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  • 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...
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    Dissertation
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    western Oregon, lichen community monitoring plots were established prior to treatment and resampled

  • 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...
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    Dissertation
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    distributions of individual lichen species in the western Cascades of Oregon, using a large landscape scale

  • Analysis and prediction of patterns in lichen communities over the western Oregon landscape

    Creator:
    Peterson, Eric B.
    Abstract:
    The diverse lichen flora of the Pacific Northwest is being impacted by population growth and by forest management practices. Accumulating information about our lichen flora will improve our conservation strategies. This dissertation first collects information to improve our understanding of how lichen communities vary among forests of differing structure, and...
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    Dissertation
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    Prediction of Patterns in Lichen Communities over the Western Oregon Landscape. Abstract Approved: Bruce P

  • Ecological relation of sympatric steelhead and resident rainbow trout in the Deschutes River, Oregon

    Creator:
    Zimmerman, Christian E.
    Abstract:
    Sympatric steelhead and resident rainbow trout (Oncorhynchus mykiss) are known to exist in many rivers throughout the Pacific Rim. Whether sympatric steelhead and resident rainbow trout are polymorphisms within a single gene pool or two reproductively isolated populations has significant implications concerning the study and conservation of this polytypic species....
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    Dissertation
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    , Oregon. Gordon H. Reeves Sympatric steelhead and resident rainbow trout (Oncorhynchus mykiss) are known

  • Geochemical cycling in a Pacific Northwest estuary (Tillamook Bay, Oregon, USA)

    Creator:
    Colbert, Debbie L.
    Abstract:
    This thesis investigates the behavior of major inorganic nutrients (P, N, Si), trace metals (Mn, Fe), and alkaline-earth metals (Ba) within Tillamook Bay over seasonal cycles and under a range of river discharge conditions from October 1997 through December 1999. Located in the Pacific Northwest region, Tillamook Bay is an...
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    Dissertation
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    Cycling in a Pacific Northwest Estuary (Tillamook Bay, Oregon, USA). Abstract approved: James McManus

  • Epiphytic macrolichens in relation to forest management and topography in a western Oregon watershed

    Creator:
    Berryman, Shanti D.
    Abstract:
    This dissertation describes patterns in epiphytic macrolichen community composition, diversity, and biomass across various stand types in the Blue River watershed of western Oregon. It first examines the relative importance of ecological factors such as stand age, remnant tree retention, and topography to lichen communities in the landscape. It then...
    Resource Type:
    Dissertation
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    and Lichen Community Data in the Central Cascade Forests of Western Oregon, USA