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  • 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...
    Resource Type:
    Dissertation
    Full Text:
    degree of Doctor of Philosophy in Plant Physiology presented on September 25, 1997. Title: EVOLUTION AND

  • The reflection of culture in biological evolution

    Creator:
    Yates, Dean Arnold
    Abstract:
    Kelso's theory of Biocultural Evolution states that as culture evolves, the variation between groups diminishes while the variation within groups increases. The theory is tested with stature, cephalic index and nasal index. Means and standard deviations for these traits are examined for 237 ethnic groups. The groups are organized according...
    Resource Type:
    Masters Thesis
    Full Text:
    The reflection of culture in biological evolution AN

  • 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...
    Resource Type:
    Dissertation
    Full Text:
    responsible. Fourth, I demonstrate that AMP gene duplication has occurred many times in the evolution of

  • 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...
    Resource Type:
    Dissertation
    Full Text:
    ancestry holds strong implications for human evolution. In view of the difficulties that evolutionists

  • 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
    Full Text:
    , ecology and evolution of a vertebrate metacommunity in Lassen Co., California. I use microsatellite

  • 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
    Full Text:
    inconsistent with one commonly held model for mitochondrial pseudogene evolution. In the final part, I

  • Evolution of Marine Resources Management: A Scientometric Analysis

    Creator:
    Bruno, Urli and Couillard, Guillaume
    Abstract:
    The field of marine resources management is very broad and diverse. It is also very dynamic as new and exciting research is being produced in emerging fields such as aquaculture and integrated management. This research proposes to evaluate the trends in research pertaining to the many fields within marine resources...
    Resource Type:
    Research Paper
    Full Text:
    trends in research pertaining to the many fields within marine resources management and discover what

  • Evolution and Current Trends in HACCP and Risk Assessment

    Creator:
    Busta, Frank F.
    Abstract:
    International concerns over food safety have accelerated the evolution and implementation of HACCP and risk assessment. Risk assessment and HACCP are constituents of the overall risk analysis process. Risk analysis includes risk management and risk communication in addition to risk assessment. Risk assessment is an integral constituent of the series...
    Resource Type:
    Conference Proceeding
    Full Text:
    Evolution and Current Trends in HACCP and Risk Assessment

  • 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
    Full Text:
    : Characterization, Ecology, Evolution and Regulation Abstract approved

  • Range Field Day 2008 progress report

    Creator:
    Oregon State University. Agricultural Experiment Station, Oregon State University. Department of Rangeland Ecology and Management, and Eastern Oregon Agricultural Research Center
    Resource Type:
    Technical Report
    Full Text:
    . Evolution in steppe with few large, hooved mammals. The American Naturalist 119:757-773. Manier, D.J