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• 11. [Article] Aquatic & Riparian Habitat Evaluation for the McKenzie-Willamette River Confluence (Project #99-101)

  Abstract -- These files contain reports, GIS maps, photos, and accompanying metadata and files developed for the McKenzie-Willamette Confluence Study and the McKenzie River Subbasin Assessment of 2000....

  Citation × Citation Citation Abstract Copy Title: Aquatic & Riparian Habitat Evaluation for the McKenzie-Willamette River Confluence (Project #99-101) Abstract -- These files contain reports, GIS maps, photos, and accompanying metadata and files developed for the McKenzie-Willamette Confluence Study and the McKenzie River Subbasin Assessment of 2000. Title: Aquatic & Riparian Habitat Evaluation for the McKenzie-Willamette River Confluence (Project #99-101) Abstract -- These files contain reports, GIS maps, photos, and accompanying metadata and files developed for the McKenzie-Willamette Confluence Study and the McKenzie River Subbasin Assessment of 2000. Close

• 12. [Article] Bear Creek Watershed Assessment, Phase II - Bear Creek Tributary Assessment

  Abstract -- This document assesses 21 tributary sub-basins in the Bear Creek watershed in terms of history, physiography and physical structure, human demographic characteristics, channel morphology, and ...

  Citation × Citation Citation Abstract Copy Title: Bear Creek Watershed Assessment, Phase II - Bear Creek Tributary Assessment Abstract -- This document assesses 21 tributary sub-basins in the Bear Creek watershed in terms of history, physiography and physical structure, human demographic characteristics, channel morphology, and riparian habitat. It concludes with a comparison, and technical prioritization, of conditions across sub-basins. Title: Bear Creek Watershed Assessment, Phase II - Bear Creek Tributary Assessment Abstract -- This document assesses 21 tributary sub-basins in the Bear Creek watershed in terms of history, physiography and physical structure, human demographic characteristics, channel morphology, and riparian habitat. It concludes with a comparison, and technical prioritization, of conditions across sub-basins. Close

• 13. [Article] Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range

  This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/forest-ecology-and-management/. To the best of our knowledge, one ...

  Citation × Citation Citation Abstract Copy Title: Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range Author: Li, Judith, Jenkins, Stephanie, Hagar, Joan C., Sobota, Janel This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/forest-ecology-and-management/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Title: Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range Author: Li, Judith, Jenkins, Stephanie, Hagar, Joan C., Sobota, Janel This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/forest-ecology-and-management/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Close

• 14. [Article] Riparian and wetland vegetation of central and eastern Oregon

  The structure and components of riparian areas influence the rate, amount, and timing of water, nutrients, organic debris, and inorganic materials that enter streams and rivers. The energy of floodwaters ...

  Citation × Citation Citation Abstract Copy Title: Riparian and wetland vegetation of central and eastern Oregon Author: Institute for Natural Resources, Kovalchik, Bernard L., Kerr, Marie Jeannette James, 1968-, Oregon Natural Heritage Information Center, Crowe, Elizabeth A. (Elizabeth Ann), 1963- The structure and components of riparian areas influence the rate, amount, and timing of water, nutrients, organic debris, and inorganic materials that enter streams and rivers. The energy of floodwaters and their ultimate volume, timing and erosive power is influenced by the soils, vegetation and geomorphology of fluvial surfaces within valley bottoms. Decades of intensive use of riparian areas and other wetlands in central and eastern Oregon have caused substantial degradation of their ecological structure, composition and function. Rehabilitation, restoration and monitoring of wetland ecosystems is currently a high priority for many land management agencies and landowners. In order to improve conditions in these habitats, an understanding of wetland ecosystems is necessary. Title: Riparian and wetland vegetation of central and eastern Oregon Author: Institute for Natural Resources, Kovalchik, Bernard L., Kerr, Marie Jeannette James, 1968-, Oregon Natural Heritage Information Center, Crowe, Elizabeth A. (Elizabeth Ann), 1963- The structure and components of riparian areas influence the rate, amount, and timing of water, nutrients, organic debris, and inorganic materials that enter streams and rivers. The energy of floodwaters and their ultimate volume, timing and erosive power is influenced by the soils, vegetation and geomorphology of fluvial surfaces within valley bottoms. Decades of intensive use of riparian areas and other wetlands in central and eastern Oregon have caused substantial degradation of their ecological structure, composition and function. Rehabilitation, restoration and monitoring of wetland ecosystems is currently a high priority for many land management agencies and landowners. In order to improve conditions in these habitats, an understanding of wetland ecosystems is necessary. Close

• 15. [Article] Small mammal distribution, abundance and habitat selection in managed riparian habitats of Bear Valley, eastern Oregon

  Riparian zones are critical habitats for management because of their importance for both cattle production and wildlife, and a high potential for resource conflicts. Riparian management should address ...

