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


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dc.contributor.author Hamdan, Leila J.
dc.contributor.author Gillevet, Patrick M.
dc.contributor.author Pohlman, John W.
dc.contributor.author Sikaroodi, Masoumeh
dc.contributor.author Greinert, Jens
dc.contributor.author Coffin, Richard B.
dc.date.accessioned 2011-06-02T18:46:56Z
dc.date.issued 2011-07-04
dc.identifier.uri http://hdl.handle.net/1912/4634
dc.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. en_US
dc.description.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. en_US
dc.description.sponsorship This work was supported by the Naval Research Laboratory Chemistry Division Young Investigator Program and the Office of Naval Research platform support program. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.relation.uri http://dx.doi.org/10.1111/j.1574-6941.2011.01133.x
dc.subject Bacteria en_US
dc.subject AOM en_US
dc.subject Marine sediment en_US
dc.subject Methane sulfate en_US
dc.subject 454-Pyrosequencing en_US
dc.title Diversity and biogeochemical structuring of bacterial communities across the Porangahau ridge accretionary prism, New Zealand en_US
dc.type Preprint en_US
dc.description.embargo 2012-05-19

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