Fig. 4: Geochemical, microbial community, and gene abundance data from two sites showing sulfate-methane dynamics suggestive of recent increases in methane flux.
From: Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
Gravity cores GC1045 and GC1081 are located at gas hydrate mounds 3 and 4, respectively. Sulfate-methane transition depths in centimeters below seafloor are indicated by dashed lines. a shows methane concentrations and porewater sulfate, sulfide, and alkalinity, and b indicates percent abundances of dominant bacterial and archaeal classes, dominant anaerobic methanotrophic archaeal (ANME) families, and sulfate-reducing bacterial (SRB) genera. c Copy numbers of mcrA and dsrAB genes per gram bulk sediment. d Temporal progression of modeled AOM rates from 10 years before sampling to up to 2 years after sampling.
