• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Biology
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Biology
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Environmental, biochemical and genetic drivers of DMSP degradation and DMS production in the Sargasso Sea

    Thumbnail
    View/Open
    Levine_etal_EMI_2012.pdf (2.990Mb)
    Date
    2011-10
    Author
    Levine, Naomi M.  Concept link
    Varaljay, Vanessa A.  Concept link
    Toole, Dierdre A.  Concept link
    Dacey, John W. H.  Concept link
    Doney, Scott C.  Concept link
    Moran, Mary Ann  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/5074
    As published
    https://doi.org/10.1111/j.1462-2920.2012.02700.x
    Abstract
    Dimethylsulfide (DMS) is a climatically relevant trace gas produced and cycled by the surface ocean food web. Mechanisms driving intraannual variability in DMS production and dimethylsulfoniopropionate (DMSP) degradation in open-ocean, oligotrophic regions were investigated during a 10 month time-series at the Bermuda Atlantic Time-series Study site in the Sargasso Sea. Abundance and transcription of bacterial DMSP degradation genes, DMSP lyase enzyme activity, and DMS and DMSP concentrations, consumption rates, and production rates were quantified over time and depth. This interdisciplinary dataset was used to test current hypotheses of the role of light and carbon supply in regulating upper-ocean sulfur cycling. Findings supported UV-A dependent phytoplankton DMS production. Bacterial DMSP degraders may also contribute significantly to DMS production when temperatures are elevated and UV-A dose is moderate, but may favor DMSP demethylation under low UV-A doses. Three groups of bacterial DMSP degraders with distinct intraannual variability were identified and niche differentiation was indicated. The combination of genetic and biochemical data suggest a modified ‘bacterial switch’ hypothesis where the prevalence of different bacterial DMSP degradation pathways is regulated by a complex set of factors including carbon supply, temperature, and UV-A dose.
    Description
    Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Environmental Microbiology 14 (2012): 1210-1223, doi:10.1111/j.1462-2920.2012.02700.x.
    Collections
    • Biology
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Preprint: Levine, Naomi M., Varaljay, Vanessa A., Toole, Dierdre A., Dacey, John W. H., Doney, Scott C., Moran, Mary Ann, "Environmental, biochemical and genetic drivers of DMSP degradation and DMS production in the Sargasso Sea", 2011-10, https://doi.org/10.1111/j.1462-2920.2012.02700.x, https://hdl.handle.net/1912/5074
     
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo