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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 Field Rangeland Ecology and Management Remove constraint Degree Field: Rangeland Ecology and Management

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  • Seed bank response to juniper expansion in the semi-arid lands of Oregon, USA

    Creator:
    Duncan, Corinne M.
    Abstract:
    Expansion of Juniperus occidentalis into the sagebrush steppe has resulted in significant changes in understory composition. A consequence of increased J. occidentalis dominance may be a depletion of the seed bank. The potential for depletion is problematic because a reduction in the amount of species available from the seed bank...
    Resource Type:
    Masters Thesis
    Full Text:
    resulted in significant changes in understory composition. A consequence of increased J. occidentalis

  • Vegetation and soil response to tree removal methods in invasive western juniper woodlands

    Creator:
    O'Connor, Casey A.
    Abstract:
    On piñon-juniper encroached sites that lack the understory fuels to carry a prescribed fire, treatment options are limited to mechanical methods. Cutting with chainsaws and leaving the trees on site has been the primary treatment method for such sites, however this method creates a potential fire hazard, particularly in the...
    Resource Type:
    Masters Thesis
    Full Text:
    between species (Bates et al. 1998). Cover and density of Sandberg bluegrass (Poa secunda J. Presl) and

  • 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

  • Linking greater sage-grouse habitat use and suitability across spatiotemporal scales in central Oregon

    Creator:
    Freese, Mark T.
    Abstract:
    Greater Sage-grouse (Centrocercus urophasianus) habitat research has historically focused on fine-scale (0.007 - 0.032 ha) vegetation structure and composition immediately surrounding sites selected by birds. However, little work has evaluated vegetation attributes important for Greater Sage-grouse at a landscape-scale or identified landscape attributes that influence habitat use patterns. Habitat use...
    Resource Type:
    Masters Thesis
    Full Text:
    . Mike Borman, Dr. Douglas Robinson, Dr. Michael Gregg, Dr. Christen Hagan, Dr. Michael J. Gamroth, Dr