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Filtering by: Creator Svejcar, Tony J. Remove constraint Creator: Svejcar, Tony J. Advisor Miller, Richard F. Remove constraint Advisor: Miller, Richard F. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Understory vegetation response and nitrogen cycling following cutting of western juniper

    Creator:
    Bates, Jonathan D.
    Abstract:
    Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...
    Resource Type:
    Dissertation
    Full Text:
    approved : Tony Svejcar Since the late 1880's western juniper has expanded in range and increased in

  • Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

    Creator:
    Davies, Kirk W.
    Abstract:
    This study consisted of two research projects in the Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis (Beetle & A. Young) S.L. Welsh) alliance, the most extensive of the big sagebrush complex in the Intermountain West. In the first project, we intensively sampled 107 relatively undisturbed, late seral Wyoming big sagebrush...
    Resource Type:
    Dissertation
    Full Text:
    Svejcar, and Felix Bell who all assisted with at least two field seasons of data collection. The

  • 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

  • Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

    Creator:
    Riegel, Gregg M.
    Abstract:
    The objective of this research was to determine which environmental resources, light, water, and nutrients, control understory plant production and composition in a Pinus ponderosa forest in northeastern Oregon. A split-plot experimental design, with three blocks, four treatments, and 44 plots, was established in the summer of 1985. Twenty plots...
    Resource Type:
    Dissertation
    Full Text:
    physiologically adapted to cope with limited soil moisture than Calamagrostis (Svejcar 1983, 1986). This greater