A non-metric multidimensional scaling plot based on Bray-Curtis dissimilarity of bacterial taxonomic composition across samples is illustrated. The run stress was 0.10, indicating a good fit. Ellipses indicate the dispersion of group based on a weighted covariance matrix of samples distance from the centroid. Individual samples are colored by environment: stormwater=coral, sewage=yellow-green, rivers=green, harbor=blue, lake=purple.