Heat map of taxon relative abundance and hierarchical clustering of samples.
Taxon relative abundance is represented by the heatmap. Values are scaled by taxon relative abundance across all samples: red indicates a taxon with skewed distribution, with the presence of a taxon concentrated in one or two samples; white indicates an even distribution among samples; and blue represents lower relative abundance or absence. Both the taxa and samples were clustered using Bray-Curtis dissimilarities. The colors on the cluster dendrogram correspond to the environments in the NMDS plot in Fig2: coral = stormwater, yellow-green=sewage, green=rivers, blue=harbor, purple=lake.