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α-diversity indices. (A) Rarefaction curve for each sample library colored by sample type indicating sufficient sequencing depth for estimated microbial richness. (B) Observed richness of sub-OTUs grouped by sample type (C) Shannon diversity index grouped by sample type. Lettering corresponds to significantly different groups (p < 0.05) using Wilcoxon pairwise rank sum test with Bonferroni correction.
