TABLE 2.

Indicator species of the H cluster of samples^a

Indicator value	Classificationb	Closest isolated relativec (GenBank accession no.)	Similarityd
1.000	Desulfosporosinus (Firmicutes)	Desulfosporosinus sp. strain 5apy (AF159120)	0.99
0.997	Desulfosporosinus (Firmicutes)	Desulfosporosinus sp. strain 5apy (AF159120)	0.99
0.980	UeBurkholderiales (Betaproteobacteria)	Vogesella indigofera ATCC 19706T (AB021385)	0.96
0.977	U.Peptococcaceae (Firmicutes)	Anaerobic bacterium Prop2 (AY756143)	0.93
0.971	Desulfosporosinus (Firmicutes)	Desulfosporosinus sp. strain 5apy (AF159120)	0.98
0.970	Desulfovibrio (Deltaproteobacteria)	Desulfovibrio putealis DSM 16056T (AY574979)	1.00
0.968	U Firmicutes	Clostridium sp. strain 9B4 (AY554416)	0.93
0.968	Desulfovibrio (Deltaproteobacteria)	Sulfate-reducing bacterium F1-7b (AJ012594)	1.00
0.959	U BRC1	Bacterium Ellin371 (AF498753)	0.83
0.948	Anaeromyxobacter (Deltaproteobacteria)	Anaeromyxobacter dehalogenans 2CP-1T ATCC BAA-258T (AF382396)	0.96
0.943	U Alphaproteobacteria	Endosymbiont of Acanthamoeba polyphaga (AF132138)	0.90
0.929	U Betaproteobacteria	Gallionella ferruginea subsp. capsiferriformans (DQ386262)	0.97
0.928	Thiobacillus (Betaproteobacteria)	Thiobacillus sajanensis 4HG (DQ390445)	0.99
0.906	U Bacteria	Spirochaetes bacterium SA-8 (AY695839)	0.87
0.890	Chloroflexi	Leptolinea tardivitalis YMTK-2T (AB109438)	0.99
0.883	Geothrix (Acidobacteria)	Geothrix fermentans H5 (U41563)	0.98
0.866	U Chlamydiales (Chlamydiae)	Chlamydiales bacterium CRIB 32 (EU363464)	0.89
0.847	U Betaproteobacteria	Ralstonia sp. strain 22 (EU304284)	0.97
0.836	Chloroflexi	Bacterium K-4b6 (AF524858)	0.96

^aP = 0.001 (1,000-bootstrap test in indicator species analysis), q < 0.05 (false discovery rate analysis of P values).

^bLowest classification indicated by RDP's classifier with an 80% bootstrap confidence.

^cClosest relative determined by RDP Seqmatch using a good-quality, nearly full-length data set.

^dSimilarity is measured against its closest relative.

^eU, undefined.