Results of significance testing for alpha and beta diversity metrics in T. scripta scute and environmental sample comparisons.

Alpha and beta diversity test corrected p-values are shown in scientific notation; significant results (corrected p-value ≤ 0.05) are indicated in bold. p-values shown are corrected using either a Satterthwaite approximation (alpha diversity) or Benjamini-Hochberg correction (beta diversity). “Substrate” was included as a fixed effect for linear mixed effect modeling of 18S Shannon diversity, Jaccard, Bray-Curtis and unweighted UniFrac, since we recovered significant differences between wood- and rock/concrete-associated microbial communities for these metrics (see Methods and Materials). env = shallow water environmental samples.