Index Catalog // ScholarsArchive@OSU

Creator:: Johnson, Dustin D.
Abstract:: Since European American settlement of the Intermountain Region, dramatic changes in vegetation composition and structure have occurred in the sagebrush steppe ecosystem. Western juniper (Juniperus occidentalis spp. occidentalis Vasek), although indigenous to the Intermountain Region, has increased since the late 1800s. Considerable work has been done documenting juniper woodland expansion...
Resource Type:: Masters Thesis
Full Text:: maj or advisor, Dr. Richard F. Miller, and committee members, Dr. Douglas Johnson and Dr. William

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:: surveys and radio-telemetry. In addition, I thank Drs. Eric Forsman and Bill Ripple for serving on my

Creator:: Clark, Darren A.
Abstract:: Mule deer (Odocoileus hemionus hemionus) and Rocky Mountain elk (Cervus canadensis nelsoni; hereafter elk) populations in northeast Oregon have declined in the past 10 to 20 years. Concurrent with these declines, cougar (Puma concolor) populations have apparently increased, leading to speculation that predation by cougars may be responsible for declining...
Resource Type:: Dissertation
Full Text:: University. I thank Drs. Andrew R. Blaustein, Daniel D. Roby, and William J. Ripple for their guidance

Creator:: Wiens, J. David
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:: Dissertation
Full Text:: scientists. I also thank David Hibbs, Barry Noon, and Bill Ripple for serving on my doctorate committee

Creator:: Young, Brian K.
Abstract:: In this paper "map complexity" refers to the inherent intricacy of a mapped geographic pattern. Map complexity and sample size are two variables shown to influence the accuracy of interpolated dasymetric maps. An automated experiment was designed to investigate the precise relationship among map complexity, sample size, and the accuracy...
Resource Type:: Masters Thesis
Full Text:: professor and mentor; committee members Dr. Phillip L. Jackson and Dr. Charles L. Rosenfeld; Dr. William J

Creator:: Wang, Sen
Abstract:: The vegetation of a 420 square mile area of the Oregon Coastal Mountain Range was mapped using data from the multispectral scanner system aboard Landsat. Advantages of this mapping system include rapid synoptic coverage of the same geographic area at different periods in time at a reduced cost compared to...
Resource Type:: Masters Thesis

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