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. Author manuscript; available in PMC: 2020 Jul 1.
Published in final edited form as: Water Res. 2019 Apr 10;158:136–145. doi: 10.1016/j.watres.2019.04.014

Fig. 4.

Fig. 4.

Principal coordinate analysis (PCoA) derived from the weighted UniFrac distance matrix of phylogenetic bacterial community structures. PCoA1 and PCoA2 explained 36.80% and 24.70% of the total variance, respectively. The strength of statistically significant (P < 0.05) explanatory variables is shown with solid red arrows. For each biofilm sample, the DNA extracts from two biofilm grown-coupons were used for sequencing.