable, since the test is one of public nuisance that involves a balancing of the conflicting interests. In conclusion, it would seem that the public trust doctrine still retains, vitality and continues to protect traditional rights in navigable waters. Title: Oregon's submerged and submersible lands ; a study of ownership history, conflicting claims of title [and] legislative recommendations Author: Oregon. Advisory Committee to the State Land Board. While the public trust doctrine at common law placed effective limitations on the Crown, these limitations have been somewhat obscured by state court decisions in the United States. Though some courts have suggested that the public trust places limitations or the power of the legislature to convey lands beneath navigable waters, this view conflicts with the basic theory of state government that recognizes plenary power in the state legislature to the extent that it is not constitutionally limited. The trust theory does, however, place definite restrictions on the state agency authorized to sell and maintain submerged and submersible lands. These restrictions arise from the basic presumption that the legislature will not intend a conveyance of lands in derogation of traditional public rights in the use and enjoyment of the waters, a presumption which stems from the inherent importance of the free navigability of the waters. Any land conveyed by the state, therefore, is and has been subject to the public right of navigation. However, though the grantee of the state takes subject to the public right of navigation, not every interference with that right will be enjoinable, since the test is one of public nuisance that involves a balancing of the conflicting interests. In conclusion, it would seem that the public trust doctrine still retains, vitality and continues to protect traditional rights in navigable waters. Close

• 31. [Article] Proving up and pulling out : archaeology and history of early 20th century homesteading in southwestern Oregon

  The Forest Homestead Act of 1906 precipitated one of the final rushes for free land in American history. A nascent land management agency, the USDA Forest Service, created a systematized process for the ...

  Citation × Citation Citation Abstract Copy Title: Proving up and pulling out : archaeology and history of early 20th century homesteading in southwestern Oregon Author: Lundgren, Stacy J. The Forest Homestead Act of 1906 precipitated one of the final rushes for free land in American history. A nascent land management agency, the USDA Forest Service, created a systematized process for the review and documentation of purported forest homestead claims. One hundred years later, the forest-homestead examination files of the then-Crater National Forest (now the Rogue River-Siskiyou National Forest) in southwestern Oregon provide an historical record that exposes the motivations and actions of numerous individuals as they negotiated the steps entailed in the public-land-disposal process. Archival research and archaeological survey form the dual methodological approaches to determine answers to several questions, among them: who were the people who attempted forest homesteading in a rugged mountainous setting, and what were their primary motivations?; what sort of housing did they fashion for themselves in the higher slopes of the Cascade Range and Siskiyou Mountains; where upon the land did they choose to place their habitation areas?; what were the spatial arrangements of those habitation areas?; and, what today is the nature of the archaeological record of the forest homesteading phenomenon of the early 20th century? This research indicates that the high-volume timber lands of the southern Cascades and the rugged Siskiyou Mountains proved a singular enticement to the residents of Jackson County, Oregon. Vernacular housing was typically the standby structure of the American 'pioneer' ---the log cabin---often ineptly built, sparsely furnished, and infrequently occupied. The would-be homesteaders' actual use of the land was light, often less than one per cent of the total 160 acres they each claimed. The archaeology and history of southwestern Oregon in the early 20th century demonstrates that forest homesteading was less an agricultural endeavor than a speculative pursuit to gain free land. And everyone---men and women, farmers and teachers, doctors and lawyers---wanted free land. Title: Proving up and pulling out : archaeology and history of early 20th century homesteading in southwestern Oregon Author: Lundgren, Stacy J. The Forest Homestead Act of 1906 precipitated one of the final rushes for free land in American history. A nascent land management agency, the USDA Forest Service, created a systematized process for the review and documentation of purported forest homestead claims. One hundred years later, the forest-homestead examination files of the then-Crater National Forest (now the Rogue River-Siskiyou National Forest) in southwestern Oregon provide an historical record that exposes the motivations and actions of numerous individuals as they negotiated the steps entailed in the public-land-disposal process. Archival research and archaeological survey form the dual methodological approaches to determine answers to several questions, among them: who were the people who attempted forest homesteading in a rugged mountainous setting, and what were their primary motivations?; what sort of housing did they fashion for themselves in the higher slopes of the Cascade Range and Siskiyou Mountains; where upon the land did they choose to place their habitation areas?; what were the spatial arrangements of those habitation areas?; and, what today is the nature of the archaeological record of the forest homesteading phenomenon of the early 20th century? This research indicates that the high-volume timber lands of the southern Cascades and the rugged Siskiyou Mountains proved a singular enticement to the residents of Jackson County, Oregon. Vernacular housing was typically the standby structure of the American 'pioneer' ---the log cabin---often ineptly built, sparsely furnished, and infrequently occupied. The would-be homesteaders' actual use of the land was light, often less than one per cent of the total 160 acres they each claimed. The archaeology and history of southwestern Oregon in the early 20th century demonstrates that forest homesteading was less an agricultural endeavor than a speculative pursuit to gain free land. And everyone---men and women, farmers and teachers, doctors and lawyers---wanted free land. Close

• 32. [Article] Detecting changes in a wetland : using multi-spectral and temporal Landsat in the Upper Noun Valley Drainage Basin-Cameroon

  Since the early 1980s, satellite imagery has been commonly used to detect change in wetlands. The overall objective of this study is to utilize remote sensing and Geographic Information Systems (GIS) technology ...

  Citation × Citation Citation Abstract Copy Title: Detecting changes in a wetland : using multi-spectral and temporal Landsat in the Upper Noun Valley Drainage Basin-Cameroon Author: Ndzeidze, Stephen Koghan Since the early 1980s, satellite imagery has been commonly used to detect change in wetlands. The overall objective of this study is to utilize remote sensing and Geographic Information Systems (GIS) technology to determine the extent of change of the wetland area and of other land use and land cover classes in the Upper Noun drainage basin from 1973 to 2007. Specific objectives were 1) to map land cover and related land use practices within the wetland and surrounding areas of the drainage basin using the supervised maximum likelihood algorithm classification method; 2) to map land use and land cover classes by seasons in order to determine human-induced pressure on the wetland area and the drainage basin using available Landsat MSS, TM and ETM+ imagery; 3) to utilize GIS in confirming and finalizing the land use and land cover classes and delimitation of the Upper Noun drainage basin by incorporating auxiliary data such as settlements and hydrology. The Upper Noun drainage basin is an important wetland that lies within the western high plateau of Cameroon where it supports a wide range of wildlife. The study defines twelve different land cover and land use classes that are grouped into four major categories. The first category is the humid floodplain class that makes up the wetland area, including the floodplain lake (1973), the reservoir, the permanent and seasonally flooded prairies, and irrigated farmlands. The second category consists of the agropastoral classes which are made of upland grazing areas and mixed farming areas. The third category is the montane and semi montane forest zone at elevations above 1,500 - 3,000 m. The fourth category is comprised of major settlements, and settlements with enclosures and openfields. This study is an example of an application of spatio-temporal data in assessing the close relationship existing between humans and their environment. This is a Sub Saharan African community that has a long history of direct dependence on the available resources for its daily livelihood. A detailed physical and historical background is presented to provide a context for spatio-temporal variation discovered through change detection using Landsat imagery without ground truth data. The data analysis reveals considerable change within the Upper Noun drainage basin from 1978 to 2002. Within the wetland area in the floodplain, the reservoir shows evidence of large fluctuations in area since the construction of the Bamendjin dam in 1975. Within the reservoir area, an acute siltation has been observed since 1988 and is increasing in area. A significant drop in area of permanent and seasonally flooded prairies was observed. Irrigated farmland areas also show downward trends from 1988 to 2002. Concerning the agropastoral landscape, the upland grazing areas showed a general drop in area, while the mixed farming area increased from 1978 to 2002. The montane forest also decreased in area; however, it appeared to have recovered slightly in 2002 following the successful implementation of the Kilum/Ijim community forest management project. Settlement also showed some expansion in area as a result of growth of most enclosures and openfields to larger villages and major settlements. This study thus provides base data for monitoring human impacts on the Upper Noun drainage basin and its natural habitats, especially within and around the wetland. Title: Detecting changes in a wetland : using multi-spectral and temporal Landsat in the Upper Noun Valley Drainage Basin-Cameroon Author: Ndzeidze, Stephen Koghan Since the early 1980s, satellite imagery has been commonly used to detect change in wetlands. The overall objective of this study is to utilize remote sensing and Geographic Information Systems (GIS) technology to determine the extent of change of the wetland area and of other land use and land cover classes in the Upper Noun drainage basin from 1973 to 2007. Specific objectives were 1) to map land cover and related land use practices within the wetland and surrounding areas of the drainage basin using the supervised maximum likelihood algorithm classification method; 2) to map land use and land cover classes by seasons in order to determine human-induced pressure on the wetland area and the drainage basin using available Landsat MSS, TM and ETM+ imagery; 3) to utilize GIS in confirming and finalizing the land use and land cover classes and delimitation of the Upper Noun drainage basin by incorporating auxiliary data such as settlements and hydrology. The Upper Noun drainage basin is an important wetland that lies within the western high plateau of Cameroon where it supports a wide range of wildlife. The study defines twelve different land cover and land use classes that are grouped into four major categories. The first category is the humid floodplain class that makes up the wetland area, including the floodplain lake (1973), the reservoir, the permanent and seasonally flooded prairies, and irrigated farmlands. The second category consists of the agropastoral classes which are made of upland grazing areas and mixed farming areas. The third category is the montane and semi montane forest zone at elevations above 1,500 - 3,000 m. The fourth category is comprised of major settlements, and settlements with enclosures and openfields. This study is an example of an application of spatio-temporal data in assessing the close relationship existing between humans and their environment. This is a Sub Saharan African community that has a long history of direct dependence on the available resources for its daily livelihood. A detailed physical and historical background is presented to provide a context for spatio-temporal variation discovered through change detection using Landsat imagery without ground truth data. The data analysis reveals considerable change within the Upper Noun drainage basin from 1978 to 2002. Within the wetland area in the floodplain, the reservoir shows evidence of large fluctuations in area since the construction of the Bamendjin dam in 1975. Within the reservoir area, an acute siltation has been observed since 1988 and is increasing in area. A significant drop in area of permanent and seasonally flooded prairies was observed. Irrigated farmland areas also show downward trends from 1988 to 2002. Concerning the agropastoral landscape, the upland grazing areas showed a general drop in area, while the mixed farming area increased from 1978 to 2002. The montane forest also decreased in area; however, it appeared to have recovered slightly in 2002 following the successful implementation of the Kilum/Ijim community forest management project. Settlement also showed some expansion in area as a result of growth of most enclosures and openfields to larger villages and major settlements. This study thus provides base data for monitoring human impacts on the Upper Noun drainage basin and its natural habitats, especially within and around the wetland. Close

