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    Gradients in dimethylsulfide, dimethylsulfoniopropionate, dimethylsulfoxide, and bacteria near the sea surface

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    m295p033.pdf (286.2Kb)
    Date
    2005-06-23
    Author
    Zemmelink, Hendrik J.  Concept link
    Houghton, Leah A.  Concept link
    Sievert, Stefan M.  Concept link
    Frew, Nelson M.  Concept link
    Dacey, John W. H.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4494
    As published
    https://doi.org/10.3354/meps295033
    DOI
    10.3354/meps295033
    Keyword
     Marine sulfur; Bacteria; Depth profiles; Microlayer sampling; Coastal waters; DMS; DMSP; DMSO 
    Abstract
    Gradients of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), dimethylsulfoxide (DMSO), and bacterial numbers and diversity from the surface microlayer to 500 cm depth were assessed in coastal waters surrounding the Martha’s Vineyard Coastal Observatory, Massachusetts, USA. Microlayer samples were collected with a surface skimmer: a partially submerged, rotating glass cylinder (‘drum’) that allows the collection of a thin layer of water by adherence to the drum. A depletion of DMS towards the water surface (10 cm) was found at all sampling days, with largest gradients during rough sea surface conditions. The steep gradients show that gas fluxes and transfer velocities, based on the concentration disequilibrium between the water and the atmosphere, need to be based on near surface gas concentration values. Elevated DMSP, DMSO concentrations and bacterial numbers were found at the sea surface during calm conditions. Although degassing and photo-oxidation on the skimmer will bias the microlayer data, the results indicate stratification of DMSP, DMSO and bacteria during periods of smooth sea surface conditions.
    Description
    Author Posting. © Inter-Research, 2005. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 295 (2005): 33-42, doi:10.3354/meps295033.
    Collections
    • Biology
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Marine Ecology Progress Series 295 (2005): 33-42
     

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