Results Geochemical Characterization of Sediments The vertical methane concentration profile in the inside microbial mat sediments showed a maximum (6.5 mM) at 3 cm below the seafloor (bsf) and a decreasing trend down to 13 cmbsf ( Figure 1 A), while the stable carbon isotopic composition (δ 13 C value) of methane showed an increasing trend around this interval ( Figure S3A ).
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Impact of Concurrent aerobic-anaerobic Methanotrophy on Methane Emission from Marine Sediments in Gas Hydrate Area.
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