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Aerobic and anaerobic methanotrophs in the Black Sea water column

Publikationsart Peer-reviewed
Publikationsform Originalbeitrag (peer-reviewed)
Autor/in Schubert Carsten J., Coolen Marco J. L., Neretin Lev N., Schippers Axel, Abbas Ben, Durisch-Kaiser Edith, Wehrli Bernhard, Hopmans Ellen C., Damste Jaap S. Sinninghe, Wakeham Stuart, Kuypers Marcel M. M.,
Projekt R'EQUIP 2002: Anaerobic oxidation of methane in sediments and water column of the Black Sea and in lakes of Switzerland
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Originalbeitrag (peer-reviewed)

Zeitschrift ENVIRONMENTAL MICROBIOLOGY
Volume (Issue) 8(10)
Seite(n) 1844 - 1856
Titel der Proceedings ENVIRONMENTAL MICROBIOLOGY
DOI 10.1111/j.1462-2920.2006.01079.x

Abstract

Inputs of CH4 from sediments, including methane seeps on the continental margin and methane-rich mud volcanoes on the abyssal plain, make the Black Sea the world’s largest surface water reservoir of dissolved methane and drive a high rate of aerobic and anaerobic oxidation of methane in the water column. Here we present the first combined organic geochemical and molecular ecology data on a water column profile of the western Black Sea. We show that aerobic methanotrophs type I are responsible for methane oxidation in the oxic water column and ANME-1- and ANME-2-related organisms for anaerobic methane oxidation. The occurrence of methanotrophs type I cells in the anoxic zone suggests that inactive cells settle to deeper waters. Molecular and biomarker results suggest that a clear distinction between the occurrence of ANME-1- and ANME-2-related lineages exists, i.e. ANME-1-related organisms are responsible for anaerobic methane oxidation below 600 m water depth, whereas ANME-2-related organisms are responsible for this process in the anoxic water column above approximately 600 m water depth.
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