Search

Search Results

• 71. [Article] Vegetation changes in the Willamette River Greenway, Benton and Linn Counties, Oregon, 1972-1981

  The nature and extent of niparian vegetation change from 1972 to 1981 in the Willamette River Greenway in Benton and Linn Counties, Oregon was quantitatively investigated. The study was primarily by aerial ...

  Citation × Citation Citation Abstract Copy Title: Vegetation changes in the Willamette River Greenway, Benton and Linn Counties, Oregon, 1972-1981 Author: Wickramaratne, Siri Nimal The nature and extent of niparian vegetation change from 1972 to 1981 in the Willamette River Greenway in Benton and Linn Counties, Oregon was quantitatively investigated. The study was primarily by aerial imagery analysis and associated field verification. A classification of vegetation and land cover within the study area was developed and employed in imagery interpretation. Vegetation cover within the Greenway based on this classification was mapped at a scale of 1:12,000 using 1981 color infrared and 1976 natural color imagery. Two additional sets of working maps, each consisting of 29 sheets, were prepared from 1972 and 1981 airphoto coverage respectively. Each set portrayed total vegetation cover, agricultural cover, and urban/industrial cover. Comparison of the two sets of maps facilitated completion of a single set of vegetation and land cover change maps depicting loss of vegetation at the expense of gains in agricultural and urban/industrial cover within the Greenway. Area in vegetation, agriculture, and urban/industrial development was measured for 1972 and 1981 for Benton and Linn Counties and change in each category determined. In Benton County a total loss of 436 acres of vegetation within the Greenway was found. This is about 8% of the total Benton County Greenway area of 5,505 acres. In Linri County the total loss was 290 acres which amounts to about 4% of the total Linn County Greenway area of 7,308 acres. Of the total Greenway vegetation lost in both counties, 60% was in Benton County and 40% was in Linn County. No gain in vegetation in the Willainette River Greenway was observed. A net loss of vegetation to agriculture and development was found in each county. Title: Vegetation changes in the Willamette River Greenway, Benton and Linn Counties, Oregon, 1972-1981 Author: Wickramaratne, Siri Nimal The nature and extent of niparian vegetation change from 1972 to 1981 in the Willamette River Greenway in Benton and Linn Counties, Oregon was quantitatively investigated. The study was primarily by aerial imagery analysis and associated field verification. A classification of vegetation and land cover within the study area was developed and employed in imagery interpretation. Vegetation cover within the Greenway based on this classification was mapped at a scale of 1:12,000 using 1981 color infrared and 1976 natural color imagery. Two additional sets of working maps, each consisting of 29 sheets, were prepared from 1972 and 1981 airphoto coverage respectively. Each set portrayed total vegetation cover, agricultural cover, and urban/industrial cover. Comparison of the two sets of maps facilitated completion of a single set of vegetation and land cover change maps depicting loss of vegetation at the expense of gains in agricultural and urban/industrial cover within the Greenway. Area in vegetation, agriculture, and urban/industrial development was measured for 1972 and 1981 for Benton and Linn Counties and change in each category determined. In Benton County a total loss of 436 acres of vegetation within the Greenway was found. This is about 8% of the total Benton County Greenway area of 5,505 acres. In Linri County the total loss was 290 acres which amounts to about 4% of the total Linn County Greenway area of 7,308 acres. Of the total Greenway vegetation lost in both counties, 60% was in Benton County and 40% was in Linn County. No gain in vegetation in the Willainette River Greenway was observed. A net loss of vegetation to agriculture and development was found in each county. Close

• 72. [Article] Numerical classification of range vegetation and statistical analysis of its ecology

  The purpose of the research was to computerize mathematical procedures for the analysis of range vegetation and environmental data. The specific objectives were as follows: 1. to develop and apply computer ...

