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Filtering by: Creator Johnson, Bruce Remove constraint Creator: Johnson, Bruce Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology

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  • Lichen Biomonitoring from Valley to Alpine in Central and Southern California

    Creator:
    Kovasi, Adrienne I.
    Abstract:
    In the mountains of central and southern California, high elevation wilderness areas lack epiphytic lichens that can be used to inform us about atmospheric deposition in multiple ways. Epiphytic lichens are capable of accumulating elements proportionally to the local atmospheric concentration, establishing them as commonly used biomonitor of key elements....
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Bruce McCune In the mountains of central and southern California, high elevation wilderness

  • 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:
    Lichens of Northern Idaho. Abstract Approved Bruce McCune Riparian forests in the Idaho Panhandle

  • Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA

    Creator:
    Nelson, Peter R.
    Abstract:
    Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen community and ecological trait structure along environmental gradients,...
    Resource Type:
    Dissertation
    Full Text:
    approved: Bruce McCune Lichens play many important roles in subarctic terrestrial ecosystems by fixing

  • 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:
    . Bruce McCuiie, much-loved and inspiring mentor. who provided insightful, patient guidance and

  • 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:
    Communities. Abstract approved: ______________________________________________________________ Bruce

  • 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:
    Abstract approved: Bruce McCune I focus on addressing knowledge gaps relating to management of

  • Community gradients of Arctic macrolichens in relation to succession, grazing and the environment

    Creator:
    Holt, Emily A.
    Abstract:
    The purpose of this dissertation was to define macrolichen community gradients in relation to succession, grazing and the environment. First, species scores indicating when macrolichen species appeared following disturbance were derived from the literature. Weighted averaging of these data with a community matrix created a successional score for each sample...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________________________ Bruce McCune The purpose of this dissertation was to define macrolichen community

  • Lichen Studies of Tropical Dry Forest: A Systematic and Ecological Approach

    Creator:
    Miranda-González, Ricardo
    Abstract:
    In recent years, our ecological knowledge of tropical dry forests has increased dramatically. However, whole components of the ecosystem, like lichenized fungi, remain mostly unknown. Crustose lichens in these forests are so abundant, that they are responsible for the characteristic appearance of a “white bark forest” during the dry season....
    Resource Type:
    Dissertation
    Full Text:
    : ___________________________________________________________ Bruce McCune In recent years, our ecological knowledge of tropical dry forests has

  • Lichen Functional Trait Variation Along an East-West Climatic Gradient in Oregon and Among Habitats in Katmai National Park, Alaska

    Creator:
    Spickerman, Kaleigh
    Abstract:
    Functional traits of vascular plants have been an important component of ecological studies for a number of years; however, in more recent times vascular plant ecologists have begun to formalize a set of key traits and universal system of trait measurement. Many recent studies hypothesize global generality of trait patterns,...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: ______________________________________________________ Bruce McCune Functional traits of

  • Ecological thresholds, climate extremes, and tree species' distributions across the Pacific coastal United States

    Creator:
    Lintz, Heather E.
    Abstract:
    Species' distributions across the landscape are perhaps the least understood yet most conspicuous features of life on earth. Ecologists have long studied species' distributions; yet, many questions remain about why species occur where they do. Such questions persist largely because species' distributions are complex systems with challenging properties like non-linearity,...
    Resource Type:
    Dissertation
    Full Text:
    approved: ___________________________________________________________________ Bruce McCune