Fig. 5From: Historical isolation and contemporary gene flow drive population diversity of the brown alga Sargassum thunbergii along the coast of ChinaEstimates of contemporary (m) (a) and historical gene flow (N m) (b) between S. thunbergii populations along the coast of China. Numbers above/below arrows represent migration rates in the direction of the arrow. The thