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    Spatiotemporal distribution of marine magnetotactic bacteria in a aeasonally stratified coastal salt pond

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    Date
    2004-10
    Author
    Simmons, Sheri L.  Concept link
    Sievert, Stefan M.  Concept link
    Frankel, R. B.  Concept link
    Bazylinski, D. A.  Concept link
    Edwards, Katrina J.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/173
    As published
    https://doi.org/10.1128/AEM.70.10.6230-6239.2004
    DOI
    10.1128/AEM.70.10.6230-6239.2004
    Keyword
     Magnetotactic bacteria (MB); {gamma}-Proteobacteria 
    Abstract
    The occurrence and distribution of magnetotactic bacteria (MB) were studied as a function of the physical and chemical conditions in meromictic Salt Pond, Falmouth, Mass., throughout summer 2002. Three dominant MB morphotypes were observed to occur within the chemocline. Small microaerophilic magnetite-producing cocci were present at the top of the chemocline, while a greigite-producing packet-forming bacterium occurred at the base of the chemocline. The distributions of these groups displayed sharp changes in abundance over small length scales within the water column as well as strong seasonal fluctuations in population abundance. We identified a novel, greigite-producing rod in the sulfidic hypolimnion that was present in relatively constant abundance over the course of the season. This rod is the first MB that appears to belong to the {gamma}-Proteobacteria, which may suggest an iron- rather than sulfur-based respiratory metabolism. Its distribution and phylogenetic identity suggest that an alternative model for the ecological and physiological role of magnetotaxis is needed for greigite-producing MB.
    Description
    Author Posting. © American Society for Microbiology, 2004. This article is posted here by permission of American Society for Microbiology for personal use, not for redistribution. The definitive version was published in Applied and Environmental Microbiology 70 (2004): 6230-6239, doi:10.1128/AEM.70.10.6230-6239.2004.
    Collections
    • Biology
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Applied and Environmental Microbiology 70 (2004): 6230-6239
     

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