  Citation × Citation Citation Abstract Copy Title: Numerical classification of range vegetation and statistical analysis of its ecology Author: Pyott, William Tucker, 1936- The purpose of the research was to computerize mathematical procedures for the analysis of range vegetation and environmental data. The specific objectives were as follows: 1. to develop and apply computer techniques to the classification of vegetation in order to provide a phytosociological framework within which to investigate the ecology of range vegetation, and 2. to adapt computer software for multivariate statistical techniques to the analysis of vegetation-environment relationships. In fulfilling these objectives a synthesis of classical phytosociological principles and methods with techniques of numerical taxonomy was achieved. A Euclidean mathematical model for numerical taxonomy was selected. Hierarchical, polythetic-agglomerative classification procedures, measures of interspecies and interstand relationships, and forms of data (species presence vs. species amount) were compared. Computer programs were written in FORTRAN for classification. Data used were from sagebrush-grass ranges of eastern Oregon as well as from the literature. Classification results were evaluated according to the principles of the Braun-Blanquet system, by the chaining coefficient, and by stepwise discriminant analysis. The latter analysis was also used to determine the degree of correlation of environmental variables with vegetation pattern (from classification). Ward's method, which minimizes the within groups sum of squares (error S. S.), was selected as the classification strategy for both species and stands. Squared Euclidean distance for presence only data was selected as the coefficient of interspecies relationships. It produced the best definition of species groups and had the lowest chaining coefficient. Squared Euclidean distance calculated from standardized vegetation data (such as % foliage cover transformed to zero mean and unit variance by species) gave as good or better results for stand classification as the squared distance calculated from presence only data (depending on the data set). Species were classified first to determine groups of potential differential species (internally cohesive, mutually exclusive species groups). Only these species were retained as the basis of stand classification. In the stepwise discriminant analysis of stand groups, differential species were invariably the first few entered as discriminating variables. Patterns of similarities and differences appeared in the environmental data which were highly similar to patterns in the results of the vegetation classification. In stepwise discriminant analysis of environmental data, site variables and soil physical and chemical variables were equally prominent as the first discriminants entered. The hierarchical nature of the classification procedure makes possible the determination of species groups which identify vegetation units (and thus environments) at different levels of synthesis. Thus the same data base can be used for broad land use planning purposes as well as for intensive management of individual range units. The necessarily large sample sizes make computer aid essential for efficient data analysis. These computer classification procedures take only a few hours (11 hours maximum total elapsed time at a remote console) in contrast with weeks (at best) for error-prone classical phytosociological data manipulation. The substantial time-saving frees the researcher to concentrate on classification results interpretation and application to land use and management problems rather than data manipulation. Title: Numerical classification of range vegetation and statistical analysis of its ecology Author: Pyott, William Tucker, 1936- The purpose of the research was to computerize mathematical procedures for the analysis of range vegetation and environmental data. The specific objectives were as follows: 1. to develop and apply computer techniques to the classification of vegetation in order to provide a phytosociological framework within which to investigate the ecology of range vegetation, and 2. to adapt computer software for multivariate statistical techniques to the analysis of vegetation-environment relationships. In fulfilling these objectives a synthesis of classical phytosociological principles and methods with techniques of numerical taxonomy was achieved. A Euclidean mathematical model for numerical taxonomy was selected. Hierarchical, polythetic-agglomerative classification procedures, measures of interspecies and interstand relationships, and forms of data (species presence vs. species amount) were compared. Computer programs were written in FORTRAN for classification. Data used were from sagebrush-grass ranges of eastern Oregon as well as from the literature. Classification results were evaluated according to the principles of the Braun-Blanquet system, by the chaining coefficient, and by stepwise discriminant analysis. The latter analysis was also used to determine the degree of correlation of environmental variables with vegetation pattern (from classification). Ward's method, which minimizes the within groups sum of squares (error S. S.), was selected as the classification strategy for both species and stands. Squared Euclidean distance for presence only data was selected as the coefficient of interspecies relationships. It produced the best definition of species groups and had the lowest chaining coefficient. Squared Euclidean distance calculated from standardized vegetation data (such as % foliage cover transformed to zero mean and unit variance by species) gave as good or better results for stand classification as the squared distance calculated from presence only data (depending on the data set). Species were classified first to determine groups of potential differential species (internally cohesive, mutually exclusive species groups). Only these species were retained as the basis of stand classification. In the stepwise discriminant analysis of stand groups, differential species were invariably the first few entered as discriminating variables. Patterns of similarities and differences appeared in the environmental data which were highly similar to patterns in the results of the vegetation classification. In stepwise discriminant analysis of environmental data, site variables and soil physical and chemical variables were equally prominent as the first discriminants entered. The hierarchical nature of the classification procedure makes possible the determination of species groups which identify vegetation units (and thus environments) at different levels of synthesis. Thus the same data base can be used for broad land use planning purposes as well as for intensive management of individual range units. The necessarily large sample sizes make computer aid essential for efficient data analysis. These computer classification procedures take only a few hours (11 hours maximum total elapsed time at a remote console) in contrast with weeks (at best) for error-prone classical phytosociological data manipulation. The substantial time-saving frees the researcher to concentrate on classification results interpretation and application to land use and management problems rather than data manipulation. Close

