Fig. 2
From: Impact of long-term industrial contamination on the bacterial communities in urban river sediments
Alpha diversity of sediment samples from different types of industrial pollutions. (a) Richness, indicated by Ace, Ace species richness estimator: higher values represent higher diversity. (b) Diversity, indicated by Shannon, the Shannon index: higher values represent higher diversity. * P < 0.05, ** P < 0.01, *** P < 0.001. (c) Rarefaction curves of OTUs clustered at 97% sequence identity across the twelve samples