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Filtering by: Subject Air -- Pollution -- Research Remove constraint Subject: Air -- Pollution -- Research Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology

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  • Effect of kraft mill effluent on structure and function of periphyton communities

    Creator:
    Williams, Harvey Dean
    Abstract:
    Raw and biologically stabilized Kraft mill effluents were introduced into laboratory artificial streams at a ratio of 15 ml per liter of water over a two year period. Effluent from the stabilization pond of a second mill was introduced at concentrations of from 5 to 40 ml per liter of...
    Resource Type:
    Dissertation
    Full Text:
    Cooperative Water Pollu- tion and Fisheries Research Laboratories and Mr. Fred Billmaier who made the

  • 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:
    ..................................................................................................... 29 Chapter 3. Bioindication of Air Pollution in the Greater Central Valley of California. U.S.A

  • 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:
    are threatened by a number of factors including air pollution and land use practices. If we wish to

  • Yosemite region nitrogen deposition and patterns in the composition of lichen communities

    Creator:
    Hutten, Martin
    Abstract:
    This dissertation describes patterns in epiphytic macrolichen community composition along a nitrogen deposition gradient in the Yosemite region of the Sierra Nevada in California. This region is part of the largest federal air quality Class 1 designated air-shed in the western United States, covering the entire crest of the Sierra...
    Resource Type:
    Dissertation
    Full Text:
    (< 1 hour per site) of areas that exceed the N critical load. Keywords: Air pollution effects, Air