The dynamics of diversity indices for BFHS, BFAOM, and BFR2A samples: (A) Richness (total numbers of observed OTUs clustered at 97% sequence identity), (B) Faith’s phylogenetic diversity (PD), and (C) Pielou’s evenness (PE) for 168 days. For each biofilm sample, the DNA extracts from two biofilm grown-coupons were used for sequencing. The breakpoints correspond to lost samples.