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185 results found
Knowledge of regional-scale patterns of ecological community structure, and of factors that control them, is largely conceptual. Regional- and local-scale factors associated with regional variation in community composition have not been quantified. We analyzed data on woody plant species abundance…
Author(s): J.L. Ohmann, T.A. Spies
Keywords: Canonical correspondence analysis, forest ecology, gradient analysis, Oregon, plant communities, regional vegetation analysis, species diversity, variance partitioning, woody plants
Source: Ecological Monographs. 68(2): 151-182
Year: 1998
Silvicultural prescriptions to enhance northern flying squirrel (Glaucoinys sabrinus) habitat have been suggested as an aid for recovery of the threatened northern spotted owl (Strix occidentalis caurina). Flying squirrels are hypothesized to be limited by den sites (cavities in…
Author(s): A.B. Carey, T.M. Wilson, C.C. Maguire, B.L. Biswell
Keywords: cavity, den, Glaucomys sabrinus, nest, northern flying squirrel, old growth, Oregon, Pacific Northwest, prey, spotted owl, telemetry, Washington
Source: Journal of Wildlife Management. 61(3): 684-699
Year: 1997
Understanding ecological processes and their spatial scales is key to managing ecosystems for biodiversity, especially for species associated with late-seral forest. We focused on 2 species of squirrel (Sciuridae: northern flying squirrel, Glaucomys sabrinus, and Townsend's chipmunk, Tamias…
Author(s): A.B. Carey, J. Kershner, B. Biswell, L.S. Dominguez de Toledo
Keywords: ecological scale, forest development, Glaucomys sabrinus, habitat, northern flying squirrel, Oregon, Tamias townsendii, Townsend's chipmunk
Source: Wildlife Monographs. 142: 1-71
Year: 1999
Information is needed on the great gray owl to understand its ecology and to consider this species in land management decisions. From 1982 to 1988, we studied 24 pairs and 107 juvenile great gray owls in northeastern Oregon. Forty-nine nests were located; 16 were used more than once, so we observed…
Author(s): Evelyn L. Bull, Mark G. Henjum
Keywords: Owl, great gray owl, management, conifer forest, Oregon
Source: Gen. Tech. Rep. PNW-GTR-265. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 39 p
Year: 1990
Arboreal rodents in Douglas-fir forests west of the Cascade crest in Oregon and Washington include (listed in decreasing order of dependence on trees) red tree vole (Phenacomys longicaucfus), northern flying squirrel (Glaucomys sabrinus), Douglas' squirrel (Tamiasciurus…
Author(s): Andrew B. Carey
Keywords: Bushy-tailed woodrat, Douglas’ squirrel, dusky-footed woodrat, northern flying squirrel, old growth, red tree vole, Townsend’s chipmunk, Oregon, Washington
Source: Gen. Tech. Rep. PNW-GTR-276. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 46 p. (Huff, Mark H.; Holthausen, Richard S.; Aubry, Keith B., tech. coords.; Biology and management of old-growth forests)
Year: 1991
Research results from the value-added research and demonstration program for western hardwoods are summarized in this report. The intent of the program was to enhance the economy of the Pacific Northwest by helping local communities and forest industries produce wood products more efficiently.…
Author(s): D. W. Green, W. W. Von Segen, S. A. Willits
Keywords: Hardwoods, Wood utilization, Research, Wood properties, Markets, Forest management, Pacific Northwest States of USA, Oregon, Washington, Red alder
Source: (General technical report FPL ; GTR-85):43 p. : ill. ; 28 cm.
Year: 1995
Forest managers in the Pacific Northwest are faced with new challenges of providing for all wildlife in managed forests. Our objective was to elucidate the factors governing the composition and biomass of forest floor mammal communities that are amenable to management. We sampled small mammal…
Author(s): A.B. Carey, M.L. Johnson
Keywords: biodiversity, Clethrionomys, forest ecology, habitat, mammal communities, micro-habitat, Microtus, Neurotrichus, old growth, Olympic Peninsula, Oregon, Peromyscus, silviculture, Sorex, Washington
Source: Ecological Applications. 5(2): 336-352
Year: 1995
Home ranges of 14 pairs of spotted owls (Strix occidentalis) were studied over four to six seasons in three southwest Oregon landscapes that differed in prey base and degree of forest fragmentation. The general theory of space use and the biology of spotted owls was used to construct a…
Author(s): A.B. Carey, K.C. Peeler
Keywords: home range, optimal foraging, Oregon, space use, spotted owl, Strix occidentalis
Source: Journal of Raptor Research. 29(4): 223-239
Year: 1995
We studied prey populations and the use and composition of home ranges of 47 Northern Spotted Owls (Strix occidentalis caurina) over 12 mo in five landscapes in two forest types in southwestern Oregon. We measured 1-yr home ranges of 23 owl pairs, 2-yr home ranges of 13 pairs, and 3-yr…
Author(s): A.B. Carey, S.P. Horton, B.L. Biswell
Keywords: bushy-tailed woodrat, dusky footed woodrat, foraging behavior, Great Horned Owl, habitat selection, home range, landscape ecology, northern flying squirrel, Oregon, Spotted Owl, telemetry, Washington
Source: Ecological Monographs. 62(2): 223-250
Year: 1992
Forest resources in Washington and Oregon were surveyed in the early 1930s by employees of the Pacific Northwest Forest Experiment Station (the original name of the current Pacific Northwest Research Station). This was the first of many periodic forest surveys conducted nationwide by the USDA…
Author(s): Constance A. Harrington
Keywords: Forest inventory, forest survey, 1930s, forest cover, forest type maps, Washington, Oregon, Douglas-fir region, ponderosa pine region
Source: Gen. Tech. Rep. PNW-GTR-584. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 123 p. [plus CD-ROM]
Year: 2003