Nitrification and Methane Oxidation

Owing to the presence of high sulfate concentrations in seawater, methanogenesis is not as important in marine sediments and seawater as it is in freshwater systems. Nevertheless, there are a few marine environments where methane is found. The situation in Scan Bay or Cape Lookout Bight sediments, or in the water column of the Black Sea or the Cariaco Basin, is largely analogous to that in stratified lakes. 

The observation from culture studies that methane oxidizers are capable of oxidizing NH3 (Dalton, 1977) and that NH3 oxidizers are capable of oxidizing 

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Roy R, Knowles R (1995) Differential inhibition by allylsulfide of nitrification and methane oxidation in freshwater sediment. Appl Environ Microbiol 61 4278 1283 Saiki K, Mogi T, Anraku Y (1992) Heme O biosynthesis in Escherichia coli the cyoE gene in the cytochrome bo operon encodes a protoheme IX famesyl transferase. Biochem Biophys Res Commun 189 1491-1497... 

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