• 73. [Article] Tillamook Bay, Oregon, geographic response plan (GRP)

  Citation × Citation Citation Abstract Copy Title: Tillamook Bay, Oregon, geographic response plan (GRP) Title: Tillamook Bay, Oregon, geographic response plan (GRP) Close

• 74. [Image] An investigation into the comparative utility of color infrared aerial photography and LANDSAT data for detailed surface cover type mapping within Crater Lake National Park, Oregon

  	ill., maps; Typescript (photocopy); Thesis (Ph. D.)--Oregon State University, 1978; Includes bibliographical references
  	Citation × Citation Citation Abstract Copy Title: An investigation into the comparative utility of color infrared aerial photography and LANDSAT data for detailed surface cover type mapping within Crater Lake National Park, Oregon Author: Walsh, Stephen Joseph, Year: 1977, 2009 ill., maps; Typescript (photocopy); Thesis (Ph. D.)--Oregon State University, 1978; Includes bibliographical references Title: An investigation into the comparative utility of color infrared aerial photography and LANDSAT data for detailed surface cover type mapping within Crater Lake National Park, Oregon Author: Walsh, Stephen Joseph, Year: 1977, 2009 ill., maps; Typescript (photocopy); Thesis (Ph. D.)--Oregon State University, 1978; Includes bibliographical references Close

• 75. [Article] Texture analysis riparian coniferous forest ADAR imagery to identify potential ecological indicators for monitoring

  The Airborne Data Acquisition and Registration (ADAR) remote sensing system captured one-meter resolution imagery of 25 different riparian sites in drift Creek Basin of coastal northwestern Oregon, USA. ...

  Citation × Citation Citation Abstract Copy Title: Texture analysis riparian coniferous forest ADAR imagery to identify potential ecological indicators for monitoring Author: Fiorella, M., Barker, Jerry R., Ringold, P.L., Bradshaw, Gay, Bollman, Mike The Airborne Data Acquisition and Registration (ADAR) remote sensing system captured one-meter resolution imagery of 25 different riparian sites in drift Creek Basin of coastal northwestern Oregon, USA. The multispectral, digital data characterized riparian areas with the intent to develop ecological indicators for long-term monitoring. Title: Texture analysis riparian coniferous forest ADAR imagery to identify potential ecological indicators for monitoring Author: Fiorella, M., Barker, Jerry R., Ringold, P.L., Bradshaw, Gay, Bollman, Mike The Airborne Data Acquisition and Registration (ADAR) remote sensing system captured one-meter resolution imagery of 25 different riparian sites in drift Creek Basin of coastal northwestern Oregon, USA. The multispectral, digital data characterized riparian areas with the intent to develop ecological indicators for long-term monitoring. Close

• 76. [Article] Wet Meadow Plant Associations, Double O Unit, Malheur National Wildlife Refuge, Harney County, Oregon

  This report summarizes vegetation data collected in July 2015 in wet meadow and marshy habitats on the Double O Unit of Malheur National Wildlife Refuge (MNWR). Because vegetation sampled at the Double ...

