Index Catalog // ScholarsArchive@OSU

Habitat utilization by spotted owls in the West-Central Cascades of Oregon

Creator:: Forsman, Eric D.
Abstract:: Eight adult spotted owls (Strix occidentalis) on the west slope of the Cascade Range in Oregon were fitted with radio transmitters and observed for periods ranging from 271 to 383 days. Mean home range size for the owls was 1,177 ha (range = 920-1,376 ha). There was no significant difference...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Eric D. Forsman for the degree of

A preliminary investigation of the spotted owl in Oregon

Creator:: Forsman, Eric D.
Abstract:: Between 1970 and 1974, data were collected on the distribution and biology of the spotted owl (Strix occidentalis) in Oregon. One-hundred and sixteen pairs and seven single birds were located. Spotted owls occurred throughout the mountains of western Oregon and on the east slope of the Cascade Range at least...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF ERIC FORSMAN for the

Glennetal_ClimateandSpottedOwlPopulationTrends_biolconservation_revised23june2010.pdf

Creator:: Glenn, Elizabeth M., Anthony, Robert G., and Forsman, Eric D.
Abstract:: We used reverse time capture-mark-recapture models to describe associations between rate of population change (λ) and climate for northern spotted owls (Strix occidentalis caurina) at six long-term study areas in Washington and Oregon, USA. Populations in three of six areas showed strong evidence of declining populations, while populations in two...
Full Text:: State University, Corvallis, OR 97331, USA 4 , Robert G. Anthony2, and Eric D. Forsman3 3 2 U.S

OnlineSupportingINformation_Glennetal_PoptrendsNSO_biolconserv.pdf

Creator:: Glenn, Elizabeth M., Anthony, Robert G., and Forsman, Eric D.
Abstract:: We used reverse time capture-mark-recapture models to describe associations between rate of population change (λ) and climate for northern spotted owls (Strix occidentalis caurina) at six long-term study areas in Washington and Oregon, USA. Populations in three of six areas showed strong evidence of declining populations, while populations in two...
Full Text:: precipitation (B), number of days with storms (C), total winter snowfall (D), number of days with temperatures

Competitive Interactions and Resource Partitioning Between Northern Spotted Owls and Barred Owls in Western Oregon

Creator:: Wiens, J. David, Anthony, Robert G., and Forsman, Eric D.
Abstract:: The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted...
Resource Type:: Article
Full Text:: University, Corvallis, OR 97331, USA ERIC D. FORSMAN, USDA Forest Service, Pacific Northwest Research

Population trends in northern spotted owls: Associations with climate in the Pacific Northwest

Creator:: Glenn, Elizabeth M., Anthony, Robert G., and Forsman, Eric D.
Abstract:: We used reverse time capture-mark-recapture models to describe associations between rate of population change (λ) and climate for northern spotted owls (Strix occidentalis caurina) at six long-term study areas in Washington and Oregon, USA. Populations in three of six areas showed strong evidence of declining populations, while populations in two...
Resource Type:: Article

Home Range and Habitat Selection by Northern Spotted Owls on the Eastern Slope of the Cascade Mountains, Washington

Creator:: Forsman, Eric D., Sovern, Stan G., Taylor, Margaret, and Biswell, Brian L.
Abstract:: We used radiotelemetry to study space use and habitat selection of 16 Northern Spotted Owls (Strix occidentalis caurina) on the eastern slope of the Cascade Mountains, Washington, U.S.A., in 1989–1990. We used a geographical information system (GIS) and aerial photo interpretation of digital orthophotos to assign owl locations a value...
Resource Type:: Article
Full Text:: SPOTTED OWLS ON THE EASTERN SLOPE OF THE CASCADE MOUNTAINS, WASHINGTON ERIC D. FORSMAN U.S.D.A. Forest

Roosting Habitat Use and Selection By Northern Spotted Owls During Natal Dispersal

Creator:: Sovern, Stan G., Forsman, Eric D., Dugger, Katie M., and Taylor, Margaret
Abstract:: We studied habitat selection by northern spotted owls (Strix occidentalis caurina) during natal dispersal in Washington State, USA, at both the roost site and landscape scales. We used logistic regression to obtain parameters for an exponential resource selection function based on vegetation attributes in roost and random plots in 76...
Resource Type:: Article
Full Text:: , Corvallis, OR 97331, USA ERIC D. FORSMAN, USDA Forest Service, Corvallis Forestry Sciences Laboratory, 3200

SovernStanFisheriesWildlifeBarredOwlsLandscape_SupportingInformation.pdf

Creator:: Sovern, Stan G., Forsman, Eric D., Olson, Gail S., Biswell, Brian L., Taylor, Margaret, and Anthony, Robert G.
Abstract:: We used multi-season occupancy analyses to model 2 fates of northern spotted owl territories in relation to habitat amount, habitat fragmentation, and the presence of barred owls in Washington State, USA, 1989–2005. Local colonization is the probability a territory unoccupied by a spotted owl in year i would be occupied...

SovernStanFisheriesWildlifeBarredOwlsLandscape.pdf

Creator:: Sovern, Stan G., Forsman, Eric D., Olson, Gail S., Biswell, Brian L., Taylor, Margaret, and Anthony, Robert G.
Abstract:: We used multi-season occupancy analyses to model 2 fates of northern spotted owl territories in relation to habitat amount, habitat fragmentation, and the presence of barred owls in Washington State, USA, 1989–2005. Local colonization is the probability a territory unoccupied by a spotted owl in year i would be occupied...
Full Text:: 97331, USA ERIC D. FORSMAN, USDA Forest Service, Pacific Northwest Research Station, 3200 S.W

ScholarsArchive@OSU

Habitat utilization by spotted owls in the West-Central Cascades of Oregon

A preliminary investigation of the spotted owl in Oregon

Glennetal_ClimateandSpottedOwlPopulationTrends_biolconservation_revised23june2010.pdf

OnlineSupportingINformation_Glennetal_PoptrendsNSO_biolconserv.pdf

Competitive Interactions and Resource Partitioning Between Northern Spotted Owls and Barred Owls in Western Oregon

Population trends in northern spotted owls: Associations with climate in the Pacific Northwest

Home Range and Habitat Selection by Northern Spotted Owls on the Eastern Slope of the Cascade Mountains, Washington

Roosting Habitat Use and Selection By Northern Spotted Owls During Natal Dispersal

SovernStanFisheriesWildlifeBarredOwlsLandscape_SupportingInformation.pdf

SovernStanFisheriesWildlifeBarredOwlsLandscape.pdf

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