Fig. 2

Diversity of the core gut (A, B, C, D) and skin (E, F, G, H) microbiota (ASVs) for A. inornatus from SBluG (red), A. neomexicanus from SBluG (magenta), A. neomexicanus from SNW (purple), and A. marmoratus from SNW (blue), assuming a 50% core threshold (i.e., to be considered part of the core, a microbial taxon must be present on at least half of the animals in a population). A and E show each population's core diversity. B and F show each population's percent core diversity. C and G show each population's core unique diversity. D and H show each population's percent unique core diversity. All panels are based on 500 bootstraps of 15 lizards from each population using the methods outlined in Chao et al [93, 94]. Significant differences, as determined by overlap of 83.4% confidence intervals, are indicated with an “s.” Additional information on the core microbiota, including analyses of alternative metrics and Venn diagrams, can be found in Additional file 2