  Citation × Citation Citation Abstract Copy Title: Wet Meadow Plant Associations, Double O Unit, Malheur National Wildlife Refuge, Harney County, Oregon Author: Christy, John A. Year: 2016 This report summarizes vegetation data collected in July 2015 in wet meadow and marshy habitats on the Double O Unit of Malheur National Wildlife Refuge (MNWR). Because vegetation sampled at the Double O was wetter and more alkaline than wet meadows sampled at the south end of the refuge in 2012 and 2013 (Christy 2014), data from the Double O Unit were analyzed and summarized separately. A total of 83 plots were sampled in 2015, and analysis of the data identified 14 plant associations: Alopecurus aequalis - Juncus balticus, Alopecurus pratensis - Potentilla anserina, Carex praegracilis - Juncus balticus, Cicuta douglasii - Carex nebrascensis, Distichlis spicata - Amphiscirpus nevadensis, Distichlis spicata - Nitrophila occidentalis, Eleocharis palustris - Juncus balticus, Eleocharis rostellata, Juncus balticus - Glaux maritima, Hippuris vulgaris - Triglochin maritima, Leymus triticoides - Juncus balticus, Schoenoplectus americanus, Spartina gracilis, and Triglochin maritima. Plant associations spanned a wetland gradient from seasonally moist to seasonally or perennially flooded, but surface water had left most stands at time of sampling. Mean Wetland Indicator Status scores and species composition help to place the plant associations within gradients in soil moisture and alkalinity. Seven of the 14 plant associations are listed in the International Vegetation Classification, and the remaining types are provisional Title: Wet Meadow Plant Associations, Double O Unit, Malheur National Wildlife Refuge, Harney County, Oregon Author: Christy, John A. Year: 2016 This report summarizes vegetation data collected in July 2015 in wet meadow and marshy habitats on the Double O Unit of Malheur National Wildlife Refuge (MNWR). Because vegetation sampled at the Double O was wetter and more alkaline than wet meadows sampled at the south end of the refuge in 2012 and 2013 (Christy 2014), data from the Double O Unit were analyzed and summarized separately. A total of 83 plots were sampled in 2015, and analysis of the data identified 14 plant associations: Alopecurus aequalis - Juncus balticus, Alopecurus pratensis - Potentilla anserina, Carex praegracilis - Juncus balticus, Cicuta douglasii - Carex nebrascensis, Distichlis spicata - Amphiscirpus nevadensis, Distichlis spicata - Nitrophila occidentalis, Eleocharis palustris - Juncus balticus, Eleocharis rostellata, Juncus balticus - Glaux maritima, Hippuris vulgaris - Triglochin maritima, Leymus triticoides - Juncus balticus, Schoenoplectus americanus, Spartina gracilis, and Triglochin maritima. Plant associations spanned a wetland gradient from seasonally moist to seasonally or perennially flooded, but surface water had left most stands at time of sampling. Mean Wetland Indicator Status scores and species composition help to place the plant associations within gradients in soil moisture and alkalinity. Seven of the 14 plant associations are listed in the International Vegetation Classification, and the remaining types are provisional Close

• 77. [Article] U.S. Department of Agriculture, U.S. Forest Service, Pacific Northwest Region, Portland, Oregon

  On February 11, 1998, the U.S. Forest Service (USFS) requested that a representative of NIOSH conduct a health hazard evaluation (HHE) to evaluate and compare timber marker's (also called Forestry Technicians) ...

