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Filtering by: Creator Colorado. Dept. of Agriculture Remove constraint Creator: Colorado. Dept. of Agriculture Degree Field Wildlife Science Remove constraint Degree Field: Wildlife Science License All rights reserved Remove constraint License: All rights reserved

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  • The Influence of Wildfire and Invasive Vegetation on Mule Deer

    Creator:
    Schuyler, Elizabeth
    Abstract:
    The western United States has experienced large-scale degradation due to land use and land cover changes, invasion of annual grasses, and expansion of woody plants into grass and shrublands and the resultant altered fire regimes. These landscape-scale changes have coincided with declining mule deer (Odocoileus hemionus) populations, making habitat loss...
    Resource Type:
    Dissertation
    Full Text:
    Ponderosa pine forests of the Colorado Front Range, USA. Forests 8:159. Sanders, S. D., and M. A. Flett

  • Evaluating space use and pesticide exposure risk for burrowing owls in an agricultural environment

    Creator:
    Gervais, Jennifer A.
    Abstract:
    Large burrowing owl (Aihene cunicularia) populations exist in areas of intensive agriculture in California, and pesticide exposure has been identified as a potential threat to population persistence. I evaluated breeding season use of agricultural fields by adult male owls using radio telemetry, and examined egg contaminant residues to estimate population-level...
    Resource Type:
    Dissertation
    Full Text:
    . 1997), but these populations are often in areas of intensive industrial agriculture. Agricultural

  • Effects of oil and natural gas development on territory occupancy of ferruginous hawks and golden eagles in Wyoming, USA

    Creator:
    Wallace, Zachary P.
    Abstract:
    Energy development is expanding rapidly across the western US. Negative effects have been documented for some wildlife, but consequences of development are unclear for other taxa, including raptors. We had the opportunity to examine effects of oil and natural gas development on two raptor species of conservation concern, ferruginous hawks...
    Resource Type:
    Masters Thesis
    Full Text:
    season, as ferruginous hawks winter in suburban areas of Colorado (Plumpton and Andersen 1998). Human

  • 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:
    administered by USDA Forest Service, and lands administered by the Bureau of Land Management (US Dept. of

  • Small mammal responses to silvicultural fuels treatments in southwest Oregon

    Creator:
    Manning, Jeffrey A.
    Abstract:
    Despite the belief that fuels management, a form of prescribed fire that reduces accumulated fuels in commercially thinned forests, is necessary to restore forest 'health' in the Pacific Northwest, its effects on wildlife has received little attention in the scientific literature. Because fuels management is supported, funded, and implemented nationwide...
    Resource Type:
    Masters Thesis
    Full Text:
    Policy (FWFMP) (U.S. Department of Interior [USD1] and U.S. Department of Agriculture [USDA] 2001

  • 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:
    . Department of Agriculture. 39 p. Britton, C. M.; Clark, R. G. 1985. Effects of fire on sage- brush and

  • Floodplain vegetation following over 80 years of intensive land use and de-watering : Lower Owens River, California

    Creator:
    Risso, Derek A.
    Abstract:
    Riparian areas in the arid western United States are critical ecosystems that have been severely degraded by a variety of land and water uses over the last 100 years. In this study, the composition and structure of floodplain vegetation along the Lower Owens River in eastern California was quantitatively described...
    Resource Type:
    Masters Thesis
    Full Text:
    in riparian meadows. A study in Colorado found that exclusion of grazing for 30 years doubled

  • Vegetation and Small Mammal Responses to Western Juniper (Juniperus occidentalis) Control in Eastern Oregon

    Creator:
    Morozumi, Corinne N.
    Abstract:
    Shrub-steppe ecosystems of western North America provide habitat for many wildlife species, are important components of public and private rangelands, and offer recreational opportunities for millions of people. They are some of the most vulnerable ecosystems in the United States and have been altered by human activities such as livestock...
    Resource Type:
    Masters Thesis
    Full Text:
    to agriculture, and urbanization of the west. Since the late 1800s woody encroachment of piñon

  • Assessment of mule deer fawn survival and birth site habitat attributes in south-central Oregon

    Creator:
    Speten, David
    Abstract:
    Mule deer (Odocoileus hemionus) populations in south-central Oregon are near their lowest levels since census efforts began in 1961. I investigated fawn survival, cause-specific mortality, and factors contributing to mortality from 2010 – 2012 to identify potential causes for the decline. I also explored pre-parturition and parturition site characteristics. I...
    Resource Type:
    Masters Thesis
    Full Text:
    . C. White, and R. M. Bartmann. 1999. Mule deer survival in Colorado, Idaho, and Montana. Journal of

  • White-breasted nuthatch density and nesting ecology in oak woodlands of the Willamette Valley, Oregon

    Creator:
    Viste-Sparkman, Karen
    Abstract:
    Habitat loss causes a reduction in available resources for wildlife, alters the configuration of remaining habitat, and may isolate wildlife populations. White-breasted nuthatches (Sitta carolinensis) are experiencing long-term population declines in the Willamette Valley of Oregon, where they are historically associated with oak woodlands. As secondary cavity-nesters, white-breasted nuthatches may...
    Resource Type:
    Masters Thesis
    Full Text:
    cleared for agriculture by the arriving settlers, fire suppression promoted the succession of oak