FIG 6.

Distances between bioreactor samples based on unweighted UniFrac distances (near-full-length bacterial 16S rRNA gene characterizations) (a) and COG contents (calculated as Pearson distance) (b) from R1 to R4 for days 809 and 914. Bootstrap support values are shown for 100 rarefactions each. Separate scale bars are shown beneath each tree. Replicate bioreactors under the same operating conditions that successfully clustered are shaded (R3 and R4, treatment [high ammonia concentrations]; R1 and R2, control [low ammonia concentrations]).