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. 2020 Aug 14;20:254. doi: 10.1186/s12866-020-01937-x

Fig. 2.

Fig. 2

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