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Filtering by: Creator Stewart, Ryan D. Remove constraint Creator: Stewart, Ryan D. Degree Field Microbiology Remove constraint Degree Field: Microbiology

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  • Linking phylogenetic identity and biogeochemical function of uncultivated marine microbes with novel mass spectrometry techniques

    Creator:
    Bryson, Samuel J.
    Abstract:
    The combined activities of diverse heterotrophic marine microorganisms significantly shape global biogeochemical cycles, but models of these activities are currently limited to aggregate microbial community processes, and it remains unclear how community structure and the functional roles of specific microbial taxa should be integrated into these models. Therefore, understanding the...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Ryan S. Mueller The combined activities of diverse heterotrophic marine microorganisms

  • The Genomic Capabilities of Microbial Communities Track Seasonal Variation in Arctic Lagoons

    Creator:
    Baker, Kristina D.
    Abstract:
    The lagoons spanning Alaska’s Beaufort Sea coast provide a unique habitat for arctic wildlife. These lagoons and the food webs they support face extreme seasonality with nine months of ice cover followed by a spring thaw that pulses a large amount of freshwater and nutrients into the lagoons. Bacteria link...
    Resource Type:
    Masters Thesis
    Full Text:
    members Ryan Mueller, Yvette Spitz, and Frank Chaplen for their invaluable feedback. I am also

  • Comparative genomics of Vibrio and characterizing microbial communities at a shellfish hatchery

    Creator:
    Delgado, Hanna
    Abstract:
    Vibrio bacteria are commonly found in freshwater, marine, and estuarine environments. Members of this genus can exist in commensal relationships with marine animals or as planktonic bacteria, however, they are well known for their roles as pathogens towards humans and animals. In this dissertation, I investigated aspects of host-bacteria relationships...
    Resource Type:
    Dissertation
    Full Text:
    Ryan S. Mueller Vibrio bacteria are commonly found in freshwater, marine, and estuarine

  • The Influence of Microbial Communities on Spatiotemporal Elemental Cycling in Coastal Margins Revealed by Community- and Population-level Genomics and Proteomics

    Creator:
    Kieft, Brandon P.
    Abstract:
    Biotic and abiotic processes at continent-ocean interfaces cycle a disproportionate mass of carbon and nutrients relative to their global surface area, and microbial activity is a principal determinant of organic and inorganic matter flux in these transition zones. Most studies using modern high-throughput ‘omics techniques to link microorganisms with costal...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: ______________________________________________________ Ryan S. Mueller Biotic

  • Effects of Anthropogenic Stressors on Seagrass and Coral Microbiomes

    Creator:
    Wang, Lu
    Abstract:
    Seagrasses and coral reefs play important roles in nutrient cycling, coastal protection, and maintaining marine biodiversity. However, these coastal marine organisms are declining globally due to anthropogenic stressors, such as rising ocean temperatures, ocean acidification, and eutrophication. These organisms live in close association with their microbiomes, which can be beneficial...
    Resource Type:
    Dissertation
    Full Text:
    Microbiomes Abstract approved: ______________________________________________________ Ryan S

  • Analysis of Mutations Affecting Cooperation in Pseudomonas aeruginosa Populations

    Creator:
    Robinson, Tanner M.
    Abstract:
    In a process called quorum sensing (QS), the bacterial pathogen Pseudomonas aeruginosa uses small diffusible signals to coordinate cooperative behaviors via secreted “public goods”. Under QS-dependent growth conditions, social cheaters arise with mutations in lasR, the gene for the primary QS signal receptor. These cheaters do not produce public goods....
    Resource Type:
    Masters Thesis
    Full Text:
    PA O1 las R rpo S5 rpo S: :G mR ps dR 1 ps dR 1 r po S5 0 2 4 6 8 Zo ne D is ta nc

  • The Evolution of Scleractinian Microbial Symbionts

    Creator:
    McMinds, Ryan C.
    Abstract:
    The modern world has presented many threats to the health and stability of ecosystems worldwide. One of the most biodiverse ecosystems, coral reefs, faces particularly strong pressures, and is already declining rapidly in complexity and area. Although the stressors that affect reefs are diverse, ranging from nutrient pollution to overfishing,...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Ryan McMinds for the degree of Doctor of Philosophy in Microbiology presented on December

  • Cooxidation by three butane-grown bacteria and mechanism-based inactivation of butane monooxygenase

    Creator:
    Storfa, Ryan T.
    Abstract:
    Butane-grown cells of Pseudomonas butanovora, Nocardioides sp. CF8 and Mycobacterium vaccae JOB5 were tested for their ability to cooxidize methane, ammonia and ethylene. Less than 10 nmol of methane were degraded by each of the bacteria (0.17-0.35 mg protein) in 30 minutes. Hydroxylamine and nitrite accumulated when Nocardioides CF8 and...
    Resource Type:
    Masters Thesis
    Full Text:
    inactivation of butane monooxygenase AN ABSTRACT OF THE THESIS OF Ryan T. Storfa for the degree of Master

  • How Do Parasites Infect Salmon? Comparative Transcriptomics Reveal Myxozoan Adaptations for Parasitism

    Creator:
    Americus, Benjamin
    Abstract:
    The phylum Cnidaria contains three main branches: Anthozoa (corals, sea anemones) Medusozoa (jellyfish, hydra), and Endocnidozoa. This latter branch is characterized by parasitism and contains the microscopic fish-parasites Myxozoa. Myxozoa are highly simplified, consisting of only a few cell types, however they have retained the nematocyst stinging cells and complex...
    Resource Type:
    Dissertation
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    Parasitism. Abstract approved: ______________________________________________________ Stephen D

  • Investigating Vibrio parahaemolyticus interactions with the Pacific oyster, Crassostrea gigas

    Creator:
    Aagesen, Alisha M.
    Abstract:
    Vibrio parahaemolyticus is a Gram-negative, halophilic, human pathogenic bacterium ubiquitous in the marine environment. Like many Vibrio species, V. parahaemolyticus commonly associates with shellfish, particularly oysters. Ingestion of a raw or under cooked oysters contaminated with V. parahaemolyticus can cause gastroenteritis, which is typically self-limiting and rarely causes death. Globally,...
    Resource Type:
    Dissertation
    Full Text:
    committee, Drs. Malcolm Lowry, Martin Schuster, Yi-Cheng Su, and Lawrence Ryan, for their guidance