Molecular phylogenetic and chemical analyses of the microbial mats in deep-sea cold seep sediments at the northeastern Japan Sea.

Extremophiles : Life Under Extreme Conditions
Shizuka ArakawaC Kato

Abstract

Microbial communities inhabiting deep-sea cold seep sediments at the northeastern Japan Sea were characterized by molecular phylogenetic and chemical analyses. White patchy microbial mats were observed along the fault offshore the Hokkaido Island and sediment samples were collected from two stations at the southern foot of the Shiribeshi seamount (M1 site at a depth of 2,961 m on the active fault) and off the Motta Cape site (M2 site at a depth of 3,064 m off the active fault). The phylogenetic and terminal-restriction fragment polymorphism analyses of PCR-amplified 16S rRNA genes revealed that microbial community structures were different between two sampling stations. The members of ANME-2 archaea and diverse bacterial components including sulfate reducers within Deltaproteobacteria were detected from M1 site, indicating the occurrence of biologically mediated anaerobic oxidation of methane, while microbial community at M2 site was predominantly composed of members of Marine Crenarchaeota group I, sulfate reducers of Deltaproteobacteria, and sulfur oxidizers of Epsilonproteobacteria. Chemical analyses of seawater above microbial mats suggested that concentrations of sulfate and methane at M1 site were largely decreased relati...Continue Reading

References

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Citations

Jan 17, 2012·Extremophiles : Life Under Extreme Conditions·Chih-Ying LayLyle G Whyte
Feb 14, 2009·Systematic and Applied Microbiology·Shi YanRudolf Amann
Dec 9, 2008·Systematic and Applied Microbiology·Paraskevi N PolymenakouAnastasios Tselepides
Oct 2, 2007·Environmental Microbiology·James J MoranChristopher H House
Feb 26, 2011·FEMS Microbiology Ecology·Valentin CrépeauAnne Godfroy
Sep 14, 2010·FEMS Microbiology Ecology·Magali ZbindenSébastien Duperron

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