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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...
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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...
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    : Characterization, Ecology, Evolution and Regulation Abstract approved

  • Evolution and ecology of the Ceanothus-Frankia symbiosis

    Creator:
    Jeong, Soon-Chun
    Abstract:
    The evolutionary relationship between Frankia and actinorhizal plants was evaluated by reconstructing molecular phylogenetic trees from nifH, 16S rDNA, and rbcL nucleotide sequences. Subgroupings in Frankia phylogenetic trees reconstructed from nifH and from 16S rDNA sequences were consistent in terms of plant origins of Frankia strains. Although the branching order...
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    Soon-Chun Jeong September 25, 1997 All Rights Reserved EVOLUTION AND ECOLOGY OF THE CEANOTHUS

  • Bridging the gap : the problem of vertebrate ancestry, 1859-1875

    Creator:
    Beeson, Roberta Jane
    Abstract:
    Determination of the Vertebrate pedigree was a particularly enigmatic problem for evolutionary morphologists of the early post-Darwinian period. At that time, practically no characteristics were known by which the Vertebrates could be linked to any of the other animal groups. Up to the 1850's, most research in embryology and anatomy...
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    evolution, whose many earlier versions Leydig considered just as conjectural and scientifically unsound as

  • 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...
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    selection and examined the evolution of mitochondrial genome architecture. Through this, I have shown

  • Phylogeny and zoogeography of glyptocephalines (Pisces: Pleuronectidae)

    Creator:
    Chiu, Tai-sheng
    Abstract:
    Hypotheses of phylogenetic and historical zoogeographic relationships of glyptocephalines (Glyptocephalus cynoglossus, G. zachirus, G. stelleri, Microstomus kitt, H. pacificus, H. achne, Embassichthys bathybius, and Tanakius kitaharae) were constructed based on comparative anatomy and external morphology. The phylogenetic approach was cladistic and character polarity was determined by using out-group comparison. One...
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    Boulenger (1902) and Thilo (1902a-c). He proposed a dendrogram that showed the evolution of flatfishes from

  • Evolutionary and ecological interactions affecting seaweeds

    Creator:
    Olson, Annette M.
    Abstract:
    The term "interaction" in evolutionary biology and ecology describes the relationships among variables in two classes of causal models. In the first, "interaction" refers to the influence of a single putatively causal variable on a variable of interest. In the second class of models, the term applies when a third...
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    Abstract approved: Jane Lubchenco The term "interaction" in evolutionary biology and ecology describes

  • 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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    reticulate evolution in my phylogenetic trees. I build on the inferred ages for lineages and the mutation

  • Black bear population ecology

    Creator:
    Lindzey, Frederick Grier
    Abstract:
    Despite relatively mild weather, black bears (Ursus americanus) in southwestern Washington entered dens and remained for an average of 126 days. Bears entered their dens during a 5-week period which began on 21 October. A significant difference (P < 0.05) was found among the average dates of den entrance of...
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    Black bear population ecology AN ABSTRACT OF THE

  • 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...
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    counterdefensive strategy in virus evolution (Ding and Voinnet, 2007; Li and Ding, 2006). Viral suppressors are