Search Constraints

Start Over
Filtering by: Creator O'Neill, Larry W. Remove constraint Creator: O'Neill, Larry W. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Advisor Mccune, Bruce Remove constraint Advisor: Mccune, Bruce

Search Results

  • 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:
    were located in a more-or-less continuous swath across Oregon between 43°W and 45°W. Plots were

  • Contrasting Epiphytic and Ground Layer Macrolichen Communities along the Coast-to-inland Climatic Gradient in Oregon

    Creator:
    Glauser, Abby L.
    Abstract:
    Cyanolichens, lichens with a cyanobacterial photobiont, benefit our ecosystems by the fixation of atmospheric nitrogen into a usable form for other organisms. They are highly sensitive to air pollution and require liquid water for photosynthesis. Many cyanolichen species frequently occur on the ground in the Pacific Northwest, however, most macrolichen...
    Resource Type:
    Masters Thesis
    Full Text:
    captured by sampling epiphytes, and 39% by sampling the ground layer. Plots contained on average 18

  • 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:
    the Seward Peninsula in northwestern Alaska (65°14’-66°36’N, 162°44’-167°32’W). The elevation in

  • 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:
    ......................................................................................................................... 39 Lichen Thallus N Levels

  • 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

  • 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:
    Commencement June 2005 Doctor 0! Philosophy dissertation o! Surah Jovan presented on May 19 2005. A P P ROy

  • Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

    Creator:
    Marks, Jade A.
    Abstract:
    Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....
    Resource Type:
    Masters Thesis
    Full Text:
    .............................................................. 36 3.3 Thallus Nitrogen: Across Treatments and Between Study Sites ........... 39 3.4 Nitrogen

  • Canopy epiphyte studies in the central Oregon Cascades : implications for the management of Douglas-fir forests

    Creator:
    Sillett, Stephen Charles
    Abstract:
    This thesis includes four separate studies. The first two studies assessed edge effects in a 700-year-old forest. After 20 years of exposure, epiphyte assemblages on the clearcut edge were similar to those of the forest interior, but there were some differences in vertical distribution patterns. Several species restricted to the...
    Resource Type:
    Dissertation
    Full Text:
    -Year-Old Douglas-Fir Forest in the Western Cascades of Oregon 39 Abstract 40 Table of

  • 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:
    ......................................................................................................................................... 39 Nonparametric multiplicative regression (NPMR

  • 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:
    . ..................................................................................................................... 39 Discussion