Title |
A metagenomic study of methanotrophic microorganisms in Coal Oil Point seep sediments
|
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Published in |
BMC Microbiology, October 2011
|
DOI | 10.1186/1471-2180-11-221 |
Pubmed ID | |
Authors |
Othilde Elise Håvelsrud, Thomas HA Haverkamp, Tom Kristensen, Kjetill S Jakobsen, Anne Gunn Rike |
Abstract |
Methane oxidizing prokaryotes in marine sediments are believed to function as a methane filter reducing the oceanic contribution to the global methane emission. In the anoxic parts of the sediments, oxidation of methane is accomplished by anaerobic methanotrophic archaea (ANME) living in syntrophy with sulphate reducing bacteria. This anaerobic oxidation of methane is assumed to be a coupling of reversed methanogenesis and dissimilatory sulphate reduction. Where oxygen is available aerobic methanotrophs take part in methane oxidation. In this study, we used metagenomics to characterize the taxonomic and metabolic potential for methane oxidation at the Tonya seep in the Coal Oil Point area, California. Two metagenomes from different sediment depth horizons (0-4 cm and 10-15 cm below sea floor) were sequenced by 454 technology. The metagenomes were analysed to characterize the distribution of aerobic and anaerobic methanotrophic taxa at the two sediment depths. To gain insight into the metabolic potential the metagenomes were searched for marker genes associated with methane oxidation. |
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