  Citation × Citation Citation Abstract Copy Title: Small mammal distribution, abundance and habitat selection in managed riparian habitats of Bear Valley, eastern Oregon Author: Tomas, Walfrido Moraes Riparian zones are critical habitats for management because of their importance for both cattle production and wildlife, and a high potential for resource conflicts. Riparian management should address habitat and microhabitat features that sustain both livestock production and wildlife diversity. I conducted a study to determine how small mammal distributions and abundance differ among 3 structurally different riparian habitats in eastern Oregon. The 3 habitat types, herbaceous, discontinuous willow, and continuous willow, represent a range of habitats typical of riparian zones in central and eastern Oregon. I estimated small mammal population sizes in 9 trap grids placed in riparian zones using capture-recapture techniques. Four species of small mammals were captured during 7 trapping periods from August 1994 to September 1995. Small mammal distributions and population sizes of each species varied both within and among riparian pastures. Montane voles (Microtus montanus) were the most abundant species in all grids. Deer mice (Peromyscus maniculatus) had high population sizes in grids with low montane vole populations and moderate to high willow cover. Competition with voles appeared to occur in riparian habitats of Bear Valley, and influenced the distribution and numbers of deer mice. Western jumping mice (Zapus princeps) were captured at relatively low numbers and almost exclusively in continuous willow habitats. Vagrant shrews (Sorex vagrans) were captured on all grids, and population sizes were small. Haying negatively affected survival rates of voles. Biomass, vegetation height, and percent ground cover were the habitat variables most frequently associated with occurrence of montane voles in Bear Valley. The probability of occurrence of this species was positively correlated with these habitat variables. Deer mice probability of occurrence was positively correlated with percent ground cover, plant biomass, and soil moisture. Most deer mice captures occurred in continuous willow habitats, and the number of captures increased with willow basal cover (R²=0.7579, P<0.001). Western jumping mice occurrence was positively correlated with plant biomass and soil moisture, and negatively correlated with distance from willow and percent ground cover. Western jumping mice also were more frequently captured in willow than nonwillow vegetation associations (P=0.054) within continuous willow habitats. Vagrant shrews were positively associated with plant biomass, vegetation height, and soil moisture. Small mammal habitat associations from my study sites in Bear Valley are in agreement with the literature, suggesting relatively consistent patterns in species-habitat associations. Distribution of small mammal species differed among pastures probably as a result of historical management practices. Alterations of riparian zone structure from historical management practices were evident in the study area, including elimination or decreased willow density, channel entrenchment, and invasion of riparian areas by xeric vegetation. Western jumping mice are apparently the most sensitive species in this area, requiring dense willow stands, suggesting that jumping mice could serve as an indicator species for riparian habitat condition. Title: Small mammal distribution, abundance and habitat selection in managed riparian habitats of Bear Valley, eastern Oregon Author: Tomas, Walfrido Moraes Riparian zones are critical habitats for management because of their importance for both cattle production and wildlife, and a high potential for resource conflicts. Riparian management should address habitat and microhabitat features that sustain both livestock production and wildlife diversity. I conducted a study to determine how small mammal distributions and abundance differ among 3 structurally different riparian habitats in eastern Oregon. The 3 habitat types, herbaceous, discontinuous willow, and continuous willow, represent a range of habitats typical of riparian zones in central and eastern Oregon. I estimated small mammal population sizes in 9 trap grids placed in riparian zones using capture-recapture techniques. Four species of small mammals were captured during 7 trapping periods from August 1994 to September 1995. Small mammal distributions and population sizes of each species varied both within and among riparian pastures. Montane voles (Microtus montanus) were the most abundant species in all grids. Deer mice (Peromyscus maniculatus) had high population sizes in grids with low montane vole populations and moderate to high willow cover. Competition with voles appeared to occur in riparian habitats of Bear Valley, and influenced the distribution and numbers of deer mice. Western jumping mice (Zapus princeps) were captured at relatively low numbers and almost exclusively in continuous willow habitats. Vagrant shrews (Sorex vagrans) were captured on all grids, and population sizes were small. Haying negatively affected survival rates of voles. Biomass, vegetation height, and percent ground cover were the habitat variables most frequently associated with occurrence of montane voles in Bear Valley. The probability of occurrence of this species was positively correlated with these habitat variables. Deer mice probability of occurrence was positively correlated with percent ground cover, plant biomass, and soil moisture. Most deer mice captures occurred in continuous willow habitats, and the number of captures increased with willow basal cover (R²=0.7579, P<0.001). Western jumping mice occurrence was positively correlated with plant biomass and soil moisture, and negatively correlated with distance from willow and percent ground cover. Western jumping mice also were more frequently captured in willow than nonwillow vegetation associations (P=0.054) within continuous willow habitats. Vagrant shrews were positively associated with plant biomass, vegetation height, and soil moisture. Small mammal habitat associations from my study sites in Bear Valley are in agreement with the literature, suggesting relatively consistent patterns in species-habitat associations. Distribution of small mammal species differed among pastures probably as a result of historical management practices. Alterations of riparian zone structure from historical management practices were evident in the study area, including elimination or decreased willow density, channel entrenchment, and invasion of riparian areas by xeric vegetation. Western jumping mice are apparently the most sensitive species in this area, requiring dense willow stands, suggesting that jumping mice could serve as an indicator species for riparian habitat condition. Close

