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Profiles of microbiological and geochemical parameters in the HC carbonate (▪), MC (○), and MR (♦) core sediments. (A) Concentrations of methane. (B) δ13C values of methane. (C) Concentrations of sulfate. (D) Total cell counts evaluated by direct counting of acridine orange-stained cells. (E) Percentages of archaeal 16S rRNA genes in the total prokaryote 16S rRNA genes estimated by quantitative real-time PCR analysis.