• 33. [Article] Livelihoods and land use change in highland Ethiopia

  This dissertation investigates livelihood and land use change dynamics in a community at the farm-forest periphery in highland Ethiopia. I use interviews and livelihood assessment data to compare the strategies ...

  Citation × Citation Citation Abstract Copy Title: Livelihoods and land use change in highland Ethiopia Author: Guillozet, Kathleen This dissertation investigates livelihood and land use change dynamics in a community at the farm-forest periphery in highland Ethiopia. I use interviews and livelihood assessment data to compare the strategies used by members of different wealth groups to negotiate and maintain access to forest resources, and integrate socioeconomic, bio-physical and spatially explicit data to examine changing land use and household vulnerability. This approach sheds new light on scalar aspects of poverty-environment relationships with implications for environmental justice and rural development policy. Chapter one provides an overview of the context and approach to this research. Chapter two illustrates the importance of scale in understanding household vulnerability. It uses diverse data to describe political, historic, biophysical and economic factors that shape vulnerability. Chapter three describes household livelihoods and increasing foreign investment pressure in Ethiopia's natural forests, with an emphasis on the history of forest management and access in the study site. It describes processes of forest boundary making and conflict in the study area. Chapter four outlines two scenarios to describe the amount of agricultural land required to replace forest incomes in the community under study. These scenarios, termed "fuelwood replacement" and "fuelwood replacement with agricultural intensification," use agricultural land as a proxy for fuelwood incomes, retaining the connection to physical space that is inherent to natural resources, rather than presenting abstracted monetary values that disassociate resources from power and access dynamics. Chapter five draws together unifying ideas, outlines policy recommendations and describes areas for future research. Title: Livelihoods and land use change in highland Ethiopia Author: Guillozet, Kathleen This dissertation investigates livelihood and land use change dynamics in a community at the farm-forest periphery in highland Ethiopia. I use interviews and livelihood assessment data to compare the strategies used by members of different wealth groups to negotiate and maintain access to forest resources, and integrate socioeconomic, bio-physical and spatially explicit data to examine changing land use and household vulnerability. This approach sheds new light on scalar aspects of poverty-environment relationships with implications for environmental justice and rural development policy. Chapter one provides an overview of the context and approach to this research. Chapter two illustrates the importance of scale in understanding household vulnerability. It uses diverse data to describe political, historic, biophysical and economic factors that shape vulnerability. Chapter three describes household livelihoods and increasing foreign investment pressure in Ethiopia's natural forests, with an emphasis on the history of forest management and access in the study site. It describes processes of forest boundary making and conflict in the study area. Chapter four outlines two scenarios to describe the amount of agricultural land required to replace forest incomes in the community under study. These scenarios, termed "fuelwood replacement" and "fuelwood replacement with agricultural intensification," use agricultural land as a proxy for fuelwood incomes, retaining the connection to physical space that is inherent to natural resources, rather than presenting abstracted monetary values that disassociate resources from power and access dynamics. Chapter five draws together unifying ideas, outlines policy recommendations and describes areas for future research. Close

• 34. [Article] The Bob Marshall Wilderness Area of Montana ; a study in land use

  A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, ...