• 16. [Article] Teeter Creek aquatic and riparian habitat restoration environmental assessment and finding of no significant impact

  13 pp. Maps, illus. The location of the project area is T. 20 and 21 S., R. 1 and 2 W., W.M. Captured July 13, 2007.

  Citation × Citation Citation Abstract Copy Title: Teeter Creek aquatic and riparian habitat restoration environmental assessment and finding of no significant impact Author: United States. Bureau of Land Management. Eugene District Year: 2008, 2006 13 pp. Maps, illus. The location of the project area is T. 20 and 21 S., R. 1 and 2 W., W.M. Captured July 13, 2007. Title: Teeter Creek aquatic and riparian habitat restoration environmental assessment and finding of no significant impact Author: United States. Bureau of Land Management. Eugene District Year: 2008, 2006 13 pp. Maps, illus. The location of the project area is T. 20 and 21 S., R. 1 and 2 W., W.M. Captured July 13, 2007. Close

• 17. [Article] Lower Middle Fork Willamette River Watershed Assessment

  Abstract -- This watershed assessment includes the following topics: land forms and geology, land ownership and uses, hydrology, riparian habitat conditions, aquatic habitat and fish populations, wetland ...

  Citation × Citation Citation Abstract Copy Title: Lower Middle Fork Willamette River Watershed Assessment Abstract -- This watershed assessment includes the following topics: land forms and geology, land ownership and uses, hydrology, riparian habitat conditions, aquatic habitat and fish populations, wetland habitat conditions, water quality, and sediment sources. Title: Lower Middle Fork Willamette River Watershed Assessment Abstract -- This watershed assessment includes the following topics: land forms and geology, land ownership and uses, hydrology, riparian habitat conditions, aquatic habitat and fish populations, wetland habitat conditions, water quality, and sediment sources. Close

• 18. [Article] Small-mammal herpetofauna abundance in riparian and upslope areas of five forest conditions

  I compared species composition and relative abundance of'small mammals and herpetofauna between riparian and upslope habitats among 5 forest types. Riparian- and upslope- associated species were identified based ...

