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• 41. [Article] South Fork Alsea watershed analysis

  Citation × Citation Citation Abstract Copy Title: South Fork Alsea watershed analysis Title: South Fork Alsea watershed analysis Close

• 42. [Article] Summary of information on aquatic biota and their habitats in the Willamette Basin, Oregon, through 1995

  This report reviews and summarizes available information on aquatic biological communities in the Willamette Basin through 1995. Specifically, the report describes (1) the distribution, abndance, and trends ...

  Citation × Citation Citation Abstract Copy Title: Summary of information on aquatic biota and their habitats in the Willamette Basin, Oregon, through 1995 Author: National Water-Quality Assessment Program (U.S.), Altman, Bob, Henson, Colleen M., Waite, Ian R., U.S. Fish and Wildlife Service, Geological Survey (U.S.) This report reviews and summarizes available information on aquatic biological communities in the Willamette Basin through 1995. Specifically, the report describes (1) the distribution, abndance, and trends of three taxonomic groups--algae, macroinvertebrates, and fish--and, to a lesser degree, other selected semi-aquatic taxa (i.e., taxa frequenting but not living wholly in water), including amphibians and reptiles, birds, and mammals, (2) the types of aquatic and riparian habitat that support and influence aquatic communities and their biotic constituents, (3) the natural and human-associated impacts on that habitat and associated biological communities, amd (4) the levels of enviroinmental contaminants to which biological communities and specific biota are exposed. The information in this report is intended to aid in the identification of data gaps relative to taxa and geographic areas, and to stimulate collaboration and increase coordination in present and future ecological research in the Willamette Basin. Title: Summary of information on aquatic biota and their habitats in the Willamette Basin, Oregon, through 1995 Author: National Water-Quality Assessment Program (U.S.), Altman, Bob, Henson, Colleen M., Waite, Ian R., U.S. Fish and Wildlife Service, Geological Survey (U.S.) This report reviews and summarizes available information on aquatic biological communities in the Willamette Basin through 1995. Specifically, the report describes (1) the distribution, abndance, and trends of three taxonomic groups--algae, macroinvertebrates, and fish--and, to a lesser degree, other selected semi-aquatic taxa (i.e., taxa frequenting but not living wholly in water), including amphibians and reptiles, birds, and mammals, (2) the types of aquatic and riparian habitat that support and influence aquatic communities and their biotic constituents, (3) the natural and human-associated impacts on that habitat and associated biological communities, amd (4) the levels of enviroinmental contaminants to which biological communities and specific biota are exposed. The information in this report is intended to aid in the identification of data gaps relative to taxa and geographic areas, and to stimulate collaboration and increase coordination in present and future ecological research in the Willamette Basin. Close

• 43. [Article] Sauvie Island north unit wetlands project : biological opinion

  The objective of this Biological Opinion (BO) is to determine whether the action to restore emergent vegetation to wetlands on Sauvie Island is likely to jeopardize the continued existence of Upper Willamette ...

  Citation × Citation Citation Abstract Copy Title: Sauvie Island north unit wetlands project : biological opinion The objective of this Biological Opinion (BO) is to determine whether the action to restore emergent vegetation to wetlands on Sauvie Island is likely to jeopardize the continued existence of Upper Willamette River chinook salmon and Lower Columbia river chinook salmon or destroy, or adversely modify proposed critical habitat. Title: Sauvie Island north unit wetlands project : biological opinion The objective of this Biological Opinion (BO) is to determine whether the action to restore emergent vegetation to wetlands on Sauvie Island is likely to jeopardize the continued existence of Upper Willamette River chinook salmon and Lower Columbia river chinook salmon or destroy, or adversely modify proposed critical habitat. Close

• 44. [Article] Classification of oak vegetation in the Willamette Valley

  A plant community classification was developed describing the comprehensive variation of oak vegetation currently occupying the Willamette Valley Ecoregion of western Oregon. Multivariate statistical analyses ...

