Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 70 for “"sagebrush"”.
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Sagebrush Steppe Habitats and Their Associated Bird Species in South Dakota, North Dakota, and Wyoming: Life on the Edge of the Sagebrush Ecosystem
Sagebrush lands in the western Dakotas are at the eastern edge of the distribution of sagebrush in the United States, forming a transition zone from the true shrubsteppe of Wyoming and Montana to the mixed-grass prairie that dominates most of the Dakotas. Because this transition zone is different …
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Conserving Montana's sagebrush highway: long distance migration in sage-grouse
… mechanism for conserving migratory wildlife in sagebrush ecosystems. We study further a greater sage-grouse (Centrocercus urophasianus; hereafter ‘sage-grouse’) population with the longest-known annual migration, a 240-km journey between summer range in north central Montana, USA, and …
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Conserving Montana's sagebrush highway: long distance migration in sage-grouse
… mechanism for conserving migratory wildlife in sagebrush ecosystems. We study further a greater sage-grouse (Centrocercus urophasianus; hereafter ‘sage-grouse’) population with the longest-known annual migration, a 240-km journey between summer range in north central Montana, USA, and …
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Digestion Studies With Sheep and Wild Antelope On A Sagebrush Ration
… and domestic species residing on a common range. Sagebrush is believed to be an important source of nutrients for antelope and, possibly, for sheep. It is know that antelope eat large quantities of it during the winter, and sheep also depend on it to some extent, particularly during severe …
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Effects of Cheatgrass Control on Wyoming Big Sagebrush in Southeastern Utah
… in southeastern Utah dominated by Wyoming big sagebrush (Artemisia tridentata var. wyomingensis [Beetle and A. Young] Welsh) have developed dense cheatgrass (Bromus tectorum L.) understories. These communities are currently characterized by predominately mature to decadent stands of sagebrush …
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Climatic influences on sagebrush establishment in Arid Rangelands: Applications for rangeland rehabilitation.
Sagebrush-dominated ecosystems are threatened by altered fire regimes, invasive species, infrastructure development, conversion to cropland, and encroachment by woody species. The economic and ecological significance of sagebrush makes it very important to develop successful strategies for …
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Interactions between Bromus tectorum, grasshoppers, and native plants in sagebrush steppe communities
… As a result of this and other disturbances, sagebrush shrubland is among North America's most imperiled ecosystems. Restoration of B. tectorum-infested areas has often been unsuccessful, and there is a need to understand the factors limiting revegetation success. There is evidence that B. …
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Soil-vegetation relationships of a bitter-brush-sagebrush association in northwestern Colorado
… responses in a bitterbrush (Purshia tridentata), sagebrush (Artemisia ~•) association on a single parent material. The effort was directed toward isolating those soil characteristics which are most valuable as indicators of potential vegetation production. Detailed soil and vegetation data were …
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Land Grabbers, Toadstool Worshippers, and the Sagebrush Rebellion in Utah, 1979-1981
… states. For two years what became known as the Sagebrush Rebellion swept across the American West like brushfire, engaging westerners of all stripes in a heated dispute over the question of the public lands. In Utah, as elsewhere in the West, public officials, rural ranchers, miners, developers, …
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Two Post-Glacial Sagebrush Steppe Fire Records at the Wildland-Urban Interface, Eastern Cascades, Washington
… past fire regimes in an understudied ecosystem, sagebrush steppe. In this thesis, two ca. 15,000-year-old fire histories were developed from study sites in Okanogan County, Washington. Lake sediment cores were analyzed using macroscopic charcoal analysis and CharAnalysis software. Relationships …
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Effects of pretreatment tree dominance and conifer removal treatments on plant succession in sagebrush communities
In sagebrush (Artemisia tridentata Nutt.) communities, the expansion and infilling of conifers decreases perennial vegetation cover and density, and lowers ecosystem resilience and resistance of the shrub-grass dominated state. Successional trajectories following disturbance are highly dependent …
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