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Filtering by: Subject Beetles -- Northwest, Pacific Remove constraint Subject: Beetles -- Northwest, Pacific Advisor Harmon, Mark E. Remove constraint Advisor: Harmon, Mark E.

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  • Root decomposition in three coniferous forests : effects of substrate quality, temperature, and moisture

    Creator:
    Chen, Hua
    Abstract:
    Controls of substrate quality, temperature, and moisture on woody root decomposition in the Pacific Northwest were explored using chronosequences, time series, laboratory incubations, and simulation modeling approaches at three sites: Cascade Head (CAH), H. J. Andrews (HJA), and Pringle Falls Experimental Forests (PRF). In the chronosequence study, a structural component-oriented...
    Resource Type:
    Dissertation

  • Live-tree carbon in the Pacific Northwest : estimates and uncertainties

    Creator:
    Melson, Susanna L.
    Abstract:
    Concentration of carbon dioxide (CO₂) in the atmosphere has increased over the past 150 years. Because CO₂ is one of a number of radiatively active gases, there is concern that global temperatures will rise and climatic conditions will change. Recent research indicates northern hemisphere forests may currently be accumulating carbon...
    Resource Type:
    Masters Thesis

  • Carbon storage in a Pacific Northwest conifer forest ecosystem : a chronosequence approach

    Creator:
    Janisch, Jack E.
    Abstract:
    As concern over global warming intensifies, sequestration and storage of atmospheric CO2 has become an important scientific and policy issue. Confusion persists, however, over interpretation of forest carbon (C) source-sink dynamics, in part because conclusions drawn depend on temporal and spatial scales of analysis (e.g. day-week scale vs. successional-scale), type...
    Resource Type:
    Masters Thesis
    Full Text:
    Pacific Northwest Conifer Forest Ecosystem: A Chronoseguence Approach Signature redacted for privacy

  • Modeling nitrogen fixation in dead wood

    Creator:
    Hicks, William Thomas
    Abstract:
    A mechanistic simulation model of nitrogen fixation in dead wood was developed to help synthesize knowledge, develop hypotheses, and estimate rates of nitrogen fixation in the Pacific Northwest. In this model nitrogen fixation is directly controlled by log substrate, temperature, moisture, and oxygen content. Respiration and diffusion of oxygen indirectly...
    Resource Type:
    Dissertation