  Citation × Citation Citation Abstract Copy Title: Classification of oak vegetation in the Willamette Valley Author: Fitzpatrick, Greg, Kertis, Jane, Alverson, Ed, Buechling, Arne A plant community classification was developed describing the comprehensive variation of oak vegetation currently occupying the Willamette Valley Ecoregion of western Oregon. Multivariate statistical analyses were used to classify field collected floristic and habitat data. Field sampling targeted minimally managed, homogenous vegetation stands with a significant oak component occupying at least 0.5 ha. Potential habitat locations were identified from local expert knowledge, data from The Nature Conservancy’s previous conservation planning efforts, and an interpretation of high resolution NAIP imagery. Potential oak habitats were digitized in a GIS and a random selection of sites stratifying significant environmental gradients was generated in order capture the range of oak habitat variability. Precise sample plot locations were predetermined and established at digitized stand centroids. Field sampling was based on relevé plot data collection methods and included ocular estimates of species cover. A total of 350 stands of oak vegetation were sampled over two field seasons. Two-way indicator species analysis (TWINSPAN) was used as an exploratory tool to identify potential patterns in species cover data and Detrended Correspondence Analysis (DCA) was used to delimit final plant community types. Nine vegetation classes were described from ordinations including seven forest / woodland types and two savannas Title: Classification of oak vegetation in the Willamette Valley Author: Fitzpatrick, Greg, Kertis, Jane, Alverson, Ed, Buechling, Arne A plant community classification was developed describing the comprehensive variation of oak vegetation currently occupying the Willamette Valley Ecoregion of western Oregon. Multivariate statistical analyses were used to classify field collected floristic and habitat data. Field sampling targeted minimally managed, homogenous vegetation stands with a significant oak component occupying at least 0.5 ha. Potential habitat locations were identified from local expert knowledge, data from The Nature Conservancy’s previous conservation planning efforts, and an interpretation of high resolution NAIP imagery. Potential oak habitats were digitized in a GIS and a random selection of sites stratifying significant environmental gradients was generated in order capture the range of oak habitat variability. Precise sample plot locations were predetermined and established at digitized stand centroids. Field sampling was based on relevé plot data collection methods and included ocular estimates of species cover. A total of 350 stands of oak vegetation were sampled over two field seasons. Two-way indicator species analysis (TWINSPAN) was used as an exploratory tool to identify potential patterns in species cover data and Detrended Correspondence Analysis (DCA) was used to delimit final plant community types. Nine vegetation classes were described from ordinations including seven forest / woodland types and two savannas Close

• 45. [Article] Water quality effects of hyporheic processing

  "PB2000-107420."

  Citation × Citation Citation Abstract Copy Title: Water quality effects of hyporheic processing Author: Wigington, P.J., Landers, Dixon, Fernald, Alexander "PB2000-107420." Title: Water quality effects of hyporheic processing Author: Wigington, P.J., Landers, Dixon, Fernald, Alexander "PB2000-107420." Close

• 46. [Article] Trask River watershed analysis : final report, August 2003

  Recommendations are provided in this watershed analysis to identify actions and management decisions on the part of BLM that might improve watershed health in the Trask River watershed.

  Citation × Citation Citation Abstract Copy Title: Trask River watershed analysis : final report, August 2003 Author: E&S Environmental Chemistry, Inc., Sullivan, Timothy J., Snyder, Kai U., Oregon. Dept. of Forestry, Raymond, Richard B., Gilbert, Erin H., United States. Bureau of Land Management, Moore, Deian L. Recommendations are provided in this watershed analysis to identify actions and management decisions on the part of BLM that might improve watershed health in the Trask River watershed. Title: Trask River watershed analysis : final report, August 2003 Author: E&S Environmental Chemistry, Inc., Sullivan, Timothy J., Snyder, Kai U., Oregon. Dept. of Forestry, Raymond, Richard B., Gilbert, Erin H., United States. Bureau of Land Management, Moore, Deian L. Recommendations are provided in this watershed analysis to identify actions and management decisions on the part of BLM that might improve watershed health in the Trask River watershed. Close

• 47. [Article] Ecological functions of off-channel habitat, Willamette River, Oregon : final research plan

  Off-channel features such as alcoves and side channels can have important ecological functions for large rivers such as the Willamette River. Some species and age classes of fish may select these features ...