  Citation × Citation Citation Abstract Copy Title: The Bob Marshall Wilderness Area of Montana ; a study in land use Author: Merriam, Lawrence C. A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, hotels, stores, and similar developments are prohibited. While there are some exceptions for private holdings and administrative uses, management policy is directed toward the maintenance of primeval conditions. When wilderness reservations were first made (as primitive areas) in the late 1920's and 1930's, resource use demands were limited and these areas were mostly inaccessible backcountry by-passed in the development of the United States. Since World War 11 pressure for expanded development and use of national forest lands for both commercial and preservation management has increased. Interest in national forest land use problems has become nationwide in scope. The Forest Service, while rapidly expanding forest development for utilitarian purposed under its multiple use policy, and serving both local and national interests, has faced increasingly complicated situations in the administrative reservation of wilderness lands from which utilitarian uses are excluded. This situation has been further complicated by the differences of management approaches and personnel training needed in the stewardship of regular national forest and wilderness lands. The Bob Marshall Wilderness Area, 950,000 publicly owned, wilderness classified acres situated in the Flathead and Lewis and Clark National Forests of Montana, is the subject of this land use study to determine its best socio-economic use in the year 1960. Continued public ownership of the land and the perpetuation of wilderness reservation is assumed. The area, its history and evolution, is described. The role of other public agencies, commercial guides, and land use problems are presented. Literature pertinent to wilderness philosophy, management, and recreation valuation is reviewed. Field studies covered several years, including the 1960 nation-wide study for the Outdoor Recreation Resources Review Commission on wilderness and its users. Users were found to be primarily horse travelers, generally in the upper socio-economic classes of society. They were opposed to utilitarian uses and development of the Area and generally favored agency regulation of wilderness. Their primary motivations for visiting the Wilderness were to escape from the pressure of modern civilization and to enjoy the beauties of nature. They were amenable to the charging of yearly fees for wilderness preservation. Summer users were divided into three main groups by origin and activities. Two of these were from Montana and the third from out of state. For this 1960 economic analysis of resource uses, isolation recreation under wilderness reservation was compared with developed recreation and hypothetical timber production under full-development multiple use. Other national forest uses including water, wildlife, and forage, were assumed to be neutral. Two conjectural timber sales, evolved by using Forest Service appraisal methods, proved uneconomic. Assuming road development by federal appropriation, public costs and returns were compared with developed resource uses. In terms of least public cost it was shown that the public interest was best served in 1960 by reserving the Bob Marshall Area as wilderness. Under wilderness reservation, it was found that user benefits would equal 1960 public costs with a reasonable per day user charge. Recreation was valued indirectly. Aesthetic and vicarious aspects were not analyzed. Over time demand will grow for commercial resources in the Wilderness, as will recreation use of the Area. Conflicts will increase and intensify. The Area will become unique as surrounding backcountry is developed. Wilderness as a resource serves a recreational user clientele in addition to regular forest resource users. Forest Service, personnel training related to wilderness concepts and informational-interpretive approaches to the public are important in obtaining nationwide public support for wilderness reservation. Title: The Bob Marshall Wilderness Area of Montana ; a study in land use Author: Merriam, Lawrence C. A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, hotels, stores, and similar developments are prohibited. While there are some exceptions for private holdings and administrative uses, management policy is directed toward the maintenance of primeval conditions. When wilderness reservations were first made (as primitive areas) in the late 1920's and 1930's, resource use demands were limited and these areas were mostly inaccessible backcountry by-passed in the development of the United States. Since World War 11 pressure for expanded development and use of national forest lands for both commercial and preservation management has increased. Interest in national forest land use problems has become nationwide in scope. The Forest Service, while rapidly expanding forest development for utilitarian purposed under its multiple use policy, and serving both local and national interests, has faced increasingly complicated situations in the administrative reservation of wilderness lands from which utilitarian uses are excluded. This situation has been further complicated by the differences of management approaches and personnel training needed in the stewardship of regular national forest and wilderness lands. The Bob Marshall Wilderness Area, 950,000 publicly owned, wilderness classified acres situated in the Flathead and Lewis and Clark National Forests of Montana, is the subject of this land use study to determine its best socio-economic use in the year 1960. Continued public ownership of the land and the perpetuation of wilderness reservation is assumed. The area, its history and evolution, is described. The role of other public agencies, commercial guides, and land use problems are presented. Literature pertinent to wilderness philosophy, management, and recreation valuation is reviewed. Field studies covered several years, including the 1960 nation-wide study for the Outdoor Recreation Resources Review Commission on wilderness and its users. Users were found to be primarily horse travelers, generally in the upper socio-economic classes of society. They were opposed to utilitarian uses and development of the Area and generally favored agency regulation of wilderness. Their primary motivations for visiting the Wilderness were to escape from the pressure of modern civilization and to enjoy the beauties of nature. They were amenable to the charging of yearly fees for wilderness preservation. Summer users were divided into three main groups by origin and activities. Two of these were from Montana and the third from out of state. For this 1960 economic analysis of resource uses, isolation recreation under wilderness reservation was compared with developed recreation and hypothetical timber production under full-development multiple use. Other national forest uses including water, wildlife, and forage, were assumed to be neutral. Two conjectural timber sales, evolved by using Forest Service appraisal methods, proved uneconomic. Assuming road development by federal appropriation, public costs and returns were compared with developed resource uses. In terms of least public cost it was shown that the public interest was best served in 1960 by reserving the Bob Marshall Area as wilderness. Under wilderness reservation, it was found that user benefits would equal 1960 public costs with a reasonable per day user charge. Recreation was valued indirectly. Aesthetic and vicarious aspects were not analyzed. Over time demand will grow for commercial resources in the Wilderness, as will recreation use of the Area. Conflicts will increase and intensify. The Area will become unique as surrounding backcountry is developed. Wilderness as a resource serves a recreational user clientele in addition to regular forest resource users. Forest Service, personnel training related to wilderness concepts and informational-interpretive approaches to the public are important in obtaining nationwide public support for wilderness reservation. Close

• 35. [Article] The great fires : Indian burning and catastrophic forest fire patterns of the Oregon Coast Range, 1491-1951

  The purpose of this study is to examine the relationship between land management practices of Indian communities prior to contact with Europeans and the nature or character of subsequent catastrophic forest fires ...

  Citation × Citation Citation Abstract Copy Title: The great fires : Indian burning and catastrophic forest fire patterns of the Oregon Coast Range, 1491-1951 Author: Zybach, Bob The purpose of this study is to examine the relationship between land management practices of Indian communities prior to contact with Europeans and the nature or character of subsequent catastrophic forest fires in the Oregon Coast Range. The research focus is spatial and temporal patterns of Indian burning across the landscape from 1491 until 1848, and corresponding patterns of catastrophic fire events from 1849 until 1951. Archival and anthropological research methods were used to obtain early surveys, maps, drawings, photographs, interviews, Geographic Information Systems (GIS) inventories, eyewitness accounts and other sources of evidence that document fire history. Data were tabulated, mapped, and digitized as new GIS layers for purposes of comparative analysis. An abundance of historical evidence was found to exist that is useful for reconstructing precontact vegetation patterns and human burning practices in western Oregon. The data also proved useful for documenting local and regional forest fire histories. Precontact Indians used fire to produce landscape patterns of trails, patches, fields, woodlands, forests and grasslands that varied from time to time and place to place, partly due to demographic, cultural, topographic, and climatic differences that existed throughout the Coast Range. Native plants were systematically managed by local Indian families in even-aged stands, usually dominated by a single species, throughout all river basins of the study area. Oak, filberts, camas, wapato, tarweed, yampah, strawberries, huckleberries, brackenfern, nettles, and other plants were raised in select areas by all known tribes, over long periods of time. However, current scientific and policy assumptions regarding the abundance and extent of precontact western Oregon old-growth forests may be in error. This study demonstrates a high rate of coincidence between the land management practices of precontact Indian communities, and the causes, timing, boundaries, severity, and extent of subsequent catastrophic forest fires in the same areas. Information provided by this study should be of value to researchers, wildlife managers, forest landowners, and others with an interest in the history and resources of the Oregon Coast Range. Title: The great fires : Indian burning and catastrophic forest fire patterns of the Oregon Coast Range, 1491-1951 Author: Zybach, Bob The purpose of this study is to examine the relationship between land management practices of Indian communities prior to contact with Europeans and the nature or character of subsequent catastrophic forest fires in the Oregon Coast Range. The research focus is spatial and temporal patterns of Indian burning across the landscape from 1491 until 1848, and corresponding patterns of catastrophic fire events from 1849 until 1951. Archival and anthropological research methods were used to obtain early surveys, maps, drawings, photographs, interviews, Geographic Information Systems (GIS) inventories, eyewitness accounts and other sources of evidence that document fire history. Data were tabulated, mapped, and digitized as new GIS layers for purposes of comparative analysis. An abundance of historical evidence was found to exist that is useful for reconstructing precontact vegetation patterns and human burning practices in western Oregon. The data also proved useful for documenting local and regional forest fire histories. Precontact Indians used fire to produce landscape patterns of trails, patches, fields, woodlands, forests and grasslands that varied from time to time and place to place, partly due to demographic, cultural, topographic, and climatic differences that existed throughout the Coast Range. Native plants were systematically managed by local Indian families in even-aged stands, usually dominated by a single species, throughout all river basins of the study area. Oak, filberts, camas, wapato, tarweed, yampah, strawberries, huckleberries, brackenfern, nettles, and other plants were raised in select areas by all known tribes, over long periods of time. However, current scientific and policy assumptions regarding the abundance and extent of precontact western Oregon old-growth forests may be in error. This study demonstrates a high rate of coincidence between the land management practices of precontact Indian communities, and the causes, timing, boundaries, severity, and extent of subsequent catastrophic forest fires in the same areas. Information provided by this study should be of value to researchers, wildlife managers, forest landowners, and others with an interest in the history and resources of the Oregon Coast Range. Close

• 36. [Article] The history of the Oregon and California railroad land grant

  Citation × Citation Citation Abstract Copy Title: The history of the Oregon and California railroad land grant Author: Ottoman, Robert L. Title: The history of the Oregon and California railroad land grant Author: Ottoman, Robert L. Close

• 37. [Article] Make it Rain : A Lagrangian Approach to Investigate Land Surface Controls on Moisture Recycling in the Columbia River Basin

  Linkages between land use and its influence on the atmosphere have been a long-standing research area. For example, what is the impact of irrigated agriculture on downwind rainfall? Global-scale models ...

