3.1 Genetic structure
We found no evidence of genetic differentiation among populations of the copper moss S. cataractae . The AMOVA test showed a very low percent of genetic variation among populations (0.01%; φ = 0.0001), and the randomization test performed on the output of the AMOVA was not significant (p-value = 0.462). Similarly, the permutation test carried out to assess the significance of the G-statistic was not significant (G-stat = 83712.2; p = 0.839). The lack of genetic differences among populations is shown in Fig. S1.