Results of 16S rRNA-targeted pyrosequencing. (A) Dendrogram based on Bray-Curtis similarity values; (B) phylogenetic affiliation at the phylum level. Only phyla represented by >1% of the sequence reads in at least one sample are shown. Candidate divisions include OD1, OP10, OP3, TG-1, TM7, WS3, BD1-5, and WCHB1-60. The CFB group includes members of the Cytophagales, Flavobacteria, and Bacteroidetes.