  Citation × Citation Citation Abstract Copy Title: Make it Rain : A Lagrangian Approach to Investigate Land Surface Controls on Moisture Recycling in the Columbia River Basin Author: Tai, Leah Chung-Mei Linkages between land use and its influence on the atmosphere have been a long-standing research area. For example, what is the impact of irrigated agriculture on downwind rainfall? Global-scale models show that moisture recycling is an important source of water for inland regions around the world, but they do not resolve land surface characteristics that may affect recycling ratios. Observational studies at the local scale report both increased and decreased rainfall likelihood as a result of deforestation. I present a Lagrangian framework based on biophysical land - atmosphere interactions to estimate the influence of land cover on the spatial and temporal scale of rainfall recycling. My results demonstrate that convective rainfall conditions occur more frequently over coniferous forests and irrigated crops relative to bare soils and mixed-use land cover. The increased likelihood of rainfall over vegetated surfaces is caused by the response of the atmospheric boundary layer to high water vapor fluxes from evapotranspiration and the partitioning of available energy at the ground surface. The presence of vegetation causes large variability in rainfall likelihood, but free atmosphere conditions are found to be the primary controls on rainfall initiation. Multi-day model simulations suggest that an initially dry atmosphere will experience rainfall recycling along a Lagrangian trajectory every 2 to 3 days over a completely vegetated surface and every 12 days over bare soils. Application of my model focused on the lower Columbia Basin because it is a major source region of continental evaporation and has a history of dramatic change in land use. The increased rainfall trends observed over the 20th century in the lower Columbia Basin cannot be significantly associated with land use changes, but modeled estimates suggest an increase in rainfall likelihood of less than 9% from the change in land cover this region has experienced. The results of this simple physically-based model can be used to quantify the effects of land cover on moisture recycling to better understand processes influencing rainfall patterns at regional scales. Title: Make it Rain : A Lagrangian Approach to Investigate Land Surface Controls on Moisture Recycling in the Columbia River Basin Author: Tai, Leah Chung-Mei Linkages between land use and its influence on the atmosphere have been a long-standing research area. For example, what is the impact of irrigated agriculture on downwind rainfall? Global-scale models show that moisture recycling is an important source of water for inland regions around the world, but they do not resolve land surface characteristics that may affect recycling ratios. Observational studies at the local scale report both increased and decreased rainfall likelihood as a result of deforestation. I present a Lagrangian framework based on biophysical land - atmosphere interactions to estimate the influence of land cover on the spatial and temporal scale of rainfall recycling. My results demonstrate that convective rainfall conditions occur more frequently over coniferous forests and irrigated crops relative to bare soils and mixed-use land cover. The increased likelihood of rainfall over vegetated surfaces is caused by the response of the atmospheric boundary layer to high water vapor fluxes from evapotranspiration and the partitioning of available energy at the ground surface. The presence of vegetation causes large variability in rainfall likelihood, but free atmosphere conditions are found to be the primary controls on rainfall initiation. Multi-day model simulations suggest that an initially dry atmosphere will experience rainfall recycling along a Lagrangian trajectory every 2 to 3 days over a completely vegetated surface and every 12 days over bare soils. Application of my model focused on the lower Columbia Basin because it is a major source region of continental evaporation and has a history of dramatic change in land use. The increased rainfall trends observed over the 20th century in the lower Columbia Basin cannot be significantly associated with land use changes, but modeled estimates suggest an increase in rainfall likelihood of less than 9% from the change in land cover this region has experienced. The results of this simple physically-based model can be used to quantify the effects of land cover on moisture recycling to better understand processes influencing rainfall patterns at regional scales. Close

• 38. [Article] Collaborative Conservation Strategies: Legislative Case Studies from Across the West

  Executive Summary: As the 2005-06 Chair of the Western Governors' Association, Arizona Governor Janet Napolitano placed special emphasis on issues surrounding sustainable development. As part of that initiative, ...

  Citation × Citation Citation Abstract Copy Title: Collaborative Conservation Strategies: Legislative Case Studies from Across the West Author: Western Governors' Association Executive Summary: As the 2005-06 Chair of the Western Governors' Association, Arizona Governor Janet Napolitano placed special emphasis on issues surrounding sustainable development. As part of that initiative, she directed WGA staff to develop a white paper on the use of negotiated compromise federal legislation as a tool both to protect unique and sensitive lands in the West and to address growth and economic development issues faced by local communities. Western states contain the vast majority of publicly owned lands. Management of these lands impact the social and economic fabric of adjacent rural Western communities. As much of the West continues experiencing unprecedented population growth, the traditional tension between growth and preservation has escalated for these lands and the communities. This white paper traces the history of land conservation in the West and the seeds of collaborative approaches reaching back to federal statutes enacted in the 1960s. The case studies show how traditional adversaries in three Western communities were able to avoid impasse and come together to hammer out difficult compromises to accommodate most interests. Success has not been fully realized in all cases, but the difficult work continues. There are those on both sides who believe compromising with “the enemy” on conservation and development is tantamount to surrender. However, as the West keeps growing, the pressure will mount to negotiate solutions on the conservation and development of land and water supplies for traditional and new uses. Negotiated, omnibus legislation for public lands is one of the new tools that can help. This approach requires undaunted leadership, (a strong motivating factor to get parties to the table), a level playing field during the collaborative process, and an outcome that has enough support to weather the federal legislative process. Western Governors are uniquely poised to identify opportunities in their respective states, help initiate a truly collaborative process, and stand with their Congressional counterparts if a bill moves through Congress. It is a leadership role that they have played in other arenas and would likely be welcomed by communities and advocates alike. Title: Collaborative Conservation Strategies: Legislative Case Studies from Across the West Author: Western Governors' Association Executive Summary: As the 2005-06 Chair of the Western Governors' Association, Arizona Governor Janet Napolitano placed special emphasis on issues surrounding sustainable development. As part of that initiative, she directed WGA staff to develop a white paper on the use of negotiated compromise federal legislation as a tool both to protect unique and sensitive lands in the West and to address growth and economic development issues faced by local communities. Western states contain the vast majority of publicly owned lands. Management of these lands impact the social and economic fabric of adjacent rural Western communities. As much of the West continues experiencing unprecedented population growth, the traditional tension between growth and preservation has escalated for these lands and the communities. This white paper traces the history of land conservation in the West and the seeds of collaborative approaches reaching back to federal statutes enacted in the 1960s. The case studies show how traditional adversaries in three Western communities were able to avoid impasse and come together to hammer out difficult compromises to accommodate most interests. Success has not been fully realized in all cases, but the difficult work continues. There are those on both sides who believe compromising with “the enemy” on conservation and development is tantamount to surrender. However, as the West keeps growing, the pressure will mount to negotiate solutions on the conservation and development of land and water supplies for traditional and new uses. Negotiated, omnibus legislation for public lands is one of the new tools that can help. This approach requires undaunted leadership, (a strong motivating factor to get parties to the table), a level playing field during the collaborative process, and an outcome that has enough support to weather the federal legislative process. Western Governors are uniquely poised to identify opportunities in their respective states, help initiate a truly collaborative process, and stand with their Congressional counterparts if a bill moves through Congress. It is a leadership role that they have played in other arenas and would likely be welcomed by communities and advocates alike. Close

• 39. [Article] The Great Hall: A Story of Promise, Lost Opportunity, and the Value of the Liberal Arts

  The liberal arts have always struggled to find their place in the technically oriented land-grant university. Land-grant universities were tasked by the 1862 Morrill Act with providing both a practical ...

