Figure 6

Phylogenetic distribution of bacteria based on 16S rRNA gene fragments PCR-amplified from anode biofilms in MFCs operated at different concentrations of NaCl. Abundance ratios of different groups of anode microbes classified at the class level are shown. For each sample, two patterns (A, B) are presented, which represent microbial communities in anode samples obtained from different sides of cassette electrodes.