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Filtering by: Alternative title ssim Forest statistics for County, Oregon Remove constraint Alternative title ssim: Forest statistics for County, Oregon Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Conservation biology of Plagiobothrys hirtus (Boraginaceae) : evaluation of life history and population enhancement

    Creator:
    Amsberry, Kelly
    Abstract:
    Plagiobothrys hirtus (Boraginaceae) is a state and federally listed endangered plant found only in Douglas County, Oregon. This vernal pool endemic has historically been threatened by agricultural conversion of seasonal wetlands in the Sutherlin area, and is currently being eradicated as habitat is lost due to the rapid urban development...
    Resource Type:
    Masters Thesis
    Full Text:
    enhancement study sites in 19 Douglas County, Oregon. 3. Plants in the greenhouse ready for transplanting. 23

  • Reproduction, demography, and habitat characterization of Astragalus peckii (Fabaceae), a rare central Oregon endemic

    Creator:
    Martin, Elizabeth F.
    Abstract:
    With little previous research on Astragalus peckii (Fabaceae), a state-listed Threatened species in Oregon, I investigated three facets of its biology which are integral to the conservation and management of the species. First, a four-year demographic study of two large populations revealed increasing population growth at one site (Chiloquin) and...
    Resource Type:
    Dissertation
    Full Text:
    submitted to Oregon State University in partial fulfillment of the requirements for

  • Cryptogam communities in forest and steppe ecosystems of Oregon, USA

    Creator:
    Root, Heather T.
    Abstract:
    I focus on addressing knowledge gaps relating to management of cryptogams in Oregon's public lands in Pseudotsuga menziesii-Tsuga heterophylla forests on the west side of the Cascade Range and dryland steppe in the Cascade Range's rainshadow. While a great deal of research has illustrated the importance of late-successional forests for...
    Resource Type:
    Dissertation
    Full Text:
    presented on June 9, 2011. Title: Cryptogam Communities in Forest and Steppe Ecosystems of Oregon, USA

  • The epidemiology of sudden oak death in Oregon forests

    Creator:
    Peterson, Ebba K.
    Abstract:
    The phytopathogen Phytophthora ramorum (Werres, DeCock & Man in't Veld), causal agent of Sudden Oak Death (SOD) of oaks (Quercus spp.) and tanoaks (Notholithocarpus densiflorus syn. Lithocarpus densiflorus), is established in coastal forests of the western United States. Since the discovery of SOD in the Douglas-fir / tanoak forests of...
    Resource Type:
    Dissertation
    Full Text:
    Oregon State University in partial fulfillment of the requirements for the degree of

  • Soil fungal hyphal dynamics and seasonal hypogeous sporocarp production in western Oregon Douglas-fir forests

    Creator:
    Hunt, Gary, 1945-
    Abstract:
    Total length and biomass of fungal mycelium in the soil of a young Douglas-fir stand in the central Oregon Coast Range were estimated over 27 months with the agar-film technique. In a second study, phenology and taxonomy of hypogeous (belowground) sporocarps were studied over 32 months in a nearby, young...
    Resource Type:
    Dissertation
    Full Text:
    Forest Service, Pacific Northwest Forest and Range Experiment Station, Corvallis, Oregon. Pergamon Press

  • Relationships of exotic species and wildfire to the threatened plant Silene spaldingii

    Creator:
    Menke, Carolyn A.
    Abstract:
    In the canyon grasslands of Garden Creek Ranch Preserve in Idaho, where the threatened plant Silene spaldingii occurs and invasion by the exotic species Centaurea solstitialis and Bromus tectorum is proceeding rapidly, I examined environmental and community patterns of site invasion, and evaluated the apparent influence of invasion on Silene...
    Resource Type:
    Masters Thesis
    Full Text:
    , Reconnaissance Soil Survey for Nez Perce County, ID, 1976). Soils are typically shallow and rocky along ridges

  • Development and Application of Tools for Genetic Analysis of Clonal Populations

    Creator:
    Kamvar, Zhian N.
    Abstract:
    Research on the population genetics of microbial organisms requires the use of specialized analyses designed for clonal organisms to avoid violating the assumptions of traditional population genetic models. The tools necessary for performing these analyses existed as a set of unrelated software with non-overlapping capabilities and did not cover all...
    Resource Type:
    Dissertation
    Full Text:
    pathogen, Phytophthora ramorum in Curry County, Oregon. In chapter 5, we use poppr to assess the power

  • An analysis of montane forest vegetation on the east flank of the central Oregon Cascades

    Creator:
    West, Neil E.
    Abstract:
    Montane forest vegetation as it occurs on the east flank of the central Oregon Cascades has provided excellent conditions for a "natural experiment" in the use of various methodologies in studying vegetational distribution. This "experiment" has reflected on some theory and practice for the discipline of plant synecology. Detailed descriptions,...
    Resource Type:
    Dissertation
    Full Text:
    of the central Oregon Cascades AN ABSTRACT OF THE THESIS OF Neil Elliott West for the (Name

  • Lichen response to the environment and forest structure in the western Cascades of Oregon

    Creator:
    Martin, Erin P.
    Abstract:
    Lichens are an important part of the biota in western Oregon forests, where they perform valuable ecological roles and contribute significantly to biodiversity. Lichens in western Oregon are threatened by a number of factors including air pollution and land use practices. If we wish to maintain the persistence of lichens...
    Resource Type:
    Dissertation
    Full Text:
    western Oregon Cascades. These gradients form a context for understanding likely effects of forest

  • Shrub epiphyte communities in relation to stand management in forests of western Oregon

    Creator:
    Rosso, Abbey L.
    Abstract:
    This dissertation describes the epiphyte communities on tall shrubs in forests of western Oregon, with a focus on potential effects of management practices on these communities. Shrubs and other hardwoods have recently gained recognition as hotspots of diversity for epiphytes in young conifer forests of the region. Yet little is...
    Resource Type:
    Dissertation
    Full Text:
    forests of western Oregon AN ABSTRACT OF THE THESIS OF Abbey L. Rosso for the degree of Doctor of