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  • 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:
    ) for primary inputs to the forest floor and mineral soil at eachstudy site

  • The imprint of coarse woody debris on soil biological and chemical properties in the western Oregon Cascades

    Creator:
    Spears, Julie D. H.
    Abstract:
    The abundance and spatial heterogeneity of coarse woody debris (CWD) on the forest floor is a prominent feature of Pacific Northwest (PNW) forest ecosystems. The effect of CWD on soil solution chemistry, nutrient cycling and availability, soil physical structure and formation of soil organic matter, however, remains unknown. Therefore, studies...
    Resource Type:
    Dissertation
    Full Text:
    pools in an old growth forest, Oregon, U.S.A. Can J. For. Res. 22: 1536-1546. Perry, D. A. 1998. The

  • Riparian lichens of northern Idaho

    Creator:
    Hutchinson, Jenifer L.
    Abstract:
    Riparian forests in the Idaho Panhandle, north of Whitebird, were surveyed for rare riparian lichen species. The region was stratified into nine geographic units and by stream size. Eighty-one plots were surveyed for lichen community, stand and river characteristics. Variables important to lichen community composition included regional differences, elevation, climatic...
    Resource Type:
    Masters Thesis
    Full Text:
    Rosentreter 2000). Other lichen floristic works exist for the Priest River Experimental Forest (McCune and

  • Bioindication of air quality in forests of northern and central California using epiphytic macrolichen communities

    Creator:
    Jovan, Sarah
    Abstract:
    The unifying purpose of this dissertation was to describe, model, and map relationships between epiphvtic macrolichen communities and air quality in Ibrests of northern and central California. First, multivariate analyses were used to subdivide the large study area into three model areas with similar climate, topography, and lichen communities: the...
    Resource Type:
    Dissertation
    Full Text:
    . Most funding for this research was kindly provided by the Forest Service PNW Research Station and the

  • Impacts of ponderosa pine forest restoration treatments on the ectomycorrhizal fungal community and fine root biomass in the Blue Mountains of Oregon

    Creator:
    Smith, Jane E. (Jane Elizabeth)
    Abstract:
    Before the arrival of Euro-Americans, the inland Pacific Northwest was settled by native people whose frequent intentional burning of the landscape promoted open stands dominated by large fire-resistant ponderosa pine. Fire suppression for nearly a century, livestock grazing, and logging of the largest trees has resulted in forests characterized by...
    Resource Type:
    Dissertation
    Full Text:
    structural changes to the forest ecosystem are particularly evident in the Blue Mountains of Oregon and

  • Effects of single and multiple stressors on communities of wheat and wild oats

    Creator:
    Pfleeger, Thomas G.
    Abstract:
    Most plant toxicology tests developed in support of environmental laws use a single stress applied to an individual plant. While tests using individual species or stresses require fewer resources and are easier to interpret, they are under increasing criticism for being unrealistic and missing important ecological interactions. The objective of...
    Resource Type:
    Dissertation
    Full Text:
    wheat and wild oats AN ABSTRACT OF THE THESIS OF Thomas G. Pfleeger for the degree of Doctor of