Index Catalog // ScholarsArchive@OSU

Ecological relationships among feral horses, cattle, and pronghorn in southeastern Oregon

Creator:: McInnis, Michael Lindsay
Resource Type:: Dissertation

A comparison of four methods used in determining the diets of large herbivores

Creator:: McInnis, Michael Lindsay
Abstract:: Esophageal fistulation, stomach content analysis, fecal analysis, and ocular-estimate-by-plot are four of the most publicized methods of determining the diets of large herbivores. The principal objective of this study was to compare the relative values of each of these methods based upon information collected from bi-fistulated (esophageal and rumen) sheep...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Michael Lindsay McInnis for the

Influence of ruminant digestive processes on germination of ingested seeds

Creator:: Lowry, Amaya A.
Abstract:: Managing cattle to disseminate seeds of desirable plants, or alternatively, to restrict weed seed contamination on rangelands is of interest to managers. Four experiments were conducted to determine effects of ruminant digestion on germination of ingested seeds. A number of plant species representing a variety of seed size and seed...
Resource Type:: Masters Thesis
Full Text:: Germination of Ingested Seeds. Abstract approved: Michael L. McInnis Managing cattle to disseminate seeds

The effects of defoliation on yellow starthistle (Centaurea solstitialis L.) reproductive capacity

Creator:: Schumacher, Stacy
Abstract:: Yellow starthistle (Centaurea solstitialis L.) is an introduced Asteraceae that has become established on 10 million acres in the Pacific Northwest and California. This weed functions as an annual or short-lived perennial and depends on seeds for reproduction. Strategies of control that reduce plant fitness or lower seed production or...
Resource Type:: Masters Thesis
Full Text:: where annual precipitation varies between 25 to 100 cm, and elevation ranges from sea level to 2500 m

The economic feasibility of off-stream water and salt to reduce grazing pressure in riparian areas

Creator:: Stillings, Amy M.
Abstract:: Properly functioning riparian systems are vital to the health of watersheds and provide an important forage and habitat resource for livestock and wildlife. Riparian grazing management strategies that are economically feasible and achieve environmental goals are needed by resource managers and livestock producers. The objective of this thesis was to...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Amy M. Stillings for the degree of

Yellow starthistle : ecology and management on Pacific Northwest rangelands

Creator:: Oregon State University. Extension Service, Larson, Larry, Sheley, R., McInnis, M., and Kiemnec, Gary L.
Abstract:: Yellow starthistle (Centaurea solstitialis L.) is a member of the knapweed (Centaurea L.) complex. It is poor forage for all livestock and causes “chewing disease,” a nervous disorder, in horses. Yellow starthistle infests millions of acres in California and the Pacific Northwest. Infestations range from scattered plants to dense stands...
Resource Type:: Technical Report
Full Text:: Ecology and Management on Pacific Northwest Rangelands Yellow Starthistle L. Larson, R. Sheley, M. McInnis

Nutritional ecology of cervids in old-growth forests in Olympic National Park, Washington

Creator:: Leslie, David M.
Abstract:: Nutritional ecology of unhunted and sympatric populations of Roosevelt elk, Cervus elaphus roosevelti, and Columbian black-tailed deer, Odocoileus hemionus columbianus, was investigated in old-growth forests of the Hoh Valley in Olympic National Park, Washington, from September 1979 to November 1981. Seasonal diets of both cervids generally were comprised of common...
Resource Type:: Dissertation
Full Text:: characteristically broad and U-shaped; elevations vary from 150 m on the valley floor to 910 m on surrounding ridges

Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

Creator:: Riegel, Gregg M.
Abstract:: The objective of this research was to determine which environmental resources, light, water, and nutrients, control understory plant production and composition in a Pinus ponderosa forest in northeastern Oregon. A split-plot experimental design, with three blocks, four treatments, and 44 plots, was established in the summer of 1985. Twenty plots...
Resource Type:: Dissertation
Full Text:: forests of northeastern Oregon AN ABSTRACT OF THE THESIS OF Gregg M. Riegel for the degree of Doctor of

RoeverCEOARCCattleGrazingSemiarid.pdf

Creator:: Roever, C. L., DelCurto, T., Rowland, M., Vavra, M., and Wisdom, M.
Abstract:: Climate change models are predicting increased frequency and severity of droughts in arid and semiarid environments, and these areas are responsible for much of the world's livestock production. Because cattle (Bos taurus) grazing can impact the abundance, distribution, and ecological function of native plant and animal communities, it is important...
Full Text:: drought Roever, C. L., DelCurto, T., Rowland, M., Vavra, M., & Wisdom, M. (2015). Cattle grazing in

Prescribed fire effects on resource selection by cattle in mesic sagebrush steppe. Part 2: Mid-summer grazing

Creator:: Clark, Patrick E., Lee, Jaechou, Ko, Kyungduk, Nielson, Ryan M., Johnson, Douglas E., Ganskopp, David C., Pierson, Fredrick B., and Hardegree, Stuart P.
Abstract:: Prescribed fire can release herbaceous forages from woody plant competition thus promoting increased forage plant production, vigor, and accessibility. Prescribe fire also consumes standing litter thereby improving forage quality and palatability. Consequently, prescribed fire is commonly considered an effective tool for manipulating livestock distribution on rangelands. Efficacy of this tool...
Resource Type:: Article
Full Text:: ., Nielson, R. M., Johnson, D. E., Ganskopp, D. C., ... & Hardegree, S. P. (2016). Prescribed fire effects

ScholarsArchive@OSU

Ecological relationships among feral horses, cattle, and pronghorn in southeastern Oregon

A comparison of four methods used in determining the diets of large herbivores

Influence of ruminant digestive processes on germination of ingested seeds

The effects of defoliation on yellow starthistle (Centaurea solstitialis L.) reproductive capacity

The economic feasibility of off-stream water and salt to reduce grazing pressure in riparian areas

Yellow starthistle : ecology and management on Pacific Northwest rangelands

Nutritional ecology of cervids in old-growth forests in Olympic National Park, Washington

Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

RoeverCEOARCCattleGrazingSemiarid.pdf

Prescribed fire effects on resource selection by cattle in mesic sagebrush steppe. Part 2: Mid-summer grazing

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