Shared more. Cited more. Safe forever.
    • advanced search
    • submit works
    • about
    • help
    • contact us
    • login
    View Item 
    •   MOspace Home
    • University of Missouri-Columbia
    • Graduate Studies - Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Theses (MU)
    • 2012 Theses (MU)
    • 2012 MU theses - Access restricted to UM
    • View Item
    •   MOspace Home
    • University of Missouri-Columbia
    • Graduate Studies - Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Theses (MU)
    • 2012 Theses (MU)
    • 2012 MU theses - Access restricted to UM
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    advanced searchsubmit worksabouthelpcontact us

    Browse

    All of MOspaceCommunities & CollectionsDate IssuedAuthorAuthor/ContributorTitleSubjectIdentifierThesis DepartmentThesis AdvisorThesis SemesterThis CollectionDate IssuedAuthorAuthor/ContributorTitleSubjectIdentifierThesis DepartmentThesis AdvisorThesis Semester

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular AuthorsStatistics by Referrer

    Organic sulfur metabolisms in Eastern Lau Spreading Center hydrothermal vents

    Barker, Rachel
    View/Open
    [PDF] public.pdf (1.970Kb)
    [PDF] research.pdf (2.696Mb)
    [PDF] short.pdf (194.8Kb)
    Date
    2012
    Format
    Thesis
    Metadata
    [+] Show full item record
    Abstract
    [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Sulfur is a central element in deep-sea hydrothermal vent systems, and many thermophiles isolated from these environments have sulfur-based metabolisms. However, it is not known what role organic sulfur compounds might play in deep-sea vent microbial ecology. Geochemical models are used to predict fluid compositions resulting from mixing of end-member hydrothermal fluids from the Eastern Lau Spreading Center (ELSC) with bottom seawater. These fluid compositions combined with estimated activities of dimethylsulfide and methanethiol are used to evaluate the potential for organic sulfur-based metabolisms under hydrothermal conditions. The transition temperature at which aerobic metabolisms outcompete anaerobic metabolisms varies (from ~75˚C to >200˚C) with end-member vent fluid chemistry. Aerobic respiration has the highest energy yields (> 575 kJ/mol C) at lower temperatures, while anaerobic metabolisms such as sulfate reduction and methanogenesis are favored at higher temperatures (~100˚C to 200˚C). Enrichment cultures targeting organic sulfur-based metabolisms inoculated with ELSC chimney slurries were successfully established. The cultures contained species of Thermococcales, ε-Proteobacteria, Thermales, and Aquificales as well as 2 novel bacterial sequences. These data suggest that organic sulfur-based metabolisms may be viable within deep-sea hydrothermal vents.
    URI
    http://hdl.handle.net/10355/15387
    Degree
    M.S.
    Thesis Department
    Geological sciences (MU)
    Rights
    Access is limited to the campuses of the University of Missouri.
    Collections
    • 2012 MU theses - Access restricted to UM
    • Geological Sciences electronic theses and dissertations (MU)

    Send Feedback
    hosted by University of Missouri Library Systems
     

     


    Send Feedback
    hosted by University of Missouri Library Systems