FIG. 6.

Phylogenetic tree generated by the neighbor-joining method showing the phylogenetic relationships among Wonju groundwater and livestock wastewater clones within the Bacteria based on analysis of ca. 400 bases of aligned 16S rDNA sequences. Only sequences that are not assigned to the Proteobacteria, the high-G+C gram-positive group, the low-G+C gram-positive group, or the Cytophaga-Flexibacter-Bacteroides group are represented in the tree. For sequence nomenclature, clone libraries in parentheses, accession numbers in quotation marks, and support for branch points, see the legend to Fig. 4. Methanobacterium thermoflexum in the Archaea served as the outgroup organism. The scale bar indicates 0.1 change per nucleotide.