Figure 8. Differences in microbial biogeographies of rodent and human digestive tract.

Principal coordinates analysis of Bray-Curtis distances between samples from mouse, rat and woodrat digestive tract (performed on all taxonomic groups at the genus level), grouped by (a) host (adonis: R² = 0.25; P ≤ 0.001) and (b) anatomic region (adonis: R² = 0.17; P ≤ 0.001). The percent of variation explained by each coordinate is indicated in parentheses. Venn diagrams demonstrating the taxon overlap between different hosts at the genus level for (c) large-intestinal mucus and (d) feces.