  Citation × Citation Citation Abstract Copy Title: U.S. Department of Agriculture, U.S. Forest Service, Pacific Northwest Region, Portland, Oregon Author: Esswein, Eric J., National Institute for Occupational Safety and Health., Roegner, Kevin C. On February 11, 1998, the U.S. Forest Service (USFS) requested that a representative of NIOSH conduct a health hazard evaluation (HHE) to evaluate and compare timber marker's (also called Forestry Technicians) exposures to a new waterborne formulation of tree marking paint developed for use by the U.S. Forestry Service. NIOSH performed several previous investigations to document Forestry Technician's exposures to alkyd enamel tree marking paint traditionally used by the USFS for timber marking operations. On May 18, 1998, two NIOSH industrial hygienists met with USFS employees and management representatives in LaGrande, Oregon, where an opening conference was conducted to discuss details of this investigation which occurred on may 19-21, 1998, at the Little Bear timber sale in the Catherine Creek Wildlife Unit located approximately 25 miles southeast of LaGrande. Title: U.S. Department of Agriculture, U.S. Forest Service, Pacific Northwest Region, Portland, Oregon Author: Esswein, Eric J., National Institute for Occupational Safety and Health., Roegner, Kevin C. On February 11, 1998, the U.S. Forest Service (USFS) requested that a representative of NIOSH conduct a health hazard evaluation (HHE) to evaluate and compare timber marker's (also called Forestry Technicians) exposures to a new waterborne formulation of tree marking paint developed for use by the U.S. Forestry Service. NIOSH performed several previous investigations to document Forestry Technician's exposures to alkyd enamel tree marking paint traditionally used by the USFS for timber marking operations. On May 18, 1998, two NIOSH industrial hygienists met with USFS employees and management representatives in LaGrande, Oregon, where an opening conference was conducted to discuss details of this investigation which occurred on may 19-21, 1998, at the Little Bear timber sale in the Catherine Creek Wildlife Unit located approximately 25 miles southeast of LaGrande. Close

• 78. [Image] Vegetation and fire history of Ponderosa Pine - White Fir forest in Crater Lake National Park

  	ill., maps; Typescript (photocopy); Thesis (M.S.)-Oregon State University, 1975; Includes bibliographical references (leaves 120-127)
  	Citation × Citation Citation Abstract Copy Title: Vegetation and fire history of Ponderosa Pine - White Fir forest in Crater Lake National Park Author: McNeil, Robert Curlan Year: 1975, 2009, 2010 ill., maps; Typescript (photocopy); Thesis (M.S.)-Oregon State University, 1975; Includes bibliographical references (leaves 120-127) Title: Vegetation and fire history of Ponderosa Pine - White Fir forest in Crater Lake National Park Author: McNeil, Robert Curlan Year: 1975, 2009, 2010 ill., maps; Typescript (photocopy); Thesis (M.S.)-Oregon State University, 1975; Includes bibliographical references (leaves 120-127) Close

• 79. [Article] Biological opinion on effects of issuance of license for McKenzie (Bigelow) Hydropower Project on Upper Willamette River chinook salmon, its proposed critical habitat, and bull trout

  On March 24, 1999, the National Marine Fisheries Service (NMFS) published its final decision to list the Upper Willamette River evolutionarily significant unit (ESU) of chinook salmon as threatened under ...

