FIG 3 .

D. acidovorans strains native to a bioreactor have distinct replication rates. Clades of similar D. acidovorans genomes were clustered on the basis of shared SNP frequencies (Fig. 2A). The PTRs are significantly higher (P = 0.005) for the strains growing in a thiocyanate bioreactor (clade 2) than for strains growing in the other environments. As the other clades are likely made up of contaminants (see text), this observation supports the conclusion that the bioreactor strains are active community members and not contaminants.