Hydrocarbon-related microbial processes in the deep sediments of the Eastern Mediterranean Levantine Basin

Rubin-Blum, Maxim and Antler, Gilad and Turchyn, Alexandra V. and Tsadok, Rami and Goodman-Tchernov, Beverly N. and Shemesh, Eli and Austin, James A. and Coleman, Dwight F. and Makovsky, Yizhaq and Sivan, Orit and Tchernov, Dan (2014) Hydrocarbon-related microbial processes in the deep sediments of the Eastern Mediterranean Levantine Basin. FEMS Microbiology Ecology, 87 (3). pp. 780-796. ISSN 0168-6496, ESSN: 1574-6941 DOI 10.1111/1574-6941.12264

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/1574-69...

Abstract

During the 2011 exploration season of the EV Nautilus in the Mediterranean Sea, we conducted a multidisciplinary study, aimed at exploring the microbial populations below the sediment–water interface (SWI) in the hydrocarbon-rich environments of the Levantine basin. Two c. 1000-m-deep locations were sampled: sediments fueled by methane seepage at the toe of the Palmachim disturbance and a patch of euxinic sediment with high sulfide and methane content offshore Acre, enriched by hydrocarbon from an unknown source. We describe the composition of the microbial population in the top 5 cm of the sediment with 1 cm resolution, accompanied by measurements of methane and sulfate concentrations, and the isotopic composition of this methane and sulfate (δ13CCH4, δ18OSO4, and δ34SSO4). Our geochemical and microbiological results indicate the presence of the anaerobic methane oxidation (AOM) coupled to bacterial sulfate reduction (BSR). We show that complex methane and sulfur metabolizing microbial populations are present in both locations, although their community structure and metabolic preferences differ due to potential variation in the hydrocarbon source.

Item Type: Article
Uncontrolled Keywords: 2013AREP; IA67; PhD.,
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: FEMS Microbiology Ecology
Volume: 87
Page Range: pp. 780-796
Identification Number: 10.1111/1574-6941.12264
Depositing User: Sarah Humbert
Date Deposited: 10 Apr 2014 17:04
Last Modified: 15 Apr 2014 20:26
URI: http://eprints.esc.cam.ac.uk/id/eprint/3017

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