Publication Date:
2022-05-25
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.
Description:
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:
This work was supported by the Naval Research Laboratory Chemistry Division Young
Investigator Program and the Office of Naval Research platform support program.
Description:
2012-05-19
Keywords:
Bacteria
;
AOM
;
Marine sediment
;
Methane sulfate
;
454-Pyrosequencing
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Format:
application/pdf
Permalink