  Citation × Citation Citation Abstract Copy Title: Small-mammal herpetofauna abundance in riparian and upslope areas of five forest conditions Author: Gomez, Douglas M. I compared species composition and relative abundance of'small mammals and herpetofauna between riparian and upslope habitats among 5 forest types. Riparian- and upslope- associated species were identified based on capture frequency. Small mammal species richness was similar between stream and upslope habitats and among the 5 forest types. There were differences (P<0.05) in the abundances of 9 small mammal species among forest types. The total captures of small mammals was highest in deciduous stands and progressively lower from shrub to old-growth coniferous forests. Neurotrichus gibbsii, Sorex bendirii, Sorex pacificus, Microtus longicaudus, Microtus townsendii, Phenacomys albioes, and Zapus trinotatus were captured in higher numbers in riparian than in upslope habitats; Sorex pacificus, Microtus longicaudus, and Phenacomys albioes may be considered riparian associated species; and S. bendirii may an obligate of riparian habitat. In contrast, Clethrionomys californicus showed a strong association with upslope habitats. Herpetofauna species richness was similar among forest types but slightly greater in the shrub stands. The abundances of 3 of herpetofauna species differed among forest types. Total captures of herpetofauna was highest in deciduous forests, intermediate in the mature conifer forests, and lowest in the 2 younger forest types. Herpetofauna species richness was similar between stream and upslope habitats, however captures of this group were higher in riparian than upslope habitat. Ascaphus truei, Plethodon dunni, Taricha qranulosa, Dicamptodon tenebrosus and Rana aurora had higher captures in riparian than upslope habitats; Taricha qranulosa and Dicamptodon tenebrosus may be considered riparian associated species; and Ascaphus truei and Plethodon dunni may be obligates of riparian habitat. E. eschscholtzi was associated with upslope habitats. I described riparian microhabitat components important to capture of small mammals and herpetofauna. S. bendirii was found only associated with intermittent streams in upslope habitats, and A. truei was positively correlated with stream depth, additional evidence that these 2 species were associated with riparian habitat. S. pacificus, N. gibbsii, P. albipes, M. longicaudus, and Z. trinotatus were associated with deciduous vegetation. In addition, M. longicaudus was positively correlated with the number of logs. The high abundance of Z. trinotatus along streams was associated with herbaceous vegetation. This is supported by it's high abundance in shrub stands where herbaceous cover is high. C. californicus was captured most frequently in mature and old-growth forests, it was associated with deep litter and abundant snags. The results suggested that small (second- third- and fourth- order) riparian systems and adjacent upslope areas may provide important habitat to some small mammals and herpetofauna on the Oregon Coast Ranges. It is vital that these systems be considered in management plans which include the protection of at least some of these areas from timber harvest. Title: Small-mammal herpetofauna abundance in riparian and upslope areas of five forest conditions Author: Gomez, Douglas M. I compared species composition and relative abundance of'small mammals and herpetofauna between riparian and upslope habitats among 5 forest types. Riparian- and upslope- associated species were identified based on capture frequency. Small mammal species richness was similar between stream and upslope habitats and among the 5 forest types. There were differences (P<0.05) in the abundances of 9 small mammal species among forest types. The total captures of small mammals was highest in deciduous stands and progressively lower from shrub to old-growth coniferous forests. Neurotrichus gibbsii, Sorex bendirii, Sorex pacificus, Microtus longicaudus, Microtus townsendii, Phenacomys albioes, and Zapus trinotatus were captured in higher numbers in riparian than in upslope habitats; Sorex pacificus, Microtus longicaudus, and Phenacomys albioes may be considered riparian associated species; and S. bendirii may an obligate of riparian habitat. In contrast, Clethrionomys californicus showed a strong association with upslope habitats. Herpetofauna species richness was similar among forest types but slightly greater in the shrub stands. The abundances of 3 of herpetofauna species differed among forest types. Total captures of herpetofauna was highest in deciduous forests, intermediate in the mature conifer forests, and lowest in the 2 younger forest types. Herpetofauna species richness was similar between stream and upslope habitats, however captures of this group were higher in riparian than upslope habitat. Ascaphus truei, Plethodon dunni, Taricha qranulosa, Dicamptodon tenebrosus and Rana aurora had higher captures in riparian than upslope habitats; Taricha qranulosa and Dicamptodon tenebrosus may be considered riparian associated species; and Ascaphus truei and Plethodon dunni may be obligates of riparian habitat. E. eschscholtzi was associated with upslope habitats. I described riparian microhabitat components important to capture of small mammals and herpetofauna. S. bendirii was found only associated with intermittent streams in upslope habitats, and A. truei was positively correlated with stream depth, additional evidence that these 2 species were associated with riparian habitat. S. pacificus, N. gibbsii, P. albipes, M. longicaudus, and Z. trinotatus were associated with deciduous vegetation. In addition, M. longicaudus was positively correlated with the number of logs. The high abundance of Z. trinotatus along streams was associated with herbaceous vegetation. This is supported by it's high abundance in shrub stands where herbaceous cover is high. C. californicus was captured most frequently in mature and old-growth forests, it was associated with deep litter and abundant snags. The results suggested that small (second- third- and fourth- order) riparian systems and adjacent upslope areas may provide important habitat to some small mammals and herpetofauna on the Oregon Coast Ranges. It is vital that these systems be considered in management plans which include the protection of at least some of these areas from timber harvest. Close

• 19. [Article] A Vegetation Survey of the Oak Creek Riparian Zone at the Oak Creek Center for Urban Horticulture

  A project to restore and increase the native riparian habitat on a 1 ½ acre site along Oak Creek will begin in spring 2013. In order to carry out long-term monitoring and evaluation of the efficacy of ...