  Citation × Citation Citation Abstract Copy Title: The Great Hall: A Story of Promise, Lost Opportunity, and the Value of the Liberal Arts Author: Proctor, Jenna Marie The liberal arts have always struggled to find their place in the technically oriented land-grant university. Land-grant universities were tasked by the 1862 Morrill Act with providing both a practical and liberal education for all students. The liberal arts, however, were quickly sidelined from this dual purpose with the increasing emphasis placed on the practical arts during the two world wars. This thesis narrates the struggle of the liberal arts at Oregon State University to achieve equality with the practical arts on the basis of their intrinsic benefits to society instead of merely as a utilitarian servant to fields yielding tangible developments. As a case study, this thesis uses the story of the Great Hall: a large performing arts center that was slated to be built on the OSU campus during the late 1970’s using donations raised by the OSU Foundation. Although the Great Hall was ultimately too grand and expensive for its time, the great promise and potential of the building serves as a window into how the liberal arts have been and continue to be perceived and prioritized in land-grant universities, as well as how society values the arts and culture in relation to practical development. Title: The Great Hall: A Story of Promise, Lost Opportunity, and the Value of the Liberal Arts Author: Proctor, Jenna Marie The liberal arts have always struggled to find their place in the technically oriented land-grant university. Land-grant universities were tasked by the 1862 Morrill Act with providing both a practical and liberal education for all students. The liberal arts, however, were quickly sidelined from this dual purpose with the increasing emphasis placed on the practical arts during the two world wars. This thesis narrates the struggle of the liberal arts at Oregon State University to achieve equality with the practical arts on the basis of their intrinsic benefits to society instead of merely as a utilitarian servant to fields yielding tangible developments. As a case study, this thesis uses the story of the Great Hall: a large performing arts center that was slated to be built on the OSU campus during the late 1970’s using donations raised by the OSU Foundation. Although the Great Hall was ultimately too grand and expensive for its time, the great promise and potential of the building serves as a window into how the liberal arts have been and continue to be perceived and prioritized in land-grant universities, as well as how society values the arts and culture in relation to practical development. Close

• 40. [Article] An evaluation of the resources of the Mosquitia Region of Honduras by means of Remote Sensing and GIS

  The Mosquitia Region of Honduras is part of the largest wilderness area in Central America. In terms of biodiversity the area is rich in ecosystems including pine savannas, tropical rain forests, and wetlands. ...

  Citation × Citation Citation Abstract Copy Title: An evaluation of the resources of the Mosquitia Region of Honduras by means of Remote Sensing and GIS Author: Torres, Juan Carlos The Mosquitia Region of Honduras is part of the largest wilderness area in Central America. In terms of biodiversity the area is rich in ecosystems including pine savannas, tropical rain forests, and wetlands. These ecosystems are rich in millions of species including rare and endangered. Honduras faces an economic, social, and political crisis without precedent in its history. A lot of the crisis has to do with resource allocation and land tenure. Most of the land well suited for agriculture is concentrated in a few hands. The Mosquitia Region is seen as the last frontier by thousands of landless farmers coming from the poor and eroded lands of southern Honduras. This study evaluates the impact of deforestation due to subsistence and extensive agriculture in the areas around and inside the Mosquitia Region by means of remote sensing and GIS. A change detection analysis is carried out for the years of 1965, 1986-89, and 1995 using land use maps, topographic maps, and LANDSAT TM data. In addition the study examines the relationship between proximity to rivers and deforestation. The study concludes that significant and accelerated change is taking place in the study region, and that there is a linear relationship between proximity to rivers and deforestation. Title: An evaluation of the resources of the Mosquitia Region of Honduras by means of Remote Sensing and GIS Author: Torres, Juan Carlos The Mosquitia Region of Honduras is part of the largest wilderness area in Central America. In terms of biodiversity the area is rich in ecosystems including pine savannas, tropical rain forests, and wetlands. These ecosystems are rich in millions of species including rare and endangered. Honduras faces an economic, social, and political crisis without precedent in its history. A lot of the crisis has to do with resource allocation and land tenure. Most of the land well suited for agriculture is concentrated in a few hands. The Mosquitia Region is seen as the last frontier by thousands of landless farmers coming from the poor and eroded lands of southern Honduras. This study evaluates the impact of deforestation due to subsistence and extensive agriculture in the areas around and inside the Mosquitia Region by means of remote sensing and GIS. A change detection analysis is carried out for the years of 1965, 1986-89, and 1995 using land use maps, topographic maps, and LANDSAT TM data. In addition the study examines the relationship between proximity to rivers and deforestation. The study concludes that significant and accelerated change is taking place in the study region, and that there is a linear relationship between proximity to rivers and deforestation. Close

• 41. [Article] Supplemental comments to Oregon Task Force on Land Use Planning

  Citation × Citation Citation Abstract Copy Title: Supplemental comments to Oregon Task Force on Land Use Planning Author: American Land Institute, Richmond, Henry R, Title: Supplemental comments to Oregon Task Force on Land Use Planning Author: American Land Institute, Richmond, Henry R, Close

• 42. [Article] Land use and land-use change in the Rocky Mountain west

  Private land-use decisions can have important effects on private and public welfare. Market-based policies to regulate land use have the potential to move the privately-optimal allocation of land closer ...

  Citation × Citation Citation Abstract Copy Title: Land use and land-use change in the Rocky Mountain west Author: Broniak, Christine T. Private land-use decisions can have important effects on private and public welfare. Market-based policies to regulate land use have the potential to move the privately-optimal allocation of land closer to what is socially optimal. To implement these policies in the Rocky Mountain states, it is necessary to understand the effects of private net returns on landowner choices. Two types of models are estimated to investigate these effects. The first is a conditional logit model. Here, parcel-level land-use choices are modeled in response to net returns, land quality, and other variables. The second is an area base model estimated using county aggregate land-use data. A generalized least squares model is estimated to adjust for heteroskedasticity that results from the specification. Land-use shares and transitions are dependent variables, while net returns, land quality, temperature, elevation, precipitation, and hospitality sector sales are the independent variables. For the aggregate land-use transition model, a specification that normalized net returns on range net returns returned all of the expected results. Results for both types of models suggest that it is necessary to control for land-use heterogeneity in this region by adding variables such as temperature, precipitation, and elevation. The Rocky Mountain region has more heterogeneous conditions than most other regions of the United States. With its vast areas of relatively low-value range land, this region offers promise for low-cost land conversion policies, but further research is necessary to understand the influence of a heterogeneous environment on land-use decisions. Title: Land use and land-use change in the Rocky Mountain west Author: Broniak, Christine T. Private land-use decisions can have important effects on private and public welfare. Market-based policies to regulate land use have the potential to move the privately-optimal allocation of land closer to what is socially optimal. To implement these policies in the Rocky Mountain states, it is necessary to understand the effects of private net returns on landowner choices. Two types of models are estimated to investigate these effects. The first is a conditional logit model. Here, parcel-level land-use choices are modeled in response to net returns, land quality, and other variables. The second is an area base model estimated using county aggregate land-use data. A generalized least squares model is estimated to adjust for heteroskedasticity that results from the specification. Land-use shares and transitions are dependent variables, while net returns, land quality, temperature, elevation, precipitation, and hospitality sector sales are the independent variables. For the aggregate land-use transition model, a specification that normalized net returns on range net returns returned all of the expected results. Results for both types of models suggest that it is necessary to control for land-use heterogeneity in this region by adding variables such as temperature, precipitation, and elevation. The Rocky Mountain region has more heterogeneous conditions than most other regions of the United States. With its vast areas of relatively low-value range land, this region offers promise for low-cost land conversion policies, but further research is necessary to understand the influence of a heterogeneous environment on land-use decisions. Close

• 43. [Article] Forests, farms & people: Land use change on non-federal land in Oregon 1974-2014

  Oregon has done remarkably well in preserving forests, farms, and rangeland from development. Ninety-seven percent of all non-Federal land in Oregon that was in resource land uses in 1974 remained in those ...

