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.
Results
Showing 1 to 15 of 15 for “"sagebrush steppe"”.
-
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. …
-
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 …
-
Responses of Above- and Belowground Forb and Plant Species Diversity to Grazing Exclusion and Fire in the Northern Great Basin Sagebrush Steppe
… increase in annual invasive grasses, and greater sagebrush dominance. Although not as widely used as perennial bunchgrasses, forbs of the Intermountain west have also been tested for use in rehabilitation purposes in the Intermountain West. Forbs provide the majority of plant species richness in …
-
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 …
-
Habitat Resource Selection By Greater Sage Grouse Within Oil and Gas Development Areas in North Dakota and Montana
… land-use changes that have reduced and degraded sagebrush ecosystems (Hemstrom et al. 2002). Sage grouse are native to the sagebrush steppe ecosystem, and their distribution closely follows that of sagebrush. Important mineral resources (i.e., gas, oil) are coincident with sage grouse habitats …
-
The Greater Sage-grouse in Wyoming: A Technonatural Study
… industrial action across its range. Wyoming's Sagebrush Steppe contains 37.5% of the remaining range wide population. The grouse was listed as a candidate species under the 1973 U.S. Endangered Species Act triggering responses from Federal, State, and international wildlife management agencies, …
-
Post-Wildfire Vegetation Response on Diverse Rangelands in Northeast California: Does Livestock Grazing Management Matter?
Wildfires are increasing in size and frequency and are affecting federal lands used for livestock grazing across the western United States. A recommended approach to post-wildfire grazing policy is to rest fire-affected areas from grazing for two growing seasons following a burn; however, this …
-
Vegetation response of a Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) community to 6 mechanical treatments in Rich County, Utah
In recent years, the importance of sagebrush to shrub-steppe ecosystems and associated plant and animal species has been recognized. The historical removal of herbaceous species by excessive and uncontrolled livestock grazing on many of our sagebrush ecosystems has resulted in a stagnant state …
-
Ecology of Greater Sage-Grouse in the Dakotas
… (Centrocercus urophasianus) populations and the sagebrush (Artemisia spp.) communities that they rely on have dramatically declined from historic levels. Moreover, information regarding sage-grouse annual life-history requirements at the eastern-most extension of sagebrush steppe communities is …
-
Evaluation of Aerial Transect Surveys, Survival, and Movements of Pronghorns in Western South Dakota
… of pronghorns within an eastern extension of sagebrush steppe communities by describing relationships between favorable climatic conditions, seasonal home ranges, and pronghorn movements. During years with milder winters, we recommend the continued use of spring aerial surveys to obtain data …