FIG. 8.

Maximum parsimony tree of 16S rRNA gene sequences from Gamma-, Beta-, and Epsilonproteobacteria and unidentified sequences obtained in this study, as well as from the GenBank database. The bootstrap values at the nodes are percentages based on 500 replicates. The names in brackets are those of well-known cold seeps and hydrothermal vents. Sequences from this study are indicated by bold type, and the numbers in parentheses indicate the numbers of sequences with 98% identity to the relevant sequences from the white mat, the sediment underlying the white mat, the orange mat, and the sediment underlying the orange mat. Only selected sequences are displayed. Sequences that are targeted by Arc94 and Mγ705 are indicated.