carbon sink Archives

MAGs and metabolic potential in and on carbonates with low, intermediate and high AOM activity. We sequenced the surface and the interior of R1, R9 and Chimlet with low, intermediate and high AOM activity, respectively, and binned MAGs from these six metagenomes to investigate taxonomy and metabolic potential. MAGs shown were selected based on relative abundance, shown in parenthesis, with a focus on Proteobacteria on the rock surface because of their higher abundance compared to the interior (Fig. 2c). Find a full list of MAGs in supplementary table 3. Anaerobic methane oxidizing archaea dominated the rock interiors, Ca. Methanophaga, in particular, and Ca. Desulfaltia was the most abundant interior SRB suggesting it may be an ANME partner bacterium. In contrast, the surface communities and their metabolic potentials differed between rocks along with the AOM activity of the carbonate, methane supply strength, and oxygen concentrations. We indicated the difference in methane supply to the rocks estimated based on the in situ observations with arrow size. Further, oxygen concentrations were higher at the Del Mar (22 µM) vs. SMM800 (8 µM) seep. -- biorxiv.org

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Distinct Microbial Communities Within and On Seep Carbonates Support Long-term Anaerobic Oxidation of Methane and Novel pMMO Diversity

by Keith CowingFebruary 10, 2025February 10, 2025

At methane seeps worldwide, syntrophic anaerobic methane-oxidizing archaea and sulfate-reducing bacteria (ANME-SRB) promote carbonate precipitation and rock formation, acting as methane and carbon sink.

carbon sink

Distinct Microbial Communities Within and On Seep Carbonates Support Long-term Anaerobic Oxidation of Methane and Novel pMMO Diversity

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