Fig. 4

Pairwise distances of gut microbiota composition, Δ(weighted UniFrac), and trophic ecology, Δ(δ15N) and Δ(δ13C), among all individuals within crater lakes Apoyo (A&C) and Xiloá (B&D). Gut microbiota differentiation is positively correlated with divergence in carbon values in both crater lakes and with nitrogen values in crater lake Xiloá (Pearson’s product-moment correlation)