Index Catalog // ScholarsArchive@OSU

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

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:: AN ABSTRACT OF THE DISSERTATION OF Darren A. Clark

Relationship Between Wildfire, Salvage Logging, and Occupancy of Nesting Territories by Northern Spotted Owls

Creator:: Clark, Darren A., Anthony, Robert G., and Andrews, Lawrence S.
Abstract:: The northern spotted owl (Strix occidentalis caurina) is one of the most intensively studied raptors in the world; however, little is known about the impacts of wildfire on the subspecies and how they use recently burned areas. Three large-scale wildfires in southwest Oregon provided an opportunity to investigate the short-term...
Resource Type:: Article
Full Text:: , and Occupancy of Nesting Territories by Northern Spotted Owls DARREN A. CLARK,1 Oregon Cooperative

Survival Rates of Northern Spotted Owls in Post-fire Landscapes of Southwest Oregon

Creator:: Clark, Darren A., Anthony, Robert G., and Andrews, Lawrence S.
Abstract:: We estimated annual survival rates (S) of 23 radio-marked Northern Spotted Owls (Strix occidentalis caurina) at the Quartz and Timbered Rock burns and adjacent areas in southwest Oregon. We used known-fate models in program MARK to test for differences in survival among three groups (owls dwelling inside of burned areas,...
Resource Type:: Article
Full Text:: Landscapes of Southwest Oregon Clark, D. A., Anthony, R. G., & Andrews, L. S. (2011). Survival rates of

Greater Sage-Grouse Demography, Habitat Selection, and Habitat Connectivity in Relation to Western Juniper and its Management

Creator:: Olsen, Andrew C.
Abstract:: The expansion of native, woody plants is a global phenomenon with characteristics and effects that are often indistinguishable from exotic invasions. These expansions have largely been driven by altered fire regimes and favorable climatic conditions. In the Great Basin of western North America, expansion of conifers such as western juniper...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Andrew Caleb

Effects of Synchronous Low Flow and Temperature Maxima on Coastal Cutthroat Trout and Coastal Giant Salamander: An Experimental Approach

Creator:: Tinoco Pickens, Francisco Andrew
Abstract:: As regional climates warm in the Pacific Northwest, USA, flow minima and temperature maxima may become more synchronous in headwater streams over time. The dual stresses from lower flows and warmer temperatures will be energetically costly for cold-water species such as Coastal Cutthroat Trout and Coastal Giant Salamander. Individual fates...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Francisco Andrew

Relative abundance and habitat associations of small mammals in two forest types in southern Oregon

Creator:: Johnston, Aaron N.
Abstract:: I studied small-mammal communities and their response to grazing in mixed-conifer forests and oak woodlands in the Cascade-Siskiyou National Monument in southern Oregon. My objectives were to (1) compare small-mammal communities among forest types and grazing intensities, (2) identify riparian affiliated species, and (3) describe microhabitat associations. Over two years,...
Resource Type:: Masters Thesis
Full Text:: communication of science. I also thank my committee members, Dr. John P. Hayes and Dr. Andrew Blaustein for

A Comparative Study of Foraging Behavior and Disturbance Regimes in Urban Versus Agricultural Habitats used by Cackling Geese Wintering in the Willamette Valley, Oregon

Creator:: Harrington, Erin R.
Abstract:: The Cackling goose (Branta hutchinsii minima) population has increased from a low of 20,000 in 1984 to the current population of 220,000-300,000 (Stehn 2012, Sanders 2013). As the Cackling goose population began to recover in the late 1990s, the majority of the population relocated from wintering in California to the...
Resource Type:: Masters Thesis
Full Text:: committee member Andrew Blaustein and my graduate council representative, Michael P. Nelson, for their

Effect of livestock grazing on native bees in a Pacific Northwest bunchgrass prairie

Creator:: Kimoto, Chiho
Abstract:: Native bees play an important role as pollinators of natural vegetation and agricultural crops. Yet many pollinators, including some native bees, are declining in numbers. Some of the potential causes of these declines are habitat destruction and degradation by various human land uses, including urban development and sprawl, construction of...
Resource Type:: Masters Thesis
Full Text:: like to thank Dr. Andrew R. Moldenke who spent many hours identifying thousands of bees to species

Native Bee and Spider Community Responses to Grassland Restoration and Wildfire

Creator:: Smith DiCarlo, Lauren A.
Abstract:: Up to 99.9% of native North American grasslands have been degraded since European settlement, primarily due to agricultural conversion. Today, grasslands are a top priority for restoration as they provide essential habitat for many rare and endangered species; however, the majority of studies in grasslands have focused on vegetation or...
Resource Type:: Dissertation

More than one million barriers fragment Europe’s rivers

Creator:: Belletti, Barbara, Garcia de Leaniz, Carlos, Jones, Joshua, Bizzi, Simone, Börger, Luca, Segura, Gilles, Castelletti, Andrea, van de Bund, Wouter, Aarestrup, Kim, Barry, James, Belka, Kamila, Berkhuysen, Arjan, Birnie-Gauvin, Kim, Bussettini, Martina, Carolli, Mauro, Consuegra, Sofia, Dopico, Eduardo, Feierfeil, Tim, Fernández, Sara, Fernandez Garrido, Pao, Garcia-Vazquez, Eva, Garrido, Sara, Giannico, Guillermo, Gough, Peter, Jepsen, Niels, Jones, Peter E., Kemp, Paul, Kerr, Jim, King, James, Łapińska, Małgorzata, Lázaro, Gloria, Lucas, Martyn C., Marcello, Lucio, Martin, Patrick, McGinnity, Phillip, O’Hanley, Jesse, Olivo del Amo, Rosa, Parasiewicz, Piotr, Pusch, Martin, Rincon, Gonzalo, Rodriguez, Cesar, Royte, Joshua, Schneider, Claus Till, Tummers, Jeroen S., Vallesi, Sergio, Vowles, Andrew, Verspoor, Eric, Wanningen, Herman, Wantzen, Karl M., Wildman, Laura, and Zalewski, Maciej
Abstract:: Rivers support some of Earth’s richest biodiversity and provide essential ecosystem services to society, but they are often fragmented by barriers to free flow. In Europe, attempts to quantify river connectivity have been hampered by the absence of a harmonized barrier database. Here we show that there are at least...
Resource Type:: Article

ScholarsArchive@OSU

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

Relationship Between Wildfire, Salvage Logging, and Occupancy of Nesting Territories by Northern Spotted Owls

Survival Rates of Northern Spotted Owls in Post-fire Landscapes of Southwest Oregon

Greater Sage-Grouse Demography, Habitat Selection, and Habitat Connectivity in Relation to Western Juniper and its Management

Effects of Synchronous Low Flow and Temperature Maxima on Coastal Cutthroat Trout and Coastal Giant Salamander: An Experimental Approach

Relative abundance and habitat associations of small mammals in two forest types in southern Oregon

A Comparative Study of Foraging Behavior and Disturbance Regimes in Urban Versus Agricultural Habitats used by Cackling Geese Wintering in the Willamette Valley, Oregon

Effect of livestock grazing on native bees in a Pacific Northwest bunchgrass prairie

Native Bee and Spider Community Responses to Grassland Restoration and Wildfire

More than one million barriers fragment Europe’s rivers

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