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  • Evaluating space use and pesticide exposure risk for burrowing owls in an agricultural environment

    Creator:
    Gervais, Jennifer A.
    Abstract:
    Large burrowing owl (Aihene cunicularia) populations exist in areas of intensive agriculture in California, and pesticide exposure has been identified as a potential threat to population persistence. I evaluated breeding season use of agricultural fields by adult male owls using radio telemetry, and examined egg contaminant residues to estimate population-level...
    Resource Type:
    Dissertation
    Full Text:
    : Robert G. Anthony Large burrowing owl (Aihene cunicularia) populations exist in areas of Intensive

  • Abundance and habitat associations of Washington ground squirrels in north-central Oregon

    Creator:
    Greene, Eric
    Abstract:
    Much of the Columbia River Basin has been cultivated for agriculture, which has reduced and fragmented the native shrub-steppe habitats. As a result, the range of the Washington ground squirrel (Spermophilus washingtoni) has been significantly reduced, prompting the states of Washington and Oregon to review their status. Consequently, I investigated...
    Resource Type:
    Masters Thesis
    Full Text:
    redacted for privacy. Robert G. Anthony Much of the Columbia River Basin has been cultivated for

  • Demography and habitat selection of northern spotted owls in post-fire landscapes of southwestern Oregon

    Creator:
    Clark, Darren A.
    Abstract:
    Several large wildfires in southwestern Oregon during the summers of 2001 and 2002 provided the opportunity to investigate the impacts of wildfire on northern spotted owls (Strix occidentalis caurina). I used radio-telemetry and demographic surveys to describe demographic performance and habitat selection of spotted owls in the areas burned by...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: Robert G. Anthony Several large wildfires in southwestern Oregon during

  • Habitat use and densities of cavity-nesting birds in the Oregon Coast Range

    Creator:
    Nelson, S. Kim
    Abstract:
    I studied abundance patterns and habitat use of eight cavitynesting bird species in the Coast Ranges of Western Oregon during the spring and summer of 1985 and 1986. Three age classes of unmanaged Douglas-fir (Pseudotsuga menziesii) stands were selected for study: young (40-80 yrs), mature (80-200 yrs), and old-growth (>200...
    Resource Type:
    Masters Thesis
    Full Text:
    Densities of Cavity Nesting Birds in the Oregon Coast Ranges I I ')t -Abstract approved: Robert G. Anthony

  • Demography, home range, and habitat selection of northern spotted owls in the Ashland Watershed

    Creator:
    Schilling, Jason W.
    Abstract:
    Northern Spotted Owls (Strix occidentalis caurina) inhabit productive forests that historically supported frequent, large, variable-severity fires in the Klamath province of southwestern Oregon occur in complex. The potential for high-severity wildfire remains high throughout this region, so remaining spotted owl habitat is at risk. An adaptive management approach to fire...
    Resource Type:
    Masters Thesis
    Full Text:
    Robert G. Anthony Northern Spotted Owls (Strix occidentalis caurina) inhabit productive forests