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  • Population genetics, ecology and evolution of a vertebrate metacommunity

    Creator:
    Manier, Mollie Kim
    Abstract:
    Population genetic structure is widespread in many organisms and can be found at small spatial scales. Fine-scale differentiation is the result of ecological and evolutionary processes working together to produce an overall pattern, but the relative importance of these factors in population differentiation is poorly understood. The goals of my...
    Resource Type:
    Dissertation
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    , Ecology and Evolution of a Vertebrate Metacommunity Abstract approved: Population genetic structure is

  • Secondary Metabolism in Tolypocladium : Characterization, Ecology, Evolution and Regulation

    Creator:
    Blount, Rheannon Rua
    Abstract:
    An increased understanding of secondary metabolism in fungi is important for both biological and societal reasons. The ascomycete genus, Tolypocladium, is an ideal system to explore secondary metabolism characterization, ecology, evolution and regulation. The genus produces and has the genomic potential to produce a wide array of metabolites. Paired with...
    Resource Type:
    Dissertation
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    : Characterization, Ecology, Evolution and Regulation Abstract approved

  • The genus Caenorhabditis : a system for testing evolutionary questions

    Creator:
    Raboin, Michael J.
    Abstract:
    Caenorhabditis elegans is arguably the best understood animal on the planet. Used for over 50 years to study development, we have a vast amount of knowledge of the inner workings of this worm. Our knowledge is incomplete, however, without placing this organism in its evolutionary and ecological context. In this...
    Resource Type:
    Dissertation
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    selection and examined the evolution of mitochondrial genome architecture. Through this, I have shown

  • Genome Organization in the Ectomycorrhizal Truffle Rhizopogon vesiculosus

    Creator:
    Lu, Dabao Sun
    Abstract:
    Rhizopogon vesiculosus is a common ectomycorrhizal (EM) symbiont of Pseudotusga menziesii (Douglas-fir) in the coast range of the Pacific Northwest. The species has been studied for its systematics, genet size, population structure, and competitive ability in several field and experimental studies. This thesis seeks to provide a more thorough characterization...
    Resource Type:
    Masters Thesis
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    reconstruction analyses support the resupinate fruiting body morphology and brown rot ecology as

  • New perspectives on evolutionary relationships within Pinus (Pinaceae) and within subsection Ponderosae (subgenus Pinus)

    Creator:
    Willyard, Ann Nachreiner
    Abstract:
    A fossil-calibrated phylogenetic framework based on exemplars from each of the four taxonomic sections within Pinus was created using multiple nuclear and chloroplast loci. Calibration at the well-defined subgeneric split within Pinus with either fossil leaves and cones (ca. 45 million years ago) or fossil wood (ca. 85 million years...
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    Dissertation
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    reticulate evolution in my phylogenetic trees. I build on the inferred ages for lineages and the mutation

  • The Consequences of Infelicity : The Effects of Unhappiness on Biological and Social Evolution

    Creator:
    Martinez, Jorge R.
    Abstract:
    In social and biological evolution, infelicity can operate as a driving motor to force change. In this essay, for life other than human, infelicity is equated with physical unfitness to compete for the resources of a specific niche. For humanity it is defined as the result of an incongruity between...
    Resource Type:
    Masters Thesis
    Full Text:
    unhappiness on biological and social evolution AN ABSTRACT OF THE THESIS OF Jorge R. Martinez for the

  • Phenotypic evolution as a response to thermal ecology in the ferocious waterbug Abedus herberti (Hemiptera: Belostomatidae)

    Creator:
    Pelegrin, Arthur Lomis
    Abstract:
    Over 150 years ago, C. Bergmann observed a within-species pattern of increasing body size as elevation and latitude increased. Bergmann’s data came from numerous endothermic taxa, but the pattern has since been documented among numerous poikilotherms and invertebrates. The ferocious waterbug Abedus herberti Hidalgo (Hemiptera: Belostomatidae) lives in isolated populations...
    Resource Type:
    Masters Thesis
    Full Text:
    . 4 Temperature has repeatedly been cited as a major factor in the evolution and ecology of

  • Generation of full-length cDNA clone and functional analysis of leader proteases of grapevine leafroll-associated virus-2

    Creator:
    Liu, Yu-Ping
    Abstract:
    Papain-like leader proteases are found in diverse families of human, animal, plant, and fungal positive-strand RNA viruses. In addition to autocatalytic processing, these proteases play a variety of roles in the virus life cycle. In particular, the leader protease (L-Pro) of a prototype member of the Closterovirus genus, Beet yellows...
    Resource Type:
    Dissertation
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    counterdefensive strategy in virus evolution (Ding and Voinnet, 2007; Li and Ding, 2006). Viral suppressors are

  • Adaptive diversity and divergence at frog antimicrobial peptide loci

    Creator:
    Tennessen, Jacob A.
    Abstract:
    In this dissertation I study evolutionary patterns at genes encoding antimicrobial peptides (AMPs) in frogs. AMPs are short, amphipathic, cationic, secreted proteins that kill bacteria and other pathogens through a non-catalytic mechanism that involves binding to and disrupting the microbial cell membrane. In many animal taxa, positive selection is much...
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    Dissertation
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    . Chapters 4 and 5 both concern AMP evolution in leopard frogs of the genus Rana (Lithobates), subgenus

  • Natural history and evolution of a color polymorphism in Rana pipiens, the northern leopard frog

    Creator:
    Hoffman, Eric A.
    Abstract:
    A primary goal of population genetics is to identify the role of microevolutionary forces in producing observed patterns of molecular and phenotypic variation. I conducted four studies in the northern leopard frog, Rana pipiens, to determine just how mutation, migration, genetic drift, and selection influenced, genetic structure of mitochondrial DNA...
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    Dissertation
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    degree of Doctor of Philosophy in Zoology presented on 9.2003. Title: Natural History and Evolution of a