  Citation × Citation Citation Abstract Copy Title: Forests, farms & people: Land use change on non-federal land in Oregon 1974-2014 Author: Hubner, Dan, McKay, Neil, Gray, Andrew N., Lettman, Gary J., Thompson, Joel L. Oregon has done remarkably well in preserving forests, farms, and rangeland from development. Ninety-seven percent of all non-Federal land in Oregon that was in resource land uses in 1974 remained in those uses in 2014. Ninety-nine percent of all non-Federal land in Oregon that was in resource land uses in 1984, after comprehensive land use plans were implemented, remained in these uses in 2014. With the housing industry still reeling from the 2007 financial crisis and subsequent Great Recession, development of resource lands in Oregon hit a record low between 2009 and 2014. Development of resource land to low-density residential or urban uses is consistent with land use goals, plans, and zoning. Most development of resource lands occurs adjacent or close to existing developed areas, thereby minimizing development scattered though Oregon’s forests and farm lands. Structures continue to be built on lands remaining in forest, agricultural, and range uses at high rates, even after the implementation of county comprehensive land use plans. However, the impact of these additional structures on management of Oregon’s resource lands is lessened because most of the structures built are relatively close to land in low-density residential or urban uses. It is notable that for land in wildland forest use owned by forest industry and non-Federal public owners, both the rate of development of wildland forest to low-density residential and urban uses and the number of structures built on land remaining in wildland forest use remained low over the study period. Most development of land in wildland forest use occurred on other private (non-industrial) ownerships. Title: Forests, farms & people: Land use change on non-federal land in Oregon 1974-2014 Author: Hubner, Dan, McKay, Neil, Gray, Andrew N., Lettman, Gary J., Thompson, Joel L. Oregon has done remarkably well in preserving forests, farms, and rangeland from development. Ninety-seven percent of all non-Federal land in Oregon that was in resource land uses in 1974 remained in those uses in 2014. Ninety-nine percent of all non-Federal land in Oregon that was in resource land uses in 1984, after comprehensive land use plans were implemented, remained in these uses in 2014. With the housing industry still reeling from the 2007 financial crisis and subsequent Great Recession, development of resource lands in Oregon hit a record low between 2009 and 2014. Development of resource land to low-density residential or urban uses is consistent with land use goals, plans, and zoning. Most development of resource lands occurs adjacent or close to existing developed areas, thereby minimizing development scattered though Oregon’s forests and farm lands. Structures continue to be built on lands remaining in forest, agricultural, and range uses at high rates, even after the implementation of county comprehensive land use plans. However, the impact of these additional structures on management of Oregon’s resource lands is lessened because most of the structures built are relatively close to land in low-density residential or urban uses. It is notable that for land in wildland forest use owned by forest industry and non-Federal public owners, both the rate of development of wildland forest to low-density residential and urban uses and the number of structures built on land remaining in wildland forest use remained low over the study period. Most development of land in wildland forest use occurred on other private (non-industrial) ownerships. Close

• 44. [Article] Disturbance and landscape history as a reference for evaluating forest management effects at a regional scale : examples from the Coast Range of Oregon, USA

  History is an invaluable source of information to understand and evaluate management influences on contemporary ecosystems and landscapes. The first two chapters (Chapters 2 and 3) explored the concept ...

  Citation × Citation Citation Abstract Copy Title: Disturbance and landscape history as a reference for evaluating forest management effects at a regional scale : examples from the Coast Range of Oregon, USA Author: Nonaka, Etsuko History is an invaluable source of information to understand and evaluate management influences on contemporary ecosystems and landscapes. The first two chapters (Chapters 2 and 3) explored the concept of historical range of variability (HRV) in landscape structure and stand structure using a stochastic fire simulation model to simulate presettlement (before 1850) landscapes of the Oregon Coast Range. HRV has been defined as the bounded variability of a system within constraints imposed by larger-scale phenomena (e.g. climate, topography) and without significant modern human influence. HRV of landscapes has been proposed as a guide for biodiversity conservation in the past decade. In Chapter 2, I estimated HRV of a regional landscape and evaluated the similarity of current and alternative future landscapes under two land management scenarios to the conditions within the HRV. The simulation results indicated that historical landscapes of the region were dynamic, composed of patches of various sizes and age classes ranging from 0 to> 800 years as well as numerous small unburned island patches. The current landscape was outside the HRV. The landscape did not return to the HRV in 100 years under either scenario largely because of lack of old-growth forests and overabundance of young forests. This study showed that the HRV can provide a reference condition for concrete, quantitative evaluations of landscape conditions and alternative management scenarios if sufficient data exist for estimating HRV. Departure from HRV can serve as an indicator of landscape conditions, but results depend on scale and quantification of landscape heterogeneity. In Chapter 3, I investigated the HRV in live and dead biomass and examined variability in disturbance history and forest stand development. I calculated biomass as a function of disturbance history. The HRV of live and dead wood biomass distributions revealed that the majority of the landscape historically contained > 500 Mg/ha of live wood and 50-200 Mg/ha of dead wood. The current dead wood condition is outside HRV. There was a wide variation in dead wood biomass because of variations in disturbance history. This study suggests that natural disturbance regimes and stand development are characterized by much larger variation than is typically portrayed or appreciated. The HRV approaches to evaluating landscape conditions need to include both landscape and stand characteristics to better represent ecological differences between managed and unmanaged landscapes. In Chapter 4, I used remotely sensed data and historical vegetation data in a GIS to examine changes occurred in vegetation cover since settlement in two major valleys, the Coquille and Tillamook, in the region. I used existing historical vegetation maps of the two valleys and collected historical vegetation data from the General Land Office (GLO) survey records. I characterized current vegetation conditions using an unsupervised classification of satellite images. Historically, the Coquille Valley was dominated by hardwood trees and the Tillamook was by conifers. Valley bottoms in both areas differed in vegetation from nearby uplands. Tree-covered areas have declined substantially in both valleys as a result of agriculture and development. The historical data offered reference conditions for assessment of changes in biodiversity that have occurred in these unique habitats. This thesis illustrates the benefit of using historical landscape information for better understanding of human influence on the landscape. Historical data often have many assumptions and limitations, but ecological impacts of landscape changes on native biota can be better understood by comparisons with historical conditions. Title: Disturbance and landscape history as a reference for evaluating forest management effects at a regional scale : examples from the Coast Range of Oregon, USA Author: Nonaka, Etsuko History is an invaluable source of information to understand and evaluate management influences on contemporary ecosystems and landscapes. The first two chapters (Chapters 2 and 3) explored the concept of historical range of variability (HRV) in landscape structure and stand structure using a stochastic fire simulation model to simulate presettlement (before 1850) landscapes of the Oregon Coast Range. HRV has been defined as the bounded variability of a system within constraints imposed by larger-scale phenomena (e.g. climate, topography) and without significant modern human influence. HRV of landscapes has been proposed as a guide for biodiversity conservation in the past decade. In Chapter 2, I estimated HRV of a regional landscape and evaluated the similarity of current and alternative future landscapes under two land management scenarios to the conditions within the HRV. The simulation results indicated that historical landscapes of the region were dynamic, composed of patches of various sizes and age classes ranging from 0 to> 800 years as well as numerous small unburned island patches. The current landscape was outside the HRV. The landscape did not return to the HRV in 100 years under either scenario largely because of lack of old-growth forests and overabundance of young forests. This study showed that the HRV can provide a reference condition for concrete, quantitative evaluations of landscape conditions and alternative management scenarios if sufficient data exist for estimating HRV. Departure from HRV can serve as an indicator of landscape conditions, but results depend on scale and quantification of landscape heterogeneity. In Chapter 3, I investigated the HRV in live and dead biomass and examined variability in disturbance history and forest stand development. I calculated biomass as a function of disturbance history. The HRV of live and dead wood biomass distributions revealed that the majority of the landscape historically contained > 500 Mg/ha of live wood and 50-200 Mg/ha of dead wood. The current dead wood condition is outside HRV. There was a wide variation in dead wood biomass because of variations in disturbance history. This study suggests that natural disturbance regimes and stand development are characterized by much larger variation than is typically portrayed or appreciated. The HRV approaches to evaluating landscape conditions need to include both landscape and stand characteristics to better represent ecological differences between managed and unmanaged landscapes. In Chapter 4, I used remotely sensed data and historical vegetation data in a GIS to examine changes occurred in vegetation cover since settlement in two major valleys, the Coquille and Tillamook, in the region. I used existing historical vegetation maps of the two valleys and collected historical vegetation data from the General Land Office (GLO) survey records. I characterized current vegetation conditions using an unsupervised classification of satellite images. Historically, the Coquille Valley was dominated by hardwood trees and the Tillamook was by conifers. Valley bottoms in both areas differed in vegetation from nearby uplands. Tree-covered areas have declined substantially in both valleys as a result of agriculture and development. The historical data offered reference conditions for assessment of changes in biodiversity that have occurred in these unique habitats. This thesis illustrates the benefit of using historical landscape information for better understanding of human influence on the landscape. Historical data often have many assumptions and limitations, but ecological impacts of landscape changes on native biota can be better understood by comparisons with historical conditions. Close

• 45. [Article] State Ownership, Yaquina Bay - Port of Newport North Shore moorage basin and waterfront of Newport (Submerged and Submersible Lands)

  Memorandum from the Division of State Lands giving the history of physical changes in Yaquina Bay relating to state ownership of tidal lands. "The following information on tideland sales, dredging filling, ...

