Metagenomic mapping of cyanobacteria and potential cyanotoxin producing taxa in large rivers of the United States.

In contrast, Shannon and Simpson diversity indexes were different between rivers (Kruskal–Wallis, p = 0.0031 and p = 0.0023, respectively), although post-hoc pairwise comparisons via Pairwise Wilcoxon Rank Sum Tests revealed only 4–5 pairwise differences between rivers that were marginally significant (all p values were just under 0.05 threshold) (Fig.

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