Correlates of genetic diversity and differentiation with species’
characteristics
Genomic diversity across individuals has a strong positive relationship
with the harmonic mean of effective population size estimated from each
individual (Fig. 3A; R2 = 0.689). This association
remained when we took evolutionary history into account with
phylogenetic independent contrasts (Fig. 3C; R2 =
0.599). We may expect these patterns a priori because genomic
diversity and population sizes should be directly linked. In contrast,
we found no relationship between genomic diversity and HWI measurements
across individuals (Fig. 3B, Fig. 3D).
Genomic differentiation (as measured by FST) showed a
significant negative association with dispersal ability (measured by
HWI) (Fig. 5A). This relationship remained when accounting for
evolutionary history with PICs (Fig. 5C). Genomic differentiation showed
a negative non-significant negative association with harmonic mean of
effective population size (Fig. 5B, Fig. 5D).