Figure 7.

Taxonomic distributions of 16S rRNA community profile within anode electrogenic biofilms. (a) The phylum or class-level taxonomic profiles for the duplicate MFC anode biofilms (a and b) fed with four different substrates at 1 month, 2 months and 3 months of enrichment, and the original inoculum source of lagoon sediment (Lagoon 1). Phylum Proteobacteria and Firmicutes are divided into class-level taxonomies. Six dominant genera and two Bacteroidetes sp. phylotypes in the communities are shown in inner bars. (b) The taxonomic profiles for the duplicate SP anode biofilms (a and b) controlled to three different anode potentials at 1 month, 2 months, 3 months and 5 months of enrichment, and the original inoculum source of lagoon sediment (Lagoon 2). (c) Multidimensional scale plot comparing bacterial communities based on family-level taxonomy. The labels for operational conditions are depicted on the right side of the panel (reactor ‘a' for solid labels or ‘b' for open labels). The communities were taxonomically characterized at 1 month, 2 months, 3 months and 5 months as indicated by the numbers above the symbols.