The anaerobic oxidation of methane by some archaeons may occur syntrophically with these organisms.

Question

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Sulfate-reducing bacteria are known to be involved in syntrophic relationships with methane-oxidizing archaea. This is because sulfate-reducing bacteria oxidize organic compounds using sulfate as a terminal electron acceptor, producing hydrogen sulfide as a waste product. The hydrogen sulfide can then be used by the methanogenic archaea as an electron acceptor in the anaerobic oxidation of methane, allowing them to convert methane to carbon dioxide and water while producing energy for both organisms.

The Anaerobic Oxidation of Methane by Some Archaeons May Occur