The influence of ultramafic rocks on microbial communities at the Logatchev Hydrothermal field, located 15°N on the Mid-Atlantic Ridge

Perner, M., Kuever, J., Seifert, R., Pape, T., Koschinsky, A., Schmidt, K., Strauss, H. and Imhoff, Johannes F. (2007) The influence of ultramafic rocks on microbial communities at the Logatchev Hydrothermal field, located 15°N on the Mid-Atlantic Ridge FEMS Microbiology Ecology, 61 . pp. 97-109.

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Abstract

The ultramafic-hosted Logatchev hydrothermal field (LHF) on the Mid-Atlantic Ridge is characterized by high hydrogen and methane contents in the subseafloor, which support a specialized microbial community of phylogenetically diverse, hydrogen-oxidizing chemolithoautotrophs. We compared the prokaryotic communities of three sites located in the LHF and encountered a predominance of archaeal sequences affiliated with methanogenic Methanococcales at all three. However, the bacterial composition varied in accordance with differences in fluid chemistry between the three sites investigated. An increase in hydrogen seemed to coincide with the diversification of hydrogen-oxidizing bacteria. This might indicate that the host rock indirectly selects this specific group of bacteria. However, next to hydrogen availability further factors are evident (e.g. mixing of hot reduced hydrothermal fluids with cold oxygenated seawater), which have a significant impact on the distribution of microorganisms

Document Type: Article
Keywords: Logatchev hydrothermal field; Epsilonproteobacteria; Methanococcales; ultramafic-hosted
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-MI Marine Microbiology
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
ISSN: 0168-6496
Projects: Future Ocean
Expeditions/Models:
Date Deposited: 03 Dec 2008 16:52
Last Modified: 05 Jan 2017 09:24
URI: http://eprints.uni-kiel.de/id/eprint/1972

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