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Filtering by: Alt title Regional CO₂ implications of forest bioenergy production Remove constraint Alt title: Regional CO₂ implications of forest bioenergy production Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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  • Permineralized Mesozoic Moss Gametophytes and their Implications for Bryophyte Evolution

    Creator:
    Bippus, Alexander C.
    Abstract:
    Mosses (Phylum Bryophyta) are widely considered to be among the most ancient groups of land plants (embryophytes) and they are the second most speciose embryophyte phylum with ~13,000 extant species. Despite their diversity and antiquity, mosses have a limited fossil record, which primarily consists of gametophytes entombed in Cenozoic amber....
    Resource Type:
    Dissertation
    Full Text:
    analyses of plant lineages that are well-represented in epiphytic and forest floor niches including

  • 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:
    a diversity of forest-dwelling organisms. Conventional thinning aims to optimize timber production

  • Establishment tolerance of six native sagebrush steppe species to imazapic (PLATEAU®) herbicide implications for restoration and recovery

    Creator:
    Bekedam, Steven
    Abstract:
    Scientists and land managers realize that integrated weed management (IWM) strategies are needed to attain successful and lasting improvements of weed infested landscapes. At this time no broadly reliable and environmentally safe IWM strategy has been developed to control exotic annual grasses that dominate many ecosystems of the northern Great...
    Resource Type:
    Masters Thesis
    Full Text:
    . Establishment Tolerance of Six Native Sagebrush Steppe Species to Imazapic (PLATEAU®) Herbicide: Implications

  • Hybridization between Castilleja levisecta and C. hispida : Implications for Pacific Northwest Prairie Management

    Creator:
    Sandlin, Isaac J., III
    Abstract:
    Conservation conflicts may develop on restoration sites with multiple species recovery objectives. For example, on Pacific Northwest prairies, the co-planting of the diploid cytotype of the common native wildflower Castilleja hispida with the endangered wildflower C. levisecta has resulted in putative Castilleja hybrids on restoration sites, prompting fears that genetic...
    Resource Type:
    Masters Thesis
    Full Text:
    species recovery objectives. For example, on Pacific Northwest prairies, the co-planting of the diploid

  • A potato growth and production model

    Creator:
    Apple, Jeanne Debons
    Abstract:
    A potato plant growth and production model is developed with the objectives of analyzing management alternatives and exploring the nature of the early dying syndrome. The geographic area of focus was the centerpivot irrigated circles of Oregon's Columbia Basin. A problem analysis of the potato production system of this area,...
    Resource Type:
    Dissertation
    Full Text:
    A Potato Growth and Production Model AN ABSTRACT OF THE

  • Characteristics of soil organic matter in two forest soils

    Creator:
    Crow, Susan E.
    Abstract:
    Soil organic matter (SOM) is the terrestrial biosphere's largest pool of organic carbon (C) and is an integral part of C cycling globally. Soil organic matter composition typically can be traced directly back to the type of detrital inputs; however, the stabilization of SOM results as a combination of chemical...
    Resource Type:
    Dissertation
    Full Text:
    or wood production Table 1-2. Comparison of H. J. Andrews Experimental Forest, OR (HJA) and Bousson

  • Foliar respiration in an old-growth coniferous forest

    Creator:
    Cooper, Clifton E.
    Abstract:
    Foliar respiration forms a large component of the carbon balance of any coniferous forest. We examine seasonal, interannual, spatial and interspecific variation of foliar maintenance respiration in a forest in Washington, USA, with measurements made quarterly for >4 years on 400-year old trees of Pseudotsuga menziesii, Tsuga heterophylla and Thuja...
    Resource Type:
    Dissertation
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    component of the carbon balance of any coniferous forest. We examine seasonal, interannual, spatial and

  • 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
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    Response to the Environment and Forest Structure in the Western Cascades of Oregon. Abstract Approved

  • 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
    Full Text:
    thank the H.J. Andrews Experimental Forest for use of their facilities during the field seasons. Doug

  • Epidemiology and population biology of Inonotus tomentosus as a pathogen of forests of British Columbia

    Creator:
    Lewis, Katherine JoAnn
    Abstract:
    The root disease fungus Inonotus tomentosus, common in the old growth boreal forests of British Columbia, poses a threat to the health of second growth forests established on sites with a previous history of root disease. Colonized stumps occur in groups of 1 to 6; the groups are clumped within...
    Resource Type:
    Dissertation
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    , and my admiration of his knowledge of forest pathology. There are many people who helped me out and