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    Diversity and biogeochemical structuring of bacterial communities across the Porangahau ridge accretionary prism, New Zealand

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    Hamdan_FEMSEC_1574-6941_2011.pdf (1.025Mb)
    Date
    2011-07-04
    Author
    Hamdan, Leila J.  Concept link
    Gillevet, Patrick M.  Concept link
    Pohlman, John W.  Concept link
    Sikaroodi, Masoumeh  Concept link
    Greinert, Jens  Concept link
    Coffin, Richard B.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4634
    As published
    https://doi.org/10.1111/j.1574-6941.2011.01133.x
    Keyword
     Bacteria; AOM; Marine sediment; Methane sulfate; 454-Pyrosequencing 
    Abstract
    Sediments from the Porangahau ridge, located off the northeastern coast of New Zealand, were studied to describe bacterial community structure in conjunction with differing biogeochemical regimes across the ridge. Low diversity was observed in sediments from an eroded basin seaward of the ridge and the community was dominated by uncultured members of the Burkholderiales. Chloroflexi/GNS and Deltaproteobacteria were abundant in sediments from a methane seep located landward of the ridge. Gas-charged and organic rich sediments further landward had the highest overall diversity. Surface sediments, with the exception of those from the basin, were dominated by Rhodobacterales sequences associated with organic matter deposition. Taxa related to the Desulfosarcina/Desulfococcus and the JS1 candidates were highly abundant at the sulfate-methane transition zone (SMTZ) at three sites. To determine how community structure was influenced by terrestrial, pelagic, and in situ substrates, sequence data were was statistically analyzed against geochemical data (e.g., sulfate, chloride, nitrogen, phosphorous, methane, bulk inorganic and organic carbon pools) using the Biota-Environmental matching procedure. Landward of the ridge, sulfate was among the most significant structuring factors. Seaward of the ridge, silica and ammonium were important structuring factors. Regardless of the transect location, methane was the principal structuring factor on SMTZ communities.
    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 FEMS Microbiology Ecology 77 (2011): 518-532, doi:10.1111/j.1574-6941.2011.01133.x.
    Collections
    • Energy and Geohazards
    Suggested Citation
    Preprint: Hamdan, Leila J., Gillevet, Patrick M., Pohlman, John W., Sikaroodi, Masoumeh, Greinert, Jens, Coffin, Richard B., "Diversity and biogeochemical structuring of bacterial communities across the Porangahau ridge accretionary prism, New Zealand", 2011-07-04, https://doi.org/10.1111/j.1574-6941.2011.01133.x, https://hdl.handle.net/1912/4634
     
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