Table 1.

Microbial activity derived from reactive transport modeling.

	Unit	Western center			Southern center			Upper flank	Lower flank
		A2-2	24	MV12-1*	MD4-P1	MD4-P3	24-2	MV12-A	F6-3
Rate of anaerobic methanotrophy	mmol m−2 yr−1	858	861	872	943	1610	740	300	447
Rate of organic sulfate reduction	mmol m−2 yr−1	40.5	31.8	14.2	33.6	4.80	19.9	14.5	34.4
Rate of methaogenesis	mmol m−2 yr−1	24.2	32.9	52.2	20.0	68.0	36.6	1.78	5.57
Methane flux from depth	mmol m−2 yr−1	1020	1530	1150	1280	2990	972	347	456
AOM-filteration efficiency	%	84	56	76	74	54	76	86	98

*Parameters (core length and lower boundary conditions) are assumed to be the same as those for site A2-2 (Supplementary Table S4).