Index Catalog // ScholarsArchive@OSU

Creator:: Impara, Peter C.
Abstract:: Fire history and fire regime were interpreted from tree ring analysis of 4320 stumps at 178 sites in a 25 by 55 km area in the central Oregon Coast Range. A total of 27 fire episodes were identified in a 516 year period, with sizes estimated at 18 to 544...
Resource Type:: Dissertation
Full Text:: pre-existing stands: only 347 trees examined (8%) were >400 years old, and none exceeded 516 years

Creator:: Ballard, Teena M.
Abstract:: Spring chinook salmon spawning occurs in late summer when it is common for cattle to be present in pastures that have streams where fish spawning occurs. This two-year study addressed three main objectives relative to behavioral interactions between cattle and spring chinook salmon during the spawning life history stage. These...
Resource Type:: Masters Thesis

Creator:: Freid, Matthew A.
Abstract:: The pattern of ownership imposed on the-forest landscape of Western Oregon defines the boundaries in which differences in jurisdiction, regulation, and land use operate. Road building is controlled by these factors, and in turn has an effect on the cumulative effects of human utilization of the forest. This study examined...
Resource Type:: Capstone Project

Creator:: Bates, Jonathan D.
Abstract:: Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...
Resource Type:: Dissertation

Creator:: Rathert, Daniel E.
Abstract:: Native freshwater fish biodiversily is imperiled in Oregon with 36 species or sub-species listed by the State of Oregon as sensitive, threatened, or endangered, and 9 species or sub-species listed as endangered or threatened under the federal Endangered Species Act. Understanding and managing biodiversity is critical to its conservation. Using...
Resource Type:: Capstone Project

Creator:: May, Christine L.
Abstract:: Debris flows in the Pacific Northwest play a major role in routing wood and sediment stored on hillslopes and in first- through third-order channels to higher order channels and valley floors. Forest practices on steep, unstable slopes and removal of riparian trees along low-order streams can affect the frequency, magnitude,...
Resource Type:: Masters Thesis
Full Text:: the PNW station in Corvallis provided GIS data and other technological and personal assistance, with

Creator:: Pendergrass, Kathy L. (Connelly)
Abstract:: Fires set by Native Americans were important in shaping and maintaining Willamette Valley prairie plant communities. With fire exclusion after Euro-American settlement in the 1840's, composition of the remaining prairies shifted toward shrub and tree dominance with a concomitant decline in endemic prairie plant populations. I hypothesize that by restoring...
Resource Type:: Masters Thesis
Full Text:: ; Geoflora in PNW; Loss of species dependent on Late Pliocene-increasing ppt. and decreasing summer

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