FIG. 3.

Heat map representation of phylogenetic data. The 16S rRNA gene sequences were assigned to phylogenetic bacterial taxonomic groups based on a naïve Bayesian rRNA classifier with an 80% confidence threshold, using RDP Classifier. The sample names are abbreviated as follows. The first letter or letter and number correspond to the site, as follows: H, HCK20.6; E1, EFK6.3; E2, EFK13.8; E3, EFK24.3; B, BCK12.3; and W, WCK3.9. The following letters MC or NB indicate a midchannel or near-bank sample. The last letter(s) indicates the month of collection, as follows: O, October; N, November; F, February; MR, March; M, May; J, July; and S, September.