  Citation × Citation Citation Abstract Copy Title: State Ownership, Yaquina Bay - Port of Newport North Shore moorage basin and waterfront of Newport (Submerged and Submersible Lands) Author: Oregon. Division of State Lands, Lumley, Perry E. Memorandum from the Division of State Lands giving the history of physical changes in Yaquina Bay relating to state ownership of tidal lands. "The following information on tideland sales, dredging filling, etc., is a comprehensive picture of these changes from 1895 to the present in order to determine the state ownership of these lands." (p.1) Referenced overlay material, maps and photographs are not included. Title: State Ownership, Yaquina Bay - Port of Newport North Shore moorage basin and waterfront of Newport (Submerged and Submersible Lands) Author: Oregon. Division of State Lands, Lumley, Perry E. Memorandum from the Division of State Lands giving the history of physical changes in Yaquina Bay relating to state ownership of tidal lands. "The following information on tideland sales, dredging filling, etc., is a comprehensive picture of these changes from 1895 to the present in order to determine the state ownership of these lands." (p.1) Referenced overlay material, maps and photographs are not included. Close

• 46. [Article] Essays on land use regulation

  This dissertation consists of three papers on land use economics and regulation. The first paper focuses on the environmental impacts of land use and their implications for the design on water quality ...

  Citation × Citation Citation Abstract Copy Title: Essays on land use regulation Author: Hascic, Ivan This dissertation consists of three papers on land use economics and regulation. The first paper focuses on the environmental impacts of land use and their implications for the design on water quality trading policies. The second and third papers address local land use regulations and their impact on land values and land use patterns. The first paper provides a national-scale, watershed-level assessment of land use impacts on water quality and aquatic ecosystems in the United States. The results suggest that the level of conventional water pollution in a watershed is significantly affected by the amount of land allocated to intensive agriculture and urban development, while the level of toxic water pollution is significantly affected by the amount of land allocated to transportation and mining. Implications of the results for the design and implementation of water quality trading policies are discussed. The second paper develops an empirical framework to conduct an exploratory analysis of effects of land use regulations on land values and land use patterns in a GIS-based landscape near Eugene, Oregon. All the land use regulations considered in this study, including exclusive farm use zoning, forest zoning, urban growth boundary designation, residential density zoning, commercial zoning, and industrial zoning, are found to affect land value and use both inside and outside of the designated zones. While there are many issues this framework does not address, preliminary results indicate that regulations (except commercial zoning) tend to increase the value of land outside the designated zones, but reduce the value of land inside the designated zones. The framework is applied to measure the reduction in value due to regulations vs. the value of individual exemptions at the parcel level to illuminate the controversy surrounding Oregon's Measure 37. The reductions in value due to regulations are found to be considerably smaller than the values of individual exemptions for almost all regulations contested in the Measure 37 claims. The third paper evaluates the efficiency of the current system of land use regulation, analyzes the possible changes to the regulatory structure, and studies the role of spatial and temporal interaction among neighboring land uses. Title: Essays on land use regulation Author: Hascic, Ivan This dissertation consists of three papers on land use economics and regulation. The first paper focuses on the environmental impacts of land use and their implications for the design on water quality trading policies. The second and third papers address local land use regulations and their impact on land values and land use patterns. The first paper provides a national-scale, watershed-level assessment of land use impacts on water quality and aquatic ecosystems in the United States. The results suggest that the level of conventional water pollution in a watershed is significantly affected by the amount of land allocated to intensive agriculture and urban development, while the level of toxic water pollution is significantly affected by the amount of land allocated to transportation and mining. Implications of the results for the design and implementation of water quality trading policies are discussed. The second paper develops an empirical framework to conduct an exploratory analysis of effects of land use regulations on land values and land use patterns in a GIS-based landscape near Eugene, Oregon. All the land use regulations considered in this study, including exclusive farm use zoning, forest zoning, urban growth boundary designation, residential density zoning, commercial zoning, and industrial zoning, are found to affect land value and use both inside and outside of the designated zones. While there are many issues this framework does not address, preliminary results indicate that regulations (except commercial zoning) tend to increase the value of land outside the designated zones, but reduce the value of land inside the designated zones. The framework is applied to measure the reduction in value due to regulations vs. the value of individual exemptions at the parcel level to illuminate the controversy surrounding Oregon's Measure 37. The reductions in value due to regulations are found to be considerably smaller than the values of individual exemptions for almost all regulations contested in the Measure 37 claims. The third paper evaluates the efficiency of the current system of land use regulation, analyzes the possible changes to the regulatory structure, and studies the role of spatial and temporal interaction among neighboring land uses. Close

• 47. [Article] Stream channel stability and sensitivity to landscape history and land use changes in Kelley Creek, Portland, Oregon

  This study examines stream channel erosion processes in a small urbanizing watershed influenced by deposits of the Columbia Basin catastrophic floods: Kelley Creek, a 12-km² tributary of Johnson Creek, ...

