The three subspecies have separate demographic history
The highly variable levels of genetic diversity in populations from
different subspecies hint that the three putative subspecies have
separate demographic histories. To test whether they indeed have evolved
separately, we built ten demographic models and used the ABC method to
select the models that best fit our observed data (Figure 3b). These
simulations indicate that model 10 provides the best fit. This model
treats the three subspecies as separate lineages, with gene flow betweenA. m. marina and A. m. eucalyptifolia . The posterior
probability of this model is 0.3774, much higher than the second-best
model 2 (Table 2). Notably, the gene flow between A. m. marinaand A. m. eucalyptifolia allowed in model 10 indicates that these
subspecies are not completely isolated, though separate.