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Manganese- and iron-dependent marine methane oxidation

Beal, Emily J. and House, Christopher H. and Orphan, Victoria J. (2009) Manganese- and iron-dependent marine methane oxidation. Science, 325 (5937). pp. 184-187. ISSN 0036-8075.

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Anaerobic methanotrophs help regulate Earth’s climate and may have been an important part of the microbial ecosystem on the early Earth. The anaerobic oxidation of methane (AOM) is often thought of as a sulfate-dependent process, despite the fact that other electron acceptors are more energetically favorable. Here, we show that microorganisms from marine methane-seep sediment in the Eel River Basin in California are capable of using manganese (birnessite) and iron (ferrihydrite) to oxidize methane, revealing that marine AOM is coupled, either directly or indirectly, to a larger variety of oxidants than previously thought. Large amounts of manganese and iron are provided to oceans from rivers, indicating that manganese- and iron-dependent AOM have the potential to be globally important.

Item Type:Article
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House, Christopher H.0000-0002-4926-4985
Orphan, Victoria J.0000-0002-5374-6178
Additional Information:© 2009 American Association for the Advancement of Science. 18 December 2008; accepted 2 June 2009. We would like to thank M. Arthur for the use of his mass spectrometer, Z. Zhang and S. Goffredi for laboratory assistance, D. Walizer for technical assistance, and D. Jones for help with phylogenetics. We also thank the shipboard scientists, crew, and pilots of R/V Atlantis and R/V Western Flyer. Funding for this project has come from the National Science Foundation (MCB-0348492), National Aeronautics and Space Administration (NASA) Astrobiology Institute under NASA-Ames Cooperative Agreement NNA04CC06A, and the Penn State Biogeochemical Research Initiative for Education (BRIE) funded by NSF (IGERT) grant DGE-9972759. Sequences were submitted to GenBank and have accession numbers FJ264513 to FJ264602 and FJ264604 to FJ264884.
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Issue or Number:5937
Record Number:CaltechAUTHORS:20090804-142607950
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14795
Deposited By: Jason Perez
Deposited On:05 Aug 2009 17:40
Last Modified:09 Mar 2020 13:18

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