Evaluation of viral compartmentalization.

*P values<0.05 (for Fst and SM) and bootstrap values>0.95 were considered statistically significant evidence of compartmentalization. P-values<0.05 and bootstrap values >0.95 are shown in bold and underlined. **Statistically significant evidence for compartmentalization after Bonferroni correction for multiple comparisons. °The number of migration events between the different populations in each phylogenetic tree. †AI: Association index, where 0 indicates maximum phylogenetic structure and 1 indicates panmixia. Results in italic type are results that changed (either to no significance of compartmentalization or significance of compartmentalization) when running the same analyses with collapsed identical sequences or the same number of sequences from each compartment. N/A Not applicable.