Fig. 2

Demographic histories of B. stricta. a Schematic representing divergence processes inferred by fastsimcoal2. Estimated divergence time, population size, and gene flow are indicated here and detailed in Additional file 1: Figure S4 and Tables S6. b Changes of effective population size through time in the four groups. Solid lines represent means, and shading represents 95% percentiles of estimates. Vertical dashed lines mark times of population divergence and expansion estimated by fastsimcoal2