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Filtering by: Subject Lichens--Growth Remove constraint Subject: Lichens--Growth 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 (version 2)

    Creator:
    Kovasi, Adrienne I.
    Abstract:
    All the datasets used in Kovasi's (2022) masters thesis. Chapter 2: The datasets are elemental concentrations for 25 elements from samples of the saxicolous lichens Umbilicaria phaea (n = 51), Rhizoplaca melanophthalma (n = 20), and the epiphytic lichen Letharia vulpina (n = 16) from the southern Sierra Nevada and...
    Resource Type:
    Dataset

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

    Creator:
    Kovasi, Adrienne I.
    Abstract:
    All the datasets used in this masters thesis. Chapter 2: The datasets are elemental concentrations for 25 elements from samples of the saxicolous lichens Umbilicaria phaea (n = 51), Rhizoplaca melanophthalma (n = 20), and the epiphytic lichen Letharia vulpina (n = 16) from the southern Sierra Nevada and San...
    Resource Type:
    Dataset

  • Lichen distribution in Oregon coastal dune communities

    Creator:
    Leuthner, Shirley Mae
    Abstract:
    Distribution of lichens was studied at seven coastal dune sites in Oregon. Lichens were sampled in the dry stable, dry meadow, meadow, rush meadow, marsh, shrub and forest deflation plain communities. Observations were made of the standing water in the marsh community. Quantitative measurements were made of the percent organic...
    Resource Type:
    Masters Thesis
    Full Text:
    century crude methods of measuring the rate of growth of some lichen species were used (Herre, 1904). A

  • Factors limiting the distribution of the sensitive lichen Usnea longissima in the Oregon Coast Range : habitat or dispersal?

    Creator:
    Keon, Dylan B.
    Abstract:
    The sensitive lichen Usnea longissima Ach., formerly a fairly common circumboreal species, has been extirpated from much of its range (e.g., Eastern Europe). Although the U.S. Pacific Northwest (PNW) remains a relative stronghold for the species, U longissima faces increasing pressure in the region from habitat loss, air pollution, and...
    Resource Type:
    Masters Thesis
    Full Text:
    Factors limiting the distribution of the sensitive lichen

  • 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:
    , north of Whitebird, were surveyed for rare riparian lichen species. The region was stratified into nine

  • Ecophysiology of the cyanolichen Lobaria oregana

    Creator:
    Antoine, Marie E.
    Abstract:
    This thesis consists of three manuscripts describing ecophysiological research on the cyanolichen Lobaria oregana. The first manuscript includes a re-evaluation of the assumptions underlying past estimates of N fixation by this species and provides an estimate of annual N fixation at the Wind River Canopy Crane (WRCC). Based upon litterfall...
    Resource Type:
    Masters Thesis
    Full Text:
    biomass data, N content of lichen tissue, and published growth rates, L. oregana fixes 0.4-1.6 kg N2 ha1

  • Pendent Usnea (Lichens; Ascomycetes; Parmeliaceae) in Western Oregon : taxonomy; morphological characters; and geographical distribution

    Creator:
    Pittam, Sherry K.
    Abstract:
    Pendent Usnea species were collected in western Oregon and examined. Character states, such as cortex-medulla-axis ratio; fibril length; papilla diameter; branching patterns; and presence or absence of fibrils, papillae, soredia, isidia; plus chemistry, were recorded and analyzed by inspection for differences. Historical names were researched in the literature. A comparison...
    Resource Type:
    Masters Thesis
    Full Text:
    called a thallus. The fungus consists of minutely tiny thread-like material called hyphae. In the lichen

  • 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:
    ., Rubio-Salcedo, M., & Gauslaa, Y. 2015. Epiphytic lichen growth in Mediterranean forests: Effects of

  • 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:
    degree of Doctor of Philosophy in Botany and Plant Pathology presented on June 30. 2005. Title: Lichen

  • 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:
    lichen hotspots with canopy gaps, old-growth remnants, and wolf trees (for details, see Neitlich