  Citation × Citation Citation Abstract Copy Title: Stream channel stability and sensitivity to landscape history and land use changes in Kelley Creek, Portland, Oregon Author: Murphy, Yarrow M. This study examines stream channel erosion processes in a small urbanizing watershed influenced by deposits of the Columbia Basin catastrophic floods: Kelley Creek, a 12-km² tributary of Johnson Creek, located just east of Portland, Oregon. Information on landscape history, stream channels, and sediment dynamics was compiled. The effects of future land use changes on stream channel response were projected. The likely effects of engineered solutions (stormwater management detention or infiltration facilities) are compared to land-use controls in mitigating the impact of future development on channel erosion. The geology of Kelley Creek is shaped by volcanic processes and Missoula floods, leading to fine-textured soils and streambeds that are susceptible to erosion. Headwaters are buttes of the Boring Lava formation overlain by Springwater Formation mudflow deposits. Alluvial silts deposited during late Pleistocene catastrophic floods mantle the low-relief valley floor. Land use in Kelley Creek transitioned from forestry to agriculture in the 20th century, and more recently to urban expansion, increasing concerns of watershed managers about effects of development on sediment dynamics. Since 1930, land use on the valley floor of Kelley Creek has been dominated by nursery and berry agricultural production. Forested headwaters have been impacted by roads, culverts, and timber harvest. Seven percent of watershed area is currently impervious, with housing and commercial uses projected to increase following the incorporation of Kelley Creek into Portland's metropolitan urban growth boundary. Field surveys and engineering calculations were used to estimate sediment transport under current and future conditions in the watershed. Cross sectional geometry, slope and sediment size distributions were obtained from 15 locations in first to second-order channels in the watershed, and data were analyzed with sediment transport equations to simulate annual sediment transport rates given current and post-development flow patterns. Results indicate that the stream channel is most sensitive to altered discharge patterns where gravel-sized (D₅₀ > 10 mm) sediments currently are mobilized during annual peak events. In locations where fine (D₅₀ < 5 mm) particles dominate the stream bed, particles mobilize throughout the year and changes in discharge patterns do not increase the duration of transport or overall bedload yields. Because most of the sensitive locations with gravel sediments are located within or near the forested headwaters, preserving these headwater forests will protect sensitive stream channels as effectively as engineered stormwater retention or infiltration approaches. Kelley Creek's stream channel is still adjusting to recent mudflows and catastrophic floods, which provided abundant supplies of fine, erodible materials. Allowing this adjustment to continue without accelerating erosion in the face of rapid urban development poses an unusual challenge for managing geomorphic processes. Title: Stream channel stability and sensitivity to landscape history and land use changes in Kelley Creek, Portland, Oregon Author: Murphy, Yarrow M. This study examines stream channel erosion processes in a small urbanizing watershed influenced by deposits of the Columbia Basin catastrophic floods: Kelley Creek, a 12-km² tributary of Johnson Creek, located just east of Portland, Oregon. Information on landscape history, stream channels, and sediment dynamics was compiled. The effects of future land use changes on stream channel response were projected. The likely effects of engineered solutions (stormwater management detention or infiltration facilities) are compared to land-use controls in mitigating the impact of future development on channel erosion. The geology of Kelley Creek is shaped by volcanic processes and Missoula floods, leading to fine-textured soils and streambeds that are susceptible to erosion. Headwaters are buttes of the Boring Lava formation overlain by Springwater Formation mudflow deposits. Alluvial silts deposited during late Pleistocene catastrophic floods mantle the low-relief valley floor. Land use in Kelley Creek transitioned from forestry to agriculture in the 20th century, and more recently to urban expansion, increasing concerns of watershed managers about effects of development on sediment dynamics. Since 1930, land use on the valley floor of Kelley Creek has been dominated by nursery and berry agricultural production. Forested headwaters have been impacted by roads, culverts, and timber harvest. Seven percent of watershed area is currently impervious, with housing and commercial uses projected to increase following the incorporation of Kelley Creek into Portland's metropolitan urban growth boundary. Field surveys and engineering calculations were used to estimate sediment transport under current and future conditions in the watershed. Cross sectional geometry, slope and sediment size distributions were obtained from 15 locations in first to second-order channels in the watershed, and data were analyzed with sediment transport equations to simulate annual sediment transport rates given current and post-development flow patterns. Results indicate that the stream channel is most sensitive to altered discharge patterns where gravel-sized (D₅₀ > 10 mm) sediments currently are mobilized during annual peak events. In locations where fine (D₅₀ < 5 mm) particles dominate the stream bed, particles mobilize throughout the year and changes in discharge patterns do not increase the duration of transport or overall bedload yields. Because most of the sensitive locations with gravel sediments are located within or near the forested headwaters, preserving these headwater forests will protect sensitive stream channels as effectively as engineered stormwater retention or infiltration approaches. Kelley Creek's stream channel is still adjusting to recent mudflows and catastrophic floods, which provided abundant supplies of fine, erodible materials. Allowing this adjustment to continue without accelerating erosion in the face of rapid urban development poses an unusual challenge for managing geomorphic processes. Close

• 48. [Article] How have land-use regulations affected property values in Oregon?

  Published June 2007. Reviewed January 2015. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.o...

  Citation × Citation Citation Abstract Copy Title: How have land-use regulations affected property values in Oregon? Author: Plantinga, Andrew J., Jaeger, William K. (William Kenneth), Oregon State University. Extension Service Published June 2007. Reviewed January 2015. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: How have land-use regulations affected property values in Oregon? Author: Plantinga, Andrew J., Jaeger, William K. (William Kenneth), Oregon State University. Extension Service Published June 2007. Reviewed January 2015. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 49. [Article] Documentation of land use plan conformance and NEPA adequacy (DNA)

  Citation × Citation Citation Abstract Copy Title: Documentation of land use plan conformance and NEPA adequacy (DNA) Author: Klamath Falls Resource Area, United States. Bureau of Land Management Title: Documentation of land use plan conformance and NEPA adequacy (DNA) Author: Klamath Falls Resource Area, United States. Bureau of Land Management Close

• 50. [Article] Life history and evolutionary adaptation of Pacific salmon and its application in management

  An approach to understanding and managing anadromous salmon, steelhead, and sea-run cutthroat trout (Oncorhynchus spp.) based on life history and evolutionary adaptive capacities of species and stocks ...

  Citation × Citation Citation Abstract Copy Title: Life history and evolutionary adaptation of Pacific salmon and its application in management Author: Wevers, Mary Jo An approach to understanding and managing anadromous salmon, steelhead, and sea-run cutthroat trout (Oncorhynchus spp.) based on life history and evolutionary adaptive capacities of species and stocks is presented. Species, stocks, and local populations are viewed as systems that are continuously adapting to changing environmental conditions. They have the potential capacity to evolve in different ways in different environments through both life history and evolutionary adaptation. Habitat organization forms a template for genus, species, stock, and local population life history organization. Harvesting, habitat alteration resulting from land use practices and other human activities can alter the organization and adaptive capacities of species and stocks, and thus their long term persistence. The adaptive capacity of Oncorhynchus relative to its habitat and management environment is examined at the species, stock, and local population levels. Life history characteristics of representative stocks and local populations are analyzed using Detrended Correspondence Analysis (DECORANA). Fresh water migration distance and latitude are used to "explain" ordination patterns of Oncorhynchus species in the North Pacific Basin. Fresh water migration difficulty and mean annual runoff are used to interpret life history patterns of Columbia Basin chinook salmon stocks. Upstream migration difficulty and fall water temperatures are used to explain the ordination patterns of local populations of Willamette spring chinook salmon. Fishery management practices are examined in terms of their impacts on the organization and adaptive capacity of species, stocks, and local populations of Oncorhynchus. Management generalizations and guidelines derived from the life history theory are applied to management of Willamette spring chinook salmon. Maintaining habitat changes in the Willamette Basin within the historic range of fluctuations will tend to maximize co-organization of local populations. Management activities should provide relatively constant habitat and fishery conditions for natural selection processes to "organize" life history traits over a period of at least a few generations. Fisheries should selectively harvest local populations that show a high degree of realization of their adaptive capacity. By focusing instead on maximizing the co-organization of stocks, their habitat and fishery environments, and protecting the adaptive capacities of stocks, we will go a long way toward providing long-term sustainability for social communities dependent on fisheries. Title: Life history and evolutionary adaptation of Pacific salmon and its application in management Author: Wevers, Mary Jo An approach to understanding and managing anadromous salmon, steelhead, and sea-run cutthroat trout (Oncorhynchus spp.) based on life history and evolutionary adaptive capacities of species and stocks is presented. Species, stocks, and local populations are viewed as systems that are continuously adapting to changing environmental conditions. They have the potential capacity to evolve in different ways in different environments through both life history and evolutionary adaptation. Habitat organization forms a template for genus, species, stock, and local population life history organization. Harvesting, habitat alteration resulting from land use practices and other human activities can alter the organization and adaptive capacities of species and stocks, and thus their long term persistence. The adaptive capacity of Oncorhynchus relative to its habitat and management environment is examined at the species, stock, and local population levels. Life history characteristics of representative stocks and local populations are analyzed using Detrended Correspondence Analysis (DECORANA). Fresh water migration distance and latitude are used to "explain" ordination patterns of Oncorhynchus species in the North Pacific Basin. Fresh water migration difficulty and mean annual runoff are used to interpret life history patterns of Columbia Basin chinook salmon stocks. Upstream migration difficulty and fall water temperatures are used to explain the ordination patterns of local populations of Willamette spring chinook salmon. Fishery management practices are examined in terms of their impacts on the organization and adaptive capacity of species, stocks, and local populations of Oncorhynchus. Management generalizations and guidelines derived from the life history theory are applied to management of Willamette spring chinook salmon. Maintaining habitat changes in the Willamette Basin within the historic range of fluctuations will tend to maximize co-organization of local populations. Management activities should provide relatively constant habitat and fishery conditions for natural selection processes to "organize" life history traits over a period of at least a few generations. Fisheries should selectively harvest local populations that show a high degree of realization of their adaptive capacity. By focusing instead on maximizing the co-organization of stocks, their habitat and fishery environments, and protecting the adaptive capacities of stocks, we will go a long way toward providing long-term sustainability for social communities dependent on fisheries. Close