Fig. 5From: Compositional variation of the human fecal microbiome in relation to azo-reducing activity: a pilot studyBoxplots representing different alpha diversity metrics (observed OTUs, Chao1, Shannon, and Simpson diversity indices) among different azo-reducing activity grades. Significant differences were estimated by Kruskal–Wallis test, followed by non-parametric pairwise post hoc tests, and p-values that are < 0.05 are shownBack to article page