Factors Influencing Bacterial Diversity and Community Composition in Municipal Drinking Waters in the Ohio River Basin, USA
Fig 3
Nonmetric multidimensional scaling (NMDS) analysis of tap water bacterial assemblages (3D stress = 0.12).
A. Sample coordinates plotted with fitted environmental variables. Symbols represent disinfectant and are scaled by total chlorine concentration. For the fitted environmental parameters, arrows indicate the magnitude and direction of the correlation with microbial community composition. Significantly correlated variables are noted with asterisks. B. NMDS results showing taxa with minimum relative abundances ≥ 5%. Taxa are displayed at their centroid coordinates. Numbers denote the domain, phylum or sub-phylum level classification as defined in the legend. Taxa discussed in the text are indicated.