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. 2017 May 31;8:956. doi: 10.3389/fmicb.2017.00956

FIGURE 7.

FIGURE 7

Comparison of microbial community compositions derived from 16S rRNA amplicons of hNRB incubations with oils. (A) Relational tree generated using the UPGMA algorithm in MetaAmp. Microbial community compositions are represented at (B) at the phylum level excluding Proteobacteria and (C) at the class level for Proteobacteria only. Data are for incubations with the indicated oils without nitrate (0), with 10 mM nitrate (N1), with 10 and 20 mM nitrate (N2) or for incubations with additional toluene and 10, 20, 40, and 80 mM nitrate (N3), as in Figure 5; chromosomal DNA’s for these latter incubations with a given oil were combined.