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    • University of Missouri-Columbia
    • Graduate School - MU Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Theses (MU)
    • 2007 Theses (MU)
    • 2007 MU theses - Freely available online
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    Changes in stable carbon isotopes of methane along a salinity gradient in a hypersaline microbial mat system

    Potter, Elyn
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    [PDF] research.pdf (712.9Kb)
    Date
    2007
    Format
    Thesis
    Metadata
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    Abstract
    The purpose of this study was to examine how the stable carbon isotopes of methane and possible methanogenic substrates change in microbial mat communities as a function of salinity. Microbial mats were sampled from four different field sites located within the salterns of the Exportadora de Sal de C. V., Baja California Sur, Mexico. Samples were analyzed for the stable carbon isotopes of the particulate organic matter (POM), dissolved inorganic carbon (DIC), and dissolved methane within the mat. POM d13C values (-6.7 to -13.5 permil) and DIC d13C values (-1.4 to -9.6 permil) were similar to previously reported values. However, there are no prior reports of methane d13C values within the mats, and we found considerable variability among sites. Values range from -49.6 to -74.1 permil, and are most likely controlled by differences in the dominant metabolic pathways due to salinity differences.
    URI
    https://hdl.handle.net/10355/5089
    https://doi.org/10.32469/10355/5089
    Degree
    M.S.
    Thesis Department
    Geological sciences (MU)
    Collections
    • 2007 MU theses - Freely available online
    • Geological Sciences electronic theses and dissertations (MU)

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