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  • 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:
    critical thinking, David Dalton for the open door to his lab at Reed College, Joey Spatafora and Dan

  • Fungal diversity within decomposing woody conifer roots in Oregon

    Creator:
    Vandegrift, V. Eleanor
    Abstract:
    Previous studies have indicated that roots from five tree species (Picea sitchensis, Tsuga heterophylla, Pseudotsuga menziesii, Pinus ponderosa, and Pinus contorta) decompose at different rates across an environmental gradient in Oregon. Measurements of wood chemistry from each tree species as well as moisture and temperature from each location do not...
    Resource Type:
    Masters Thesis
    Full Text:
    and Joey Spatafora for all of their help, never- ending ideas, and encouragement during my time at

  • Metabolomic Profiling of Natural Products from Two Tolypocladium Fungal Species as Part of An Evolutionary Genomics Study

    Creator:
    Dickey, Bailey J.
    Abstract:
    This thesis describes an investigation of the natural products chemistry of two fungal species of the genus Tolypocladium. Natural products are small organic molecules that are considered non-essential for cell growth and reproduction, and thus part of secondary metabolism. Chemical profiling of these secondary metabolites using a combination of high-performance...
    Resource Type:
    Masters Thesis
    Full Text:
    also like to extend my gratitude to Dr. Joey Spatafora and Rheannon Arvidson for their support and

  • Shrub epiphyte communities in relation to stand management in forests of western Oregon

    Creator:
    Rosso, Abbey L.
    Abstract:
    This dissertation describes the epiphyte communities on tall shrubs in forests of western Oregon, with a focus on potential effects of management practices on these communities. Shrubs and other hardwoods have recently gained recognition as hotspots of diversity for epiphytes in young conifer forests of the region. Yet little is...
    Resource Type:
    Dissertation
    Full Text:
    committee, Joey Spatafora, John Tappeiner, and Carol Mallory-Smith, for their input and support. For help

  • Examination of the role host-selective toxins play in fungal-plant interactions

    Creator:
    Andrie, Rachael M.
    Abstract:
    Pyrenophora tritici-repentis, causal agent of tan spot of wheat, produces multiple host-selective toxins (HSTs), including Ptr ToxA, encoded for by ToxA, Ptr ToxB, encoded for by ToxB, and Ptr ToxC. Variable distribution of these three HSTs among different isolates of P. tritici-repentis, both singularly and in all possible combinations, defines...
    Resource Type:
    Dissertation
    Full Text:
    my committee members, Dr. Joyce Loper, Dr. Tom Wolpert, Dr. Joey Spatafora, and Dr. Anita Azarenko

  • Cellular and molecular aspects of cnidarian-algal associations

    Creator:
    Schwarz, Jodi A.
    Abstract:
    Intracellular symbioses between cnidarians and dinoflagellates from the genus Symbiodinium are widespread throughout the marine environment. These associations are ecologically significant, especially in tropical waters where symbiotic interactions between corals and Symbiodinium culminate in the formation of limestone reefs. This thesis focuses on cellular and molecular aspects of the symbiosis,...
    Resource Type:
    Dissertation
    Full Text:
    research, many thanks to Tom Wolpert, Steve Giovannoni, Dahong Zhang, and Joey Spatafora. The Weis lab was

  • Onset of symbiosis in a cnidarian-dinoflagellate association

    Creator:
    deBoer, Melissa L.
    Abstract:
    Scleractinian corals, like many other cnidarians, engage in intracellular symbiosis with dinoflagellates belonging to the genus Symbiodinium. This association makes invaluable structural and energetic contributions to the marine environment and to the coral reef ecosystem in particular. While many aspects of the cnidarian-dinoflagellate relationship have been well studied, nothing is...
    Resource Type:
    Dissertation
    Full Text:
    committee; Joey Spatafora, Barb Taylor, Tom Wolpert, and Jean Hall, made it extraordinarily easy to

  • Temperature stress, gene expression, and innate immunity at the onset of cnidarian-dinoflagellate symbiosis

    Creator:
    Schnitzler, Christine E.
    Abstract:
    The intracellular mutualism between cnidarians and photosynthetic dinoflagellates (genus Symbiodinium) is responsible for the physical and trophic structure of diverse coral reef ecosystems. This relationship, based on nutrient exchange, allows for high productivity in tropical waters, which are generally nutrient-poor environments. Numerous environmental stressors currently threaten the health of corals,...
    Resource Type:
    Dissertation
    Full Text:
    Joey Spatafora for providing insights on phylogenetic analysis methods and for allowing me access

  • Host associations of Tricholoma magnivelare, the American matsutake

    Creator:
    Lefevre, Charles K.
    Abstract:
    Beginning in the 1980s, large-scale commercial harvest of Tricholoma magnivelare created a need for management of forests to ensure sustainability, but little was known of the biology or ecology of this species to guide management decisions. Four of the five studies presented here explore the basic synecology of T. magnivelare...
    Resource Type:
    Dissertation

  • Evolution and classification of bibionidae (Diptera: Bibionomorpha)

    Creator:
    Fitzgerald, Scott J.
    Abstract:
    The family Bibionidae has a worldwide distribution and includes approximately 700 species in eight extant genera. Recent studies have not produced compelling evidence supporting Bibionidae as a monophyletic group or identified the sister group to bibionids. Therefore, the purpose of this study is to examine the classification and evolution of...
    Resource Type:
    Dissertation