TABLE 2.

Taxonomic classification based on multiple methods

Taxon	ARBa	Total no. of sequences		% Sequence similarityd
		Classifiedb	Unclassifiedc
Phylum
Acidobacteria	955	88	41	38
Actinobacteria	491	452	39	38
Bacteroidetes	453	450	17	59
CD OD1	68	0	0	49
CD OP10	43	18	0	38
CD OP11	14	6	6	27
CD OP3	12	0	0	53
CD TM6	3	0	0	83
CD TM7	17	11	2	56
CD WS1	2	0	0	99
CD WS3	34	17	5	38
Chamydiae	2	2	10	88
Chlorobi	22	0	1	70
Chloroflexi	27	32	18	55
Cyanobacteria	12	6	57	38
Defferibacteres	0	0	2
Deinococcus-Thermus	1	0	3	100
Dictyoglomi	0	0	21
Fibrobacteres	11	0	0	60
Firmicutes	15	16	800	48
Gemmatimonadetes	251	195	33	38
Lentisphaerae	0	0	1
Nitrospira	59	47	0	38
Planctomycetes	243	174	22	38
Proteobacteria	1,690	1,631	506	21
Spirochaetes	3	1	5	38
Thermodesulfobacteria	0	0	4
Thermomicrobia	323	0	10	38
Thermotogae	0	0	1
Verrucomicrobia	103	89	50	43
Unclassified	35	1,654
Class
Alphaproteobacteria	374	368	13	21
Betaproteobacteria	485	475	0	43
Deltaproteobacteria	348	278	22	38
Epsilonproteobacteria	1	0	0	99
Gammaproteobacteria	478	468	7	38
Unclassified Proteobacteria	4

^aClassification based on ARB-generated tree. CD, candidate division.

^bSequences were considered classified if assigned to the same phylum using both SeqMatch and Classifier of the RDP.

^cUnclassified sequences were assigned to likely phylum based on Classifier results.

^dBased on ARB phylum level classification.