3.6 Recent demographic history
The results of SMC++ analysis revealed a difference in recent
demographic history between invasive and native populations (Figure 7).
Among all diploid populations, only the invasive population (LL)
experienced a recent decline in effective population size reflecting
founder events, while all native populations experienced a recent
expansion during the same time period. For more ancient time periods,
the population trajectories were almost similar across all populations,
suggesting an expansion since about 150 ka followed by a peak at about
60 ka and a subsequent decline, assuming mutation rate of 1e-8 and
generation length of one year.