  Citation × Citation Citation Abstract Copy Title: A Vegetation Survey of the Oak Creek Riparian Zone at the Oak Creek Center for Urban Horticulture Author: Danler, Signe A project to restore and increase the native riparian habitat on a 1 ½ acre site along Oak Creek will begin in spring 2013. In order to carry out long-term monitoring and evaluation of the efficacy of the restoration effort, it is necessary to know what is growing there now. To that end I have conducted a multi-part inventory of the current vegetation, to establish baselines of species diversity and coverage, canopy cover, and percentage of native and invasive species against which to measure progress. The current vegetation is a mix of native species and exotics. The tree canopy is a narrow strip along the creek banks, and there are not very many trees in it, but those present are primarily native species. This survey confirms that there is a growing problem with several Class B Noxious weeds that are likely to take over the understory if not checked. These results demonstrate a clear need for a restoration and management plan focused on increasing the native understory cover and on increasing the width of the overstory canopy. This plan should be combined with a strong, long-term institutional commitment to keep the invasive species under control. In addition there are possibilities for expanding the restored area through collaboration with other OSU departments that manage nearby stretches of Oak Creek. Title: A Vegetation Survey of the Oak Creek Riparian Zone at the Oak Creek Center for Urban Horticulture Author: Danler, Signe A project to restore and increase the native riparian habitat on a 1 ½ acre site along Oak Creek will begin in spring 2013. In order to carry out long-term monitoring and evaluation of the efficacy of the restoration effort, it is necessary to know what is growing there now. To that end I have conducted a multi-part inventory of the current vegetation, to establish baselines of species diversity and coverage, canopy cover, and percentage of native and invasive species against which to measure progress. The current vegetation is a mix of native species and exotics. The tree canopy is a narrow strip along the creek banks, and there are not very many trees in it, but those present are primarily native species. This survey confirms that there is a growing problem with several Class B Noxious weeds that are likely to take over the understory if not checked. These results demonstrate a clear need for a restoration and management plan focused on increasing the native understory cover and on increasing the width of the overstory canopy. This plan should be combined with a strong, long-term institutional commitment to keep the invasive species under control. In addition there are possibilities for expanding the restored area through collaboration with other OSU departments that manage nearby stretches of Oak Creek. Close

• 20. [Article] Nest trees of northern flying squirrels in the Sierra Nevada

  We examined the nest-tree preferences of northern flying squirrels (Glaucomys sabrinus) in an old-growth, mixed-conifer and red fir (Abies magnifica) forest of the southern Sierra Nevada of California. ...

  Citation × Citation Citation Abstract Copy Title: Nest trees of northern flying squirrels in the Sierra Nevada Author: North, Malcolm P., Meyer, Marc D., Kelt, Douglas A. We examined the nest-tree preferences of northern flying squirrels (Glaucomys sabrinus) in an old-growth, mixed-conifer and red fir (Abies magnifica) forest of the southern Sierra Nevada of California. We tracked 27 individuals to 122 nest trees during 3 summers. Flying squirrels selected nest trees that were larger in diameter and taller than either random trees or large (.50-cm diameter at breast height) nearest-neighbor trees. Snags were used more often than live trees relative to their availability. Nest trees were usually close to riparian habitat; 86% of nest trees were ,150 m from a perennial creek. Flying squirrels selected red fir and avoided incense cedar (Calocedrus decurrens). Mean distances between nest trees and size of core-nest areas were greater for males than for females. No detectable relationship was found between size of core-nest area and distance to a perennial creek. These results suggest that flying squirrels of the Sierra Nevada may require large trees and snags within 150 m of perennial creeks for their critical habitat needs. Title: Nest trees of northern flying squirrels in the Sierra Nevada Author: North, Malcolm P., Meyer, Marc D., Kelt, Douglas A. We examined the nest-tree preferences of northern flying squirrels (Glaucomys sabrinus) in an old-growth, mixed-conifer and red fir (Abies magnifica) forest of the southern Sierra Nevada of California. We tracked 27 individuals to 122 nest trees during 3 summers. Flying squirrels selected nest trees that were larger in diameter and taller than either random trees or large (.50-cm diameter at breast height) nearest-neighbor trees. Snags were used more often than live trees relative to their availability. Nest trees were usually close to riparian habitat; 86% of nest trees were ,150 m from a perennial creek. Flying squirrels selected red fir and avoided incense cedar (Calocedrus decurrens). Mean distances between nest trees and size of core-nest areas were greater for males than for females. No detectable relationship was found between size of core-nest area and distance to a perennial creek. These results suggest that flying squirrels of the Sierra Nevada may require large trees and snags within 150 m of perennial creeks for their critical habitat needs. Close