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Filtering by: Subject Rhyolite -- Oregon, Eastern Remove constraint Subject: Rhyolite -- Oregon, Eastern Degree Field Wildlife Science Remove constraint Degree Field: Wildlife Science

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  • Twenty-year changes in riparian bird communities of east-central Oregon

    Creator:
    Ellis, Michael S.
    Abstract:
    Over the last 50 years, riparian zones in the semi-arid West have gained recognition as disproportionately important habitats for both breeding bird communities and agricultural operations. Despite growing interest in exploring avian-habitat relationships in these systems to better inform land management, few studies have attempted to describe temporal changes in...
    Resource Type:
    Masters Thesis
    Full Text:
    Fisheries & Wildlife Fund and the Eastern Oregon Agriculture & Natural Resource Program (EOANRP). We thank

  • Greater sage-grouse movements and habitat use during winter in central Oregon

    Creator:
    Bruce, Jennifer R.
    Abstract:
    Greater sage-grouse (Centrocercus urophasianus), a sagebrush obligate species, has contracted in extent by nearly half its original distribution. This is primarily due to habitat loss and degradation over the past 150 years. During winter, sage-grouse depend completely on sagebrush habitat for food and cover, yet sage-grouse winter ecology has been...
    Resource Type:
    Masters Thesis
    Full Text:
    Desert Ecological Province in eastern Oregon, along the western edge of the current geographic range of

  • Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

    Creator:
    Clark, Darren A.
    Abstract:
    Mule deer (Odocoileus hemionus hemionus) and Rocky Mountain elk (Cervus canadensis nelsoni; hereafter elk) populations in northeast Oregon have declined in the past 10 to 20 years. Concurrent with these declines, cougar (Puma concolor) populations have apparently increased, leading to speculation that predation by cougars may be responsible for declining...
    Resource Type:
    Dissertation
    Full Text:
    : Implications of Cougar Prey Selection and Demography on Population Dynamics of Elk in Northeast Oregon

  • Long-term Fuel Succession in the Sagebrush-steppe

    Creator:
    Reis, Schyler Ainsworth
    Abstract:
    Historically fire has been the primary disturbance factor in the sagebrush-steppe. The settlement of the West by Euro-Americans, grazing by domestic livestock, and the concomitant spread of invasive species have altered the historical fire regime. Understanding the long-term vegetation structure and fuel succession of the various sagebrush-dominated communities of this...
    Resource Type:
    Masters Thesis
    Full Text:
    Ainsworth Reis A THESIS submitted to Oregon State University

  • Resource Selection and Space Use of Western Long-eared Myotis (Myotis evotis) in a Western Juniper (Juniperus occidentalis) Woodland of Central Oregon

    Creator:
    Anthony, Christopher R.
    Abstract:
    Identifying habitat and spatial requirements of wildlife species across multiple spatial scales is a challenging, yet crucial component of wildlife management. Habitat use of bats is particularly difficult to study, and managing habitat to conserve bats is especially challenging because bats are highly vagile organisms that exploit several different types...
    Resource Type:
    Masters Thesis
    Full Text:
    Juniper (Juniperus occidentalis) Woodland of Central Oregon. Abstract approved

  • Survival Rates and Cause-Specific Mortality of Mule Deer in South-Central Oregon

    Creator:
    Mulligan, Elizabeth M.
    Abstract:
    It is critical for wildlife managers to understand the population dynamics of a harvested species, particularly for ungulates, which are a valuable wildlife resource. Due to concerns that mule deer (Odocoileus hemionus) populations in Oregon were declining, more comprehensive data on population vital rates and the factors potentially affecting them...
    Resource Type:
    Masters Thesis
    Full Text:
    implemented a seven year study to investigate habitat use and survival of mule deer in eastern Oregon. From