  Citation × Citation Citation Abstract Copy Title: Ecological functions of off-channel habitat, Willamette River, Oregon : final research plan Author: Sharps, D., Cline, S.P., Landers, Dixon, Andrus, Charles W., Erway, M.L. Off-channel features such as alcoves and side channels can have important ecological functions for large rivers such as the Willamette River. Some species and age classes of fish may select these features instead of the main channel to feed, avoid predation by other fish, escape fast water, or seek out cool water in the summer. Other organisms such as amphibians, mussels, and birds may also be attracted to alcoves and side channels because of unique physical and water quality characteristics. This proposal describes research to evaluate the functions of alcoves and side channels in a large river ecosystem, determine factors that currently affect their ecological functions, and identify future management actions that could be taken to improve these functions. In addition, the authors intend to relate the processes occurring within alcoves and side channels to processes occurring in the main channel, in adjacent ground water, and the riparian vegetative community. Title: Ecological functions of off-channel habitat, Willamette River, Oregon : final research plan Author: Sharps, D., Cline, S.P., Landers, Dixon, Andrus, Charles W., Erway, M.L. Off-channel features such as alcoves and side channels can have important ecological functions for large rivers such as the Willamette River. Some species and age classes of fish may select these features instead of the main channel to feed, avoid predation by other fish, escape fast water, or seek out cool water in the summer. Other organisms such as amphibians, mussels, and birds may also be attracted to alcoves and side channels because of unique physical and water quality characteristics. This proposal describes research to evaluate the functions of alcoves and side channels in a large river ecosystem, determine factors that currently affect their ecological functions, and identify future management actions that could be taken to improve these functions. In addition, the authors intend to relate the processes occurring within alcoves and side channels to processes occurring in the main channel, in adjacent ground water, and the riparian vegetative community. Close

• 48. [Article] Umatilla River Basin Anadromous Fish Habitat Enhancement Project -- 1992 annual report

  Citation × Citation Citation Abstract Copy Title: Umatilla River Basin Anadromous Fish Habitat Enhancement Project -- 1992 annual report Author: Scheeler, Carl A., Shaw, R. Todd Title: Umatilla River Basin Anadromous Fish Habitat Enhancement Project -- 1992 annual report Author: Scheeler, Carl A., Shaw, R. Todd Close

• 49. [Article] Coastal steelhead trout : life in the watershed

  Citation × Citation Citation Abstract Copy Title: Coastal steelhead trout : life in the watershed Author: Fitzpatrick, Martin S., Oregon State University. Sea Grant College Program Title: Coastal steelhead trout : life in the watershed Author: Fitzpatrick, Martin S., Oregon State University. Sea Grant College Program Close

• 50. [Article] Lake classification in the glacially influenced landscape of the north Cascade mountains, Washington, USA

  Factors affecting physical, chemical, and biological characteristics of lakes were investigated through the development of a lake-classification system for 162 lakes in North Cascades National Park Service ...

