Index Catalog // ScholarsArchive@OSU

Man and the land : an ecological history of fire and grazing on eastern Oregon rangelands

Creator:: Shinn, Dean Allison
Abstract:: Ecological and historical information are combined in examining the environmental influence of fire and grazing on rangelands in eastern Oregon through time. Competitive relationships between herbaceous and woody flora in the northern Great Basin are discussed, focusing broadly on the shrubsteppe regions 'of Franklin and Dyrness (1973) but with special...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF DEAN ALLISON SHINN for the degree

Effect of western juniper on understory herbage production in Central Oregon

Creator:: Vaitkus, Milda R.
Abstract:: Evidence suggests that western juniper (Juniperus occidentalis) in Central Oregon affects understory production and composition. As trees increase in size and density, understory production is reduced and composition changes. This study was designed to identify the relationship between production and composition of understory vegetation and various tree canopy sizes of...
Resource Type:: Masters Thesis
Full Text:: Privacy 1 Dean of Gra ate Schoo4 Date Thesis is presented February 18, 1986 ACKNOWLEDGEMENTS I

Germination and seedling establishment of spiny hopsage (Grayia spinosa [Hook.] Moq.)

Creator:: Shaw, Nancy L. (Nancy Lynn), 1947-
Resource Type:: Dissertation
Full Text:: Department or crop ana Soil Sciences Redacted for Privacy Dean of f duate Sch Date thesis is presented

Associations Between Crested Wheatgrass and Native Vegetation in Southeastern Oregon : An Investigation of Co-establishment, Environment, Seeding History, and Livestock management

Creator:: Nafus, Aleta M.
Abstract:: Crested wheatgrass (Agropyron cristatum [L] Gaertm), an introduced bunchgrass, has been seeded on over 5 million hectares of degraded rangeland in western North America because it establishes more readily than native bunchgrasses. Because crested wheatgrass stands are associated with native species displacement and low biological diversity, there is substantial interest...
Resource Type:: Dissertation
Full Text:: Dean of the Graduate School I understand that my dissertation will become part of the

Re-establishment of native perennial bunchgrasses in juniper/medusahead rangelands

Creator:: Washington, Joseph P.
Resource Type:: Masters Thesis
Full Text:: , Department of angeland Resources Dean of Gra te School I understand that my thesis will become part of

Modeling sage-grouse habitat using a state-and-transition model

Creator:: Evers, Louisa
Abstract:: Habitat for wildlife species that depend on sagebrush ecosystems is of great management concern. Evaluating how management activities and climate change may affect the abundance of moderate and high-quality habitat necessitates the development of models that examine vegetation dynamics, but modeling tools for rangeland systems are limited. I developed state-and-transition...
Resource Type:: Dissertation
Full Text:: Environmental Science Graduate Program Dean of the Graduate School I understand that my dissertation

Geothermal exploration by telluric currents in the Klamath Falls area, Oregon

Creator:: Tang, Rex Wai-yuen
Abstract:: Geothermal resources are characterized by a very low electrical resistivity of the reservoir formations. The application of electrical methods in the reconnaissance type exploration for such resources is discussed. It is concluded that the magneto-telluric method is very well suited for this purpose. In 1971 and 1972 a reconnaissance type...
Resource Type:: Masters Thesis
Full Text:: Dean of chool of Ocenoraphy Dean of Graduate School Date thesis Is presented i21' Typed by Susie

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

Creator:: Purrington, Teal Mackenzie
Abstract:: Water potential, leaf conductance, growth, nitrogen content, and seedling survival of Wyoming Big Sagebrush (Artemisia tridentata ssp. wyomingensis) following defoliation of the herbaceous understory were assessed during two growing seasons. Precipitation was 107% and 63% of the long-term mean (283 mm) in 1989 and 1990, respectively, which presented an opportunity...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Dean of Gradu School (1 1 Date Thesis is Presented: January 29, 1992 Typed By

Estimates of combining abilities, heterotic effects and phenotypic correlations among in-bred lines of beef cattle and their line-crosses

Creator:: Humes, Paul Edwin
Abstract:: The investigations were based on a complete diallel cross among three inbred lines of Hereford cattle. Records of Angus calves born during the same period were used to obtain more accurate estimates of environmental effects and to determine breed differences among the various traits included in the study. Estimates of...
Resource Type:: Dissertation
Full Text:: for Privacy Dean of Graduate School Date thesis is presented August 10, 1968 Typed by Opal

The influence of environmental attributes on temporal and structural dynamics of western juniper woodland development and associated fuel loading characteristics

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:: Dean of the Rangeland Resources 3o I understand that my thesis will become part of the permanent

ScholarsArchive@OSU

Man and the land : an ecological history of fire and grazing on eastern Oregon rangelands

Effect of western juniper on understory herbage production in Central Oregon

Germination and seedling establishment of spiny hopsage (Grayia spinosa [Hook.] Moq.)

Associations Between Crested Wheatgrass and Native Vegetation in Southeastern Oregon : An Investigation of Co-establishment, Environment, Seeding History, and Livestock management

Re-establishment of native perennial bunchgrasses in juniper/medusahead rangelands

Modeling sage-grouse habitat using a state-and-transition model

Geothermal exploration by telluric currents in the Klamath Falls area, Oregon

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

Estimates of combining abilities, heterotic effects and phenotypic correlations among in-bred lines of beef cattle and their line-crosses

The influence of environmental attributes on temporal and structural dynamics of western juniper woodland development and associated fuel loading characteristics

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