  Citation × Citation Citation Abstract Copy Title: Biological opinion on effects of issuance of license for McKenzie (Bigelow) Hydropower Project on Upper Willamette River chinook salmon, its proposed critical habitat, and bull trout On March 24, 1999, the National Marine Fisheries Service (NMFS) published its final decision to list the Upper Willamette River evolutionarily significant unit (ESU) of chinook salmon as threatened under the Endangered Species Act (ESA). The effective date for the final listing was May 24, 1999, and the ESU is defined as 'all naturally spawned populations of spring-run chinook salmon residing below impassable natural barriers' (64 FR 14308). Critical habitat for this ESU was proposed on March 9, 1998 (63 FR 11482), and this proposed designation is still pending at the time of this Biological Opinion. Upper Willamette River chinook salmon occur within the action area of this consultation. The Upper Willamette River steelhead ESU was listed as threatened under the ESA (64 FR 14517; March 25, 1999) simultaneously with Upper Willamette River chinook salmon, but its range does not include the action area for this consultation 1 , and it is not addressed in this Biological Opinion. The objective of this Biological Opinion is to address the effects of providing a license to operate the McKenzie project, as proposed by FERC, on listed UW chinook salmon and bull trout, and to determine if this federal action by FERC will jeopardize the continued existence of either species. It will also serve as a conference opinion on the effects of the proposed action on proposed UW chinook salmon critical habitat. Until FERC issues a license for the McKenzie project incorporating the reasonable and prudent measures of this Biological Opinion, the existing project has no authorization for take of listed species Title: Biological opinion on effects of issuance of license for McKenzie (Bigelow) Hydropower Project on Upper Willamette River chinook salmon, its proposed critical habitat, and bull trout On March 24, 1999, the National Marine Fisheries Service (NMFS) published its final decision to list the Upper Willamette River evolutionarily significant unit (ESU) of chinook salmon as threatened under the Endangered Species Act (ESA). The effective date for the final listing was May 24, 1999, and the ESU is defined as 'all naturally spawned populations of spring-run chinook salmon residing below impassable natural barriers' (64 FR 14308). Critical habitat for this ESU was proposed on March 9, 1998 (63 FR 11482), and this proposed designation is still pending at the time of this Biological Opinion. Upper Willamette River chinook salmon occur within the action area of this consultation. The Upper Willamette River steelhead ESU was listed as threatened under the ESA (64 FR 14517; March 25, 1999) simultaneously with Upper Willamette River chinook salmon, but its range does not include the action area for this consultation 1 , and it is not addressed in this Biological Opinion. The objective of this Biological Opinion is to address the effects of providing a license to operate the McKenzie project, as proposed by FERC, on listed UW chinook salmon and bull trout, and to determine if this federal action by FERC will jeopardize the continued existence of either species. It will also serve as a conference opinion on the effects of the proposed action on proposed UW chinook salmon critical habitat. Until FERC issues a license for the McKenzie project incorporating the reasonable and prudent measures of this Biological Opinion, the existing project has no authorization for take of listed species Close

• 80. [Article] Classification of native vegetation of Oregon

  This classification lists the native plant associations known to occur in Oregon, and includes both successional and climax vegetation types that were an important part of the presettlement landscape of ...

  Citation × Citation Citation Abstract Copy Title: Classification of native vegetation of Oregon Author: Institute for Natural Resources, Christy, John A., Titus, Jonathan A., Oregon Natural Heritage Information Center, Kagan, James S., Murray, Michael P. This classification lists the native plant associations known to occur in Oregon, and includes both successional and climax vegetation types that were an important part of the presettlement landscape of Oregon. It serves as an index to the diversity, distribution and relative rarity of the state's native plant associations, and as a guide to their literature. Plant assocations are listed by scientific name, followed by common name and acronym. Listings include the global and state rank of each association, the ecoregion in which it occurs, its status as wetland or upland, and references describing the association. A bibliography lists all cited references. The classification is presented in a spreadsheet format, but can also be imported into a database format. Published and unpublished reports were the primary sources for the classification. Descriptions supported by quantitative data were used whenever possible. Publications from other states or provinces in the Pacific Northwest were used for associations known to occur in, but not described from Oregon. Sampling methods and concepts of species and associations differ greatly among researchers. To accommodate variation occurring in the field, some associations have been lumped. Title: Classification of native vegetation of Oregon Author: Institute for Natural Resources, Christy, John A., Titus, Jonathan A., Oregon Natural Heritage Information Center, Kagan, James S., Murray, Michael P. This classification lists the native plant associations known to occur in Oregon, and includes both successional and climax vegetation types that were an important part of the presettlement landscape of Oregon. It serves as an index to the diversity, distribution and relative rarity of the state's native plant associations, and as a guide to their literature. Plant assocations are listed by scientific name, followed by common name and acronym. Listings include the global and state rank of each association, the ecoregion in which it occurs, its status as wetland or upland, and references describing the association. A bibliography lists all cited references. The classification is presented in a spreadsheet format, but can also be imported into a database format. Published and unpublished reports were the primary sources for the classification. Descriptions supported by quantitative data were used whenever possible. Publications from other states or provinces in the Pacific Northwest were used for associations known to occur in, but not described from Oregon. Sampling methods and concepts of species and associations differ greatly among researchers. To accommodate variation occurring in the field, some associations have been lumped. Close