  Citation × Citation Citation Abstract Copy Title: Lake classification in the glacially influenced landscape of the north Cascade mountains, Washington, USA Author: Lomnicky, Gregg A. Factors affecting physical, chemical, and biological characteristics of lakes were investigated through the development of a lake-classification system for 162 lakes in North Cascades National Park Service Complex. A conceptual view of lake development and its relationship to the expression of lake and watershed characteristics was derived. Water quality and biological assemblages of these primarily glacially formed high-mountain oligotrophic lakes were influenced by elevation, lake morphology, and certain watershed characteristics: aspect, vegetation, soils, hydrology, and degree of glacial influence. Lakes continually evolve relative to changes in their watershed environments. A watershed-based, three-level hierarchical classification was created to include 1) lake position relative to the hydrologic crest of the North Cascade Mountain Range, 2) vegetation zone (alpine, subalpine, low elevation forest, high elevation forest), and 3) basin origin. Hydrologic crest position differentiated broad-scale climatic differences in precipitation and air temperature. Vegetation zones reflected the localized geology (soil maturation) and climate (precipitation, aspect). Morphogenetic class identified differences in lake morphology, landscape position, and potential for persistence, and were unequally distributed across vegetation zones with forest zones most diverse. Time of ice-out increased from low-forest lakes to alpine lakes; eastslope lakes iced-out earlier. Epilimnetic temperature was warmest in low-forest lakes and coolest in alpine lakes. Classification did not clearly order lakes relative to chemical characteristics, though westslope low-forest lakes differed significantly from other lake classes and were most productive. Little seasonal or annual variation for most chemical characteristics were found. However, chemical differences did mirror environmental and physical differences between lakes. High phosphorus levels separated glacially influenced lakes. Total Kjeldahl-N and total phosphorus concentrations decreased with increasing lake depth. For a given flushing ratio, Kjeldahl-N decreased from low-forest to alpine zones. Depth and vegetation class ordered the diversity and composition of phytoplankton, zooplankton, and benthic macroinvertebrate assemblages. Nutrients, conductivity, pH, alkalinity, and cations were correlated with phytoplankton and zooplankton assemblages. Non-native trout presence was associated with large, deep [greater than or equal to] 3 m) lakes. Title: Lake classification in the glacially influenced landscape of the north Cascade mountains, Washington, USA Author: Lomnicky, Gregg A. Factors affecting physical, chemical, and biological characteristics of lakes were investigated through the development of a lake-classification system for 162 lakes in North Cascades National Park Service Complex. A conceptual view of lake development and its relationship to the expression of lake and watershed characteristics was derived. Water quality and biological assemblages of these primarily glacially formed high-mountain oligotrophic lakes were influenced by elevation, lake morphology, and certain watershed characteristics: aspect, vegetation, soils, hydrology, and degree of glacial influence. Lakes continually evolve relative to changes in their watershed environments. A watershed-based, three-level hierarchical classification was created to include 1) lake position relative to the hydrologic crest of the North Cascade Mountain Range, 2) vegetation zone (alpine, subalpine, low elevation forest, high elevation forest), and 3) basin origin. Hydrologic crest position differentiated broad-scale climatic differences in precipitation and air temperature. Vegetation zones reflected the localized geology (soil maturation) and climate (precipitation, aspect). Morphogenetic class identified differences in lake morphology, landscape position, and potential for persistence, and were unequally distributed across vegetation zones with forest zones most diverse. Time of ice-out increased from low-forest lakes to alpine lakes; eastslope lakes iced-out earlier. Epilimnetic temperature was warmest in low-forest lakes and coolest in alpine lakes. Classification did not clearly order lakes relative to chemical characteristics, though westslope low-forest lakes differed significantly from other lake classes and were most productive. Little seasonal or annual variation for most chemical characteristics were found. However, chemical differences did mirror environmental and physical differences between lakes. High phosphorus levels separated glacially influenced lakes. Total Kjeldahl-N and total phosphorus concentrations decreased with increasing lake depth. For a given flushing ratio, Kjeldahl-N decreased from low-forest to alpine zones. Depth and vegetation class ordered the diversity and composition of phytoplankton, zooplankton, and benthic macroinvertebrate assemblages. Nutrients, conductivity, pH, alkalinity, and cations were correlated with phytoplankton and zooplankton assemblages. Non-native trout presence was associated with large, deep [greater than or equal to] 3 m) lakes. Close