Table 4A.

SRB community composition based on taxonomic information of the dsrB and 16S rRNA genes.

Family level	OTUs		Total abundance (%)
	16S rRNA	dsrB	16S rRNA	dsrB
Peptococcaceae	6	6	0–0.33	0.45–6.60
Desulfobacteraceae	51	42	1.26–4.97	9.60–34.05
Desulfobulbaceae	38	4	0.27–9.37	0.11–5.67
Syntrophaceae	6	42	0.007–0.34	4.23–7.50
Nitrosomonadaceae	1	–	0.01–0.62	–
Desulfarculaceae	26	–	0.32–5.82	–
Desulfovibrionaceae	1	–	0–0.01	–
Syntrophobacteraceae	52	–	0.13–0.77	–
Nitrospiraceae	12	–	0.10–1.16	–
Thermodesulfovibrionaceae	42	–	1.72–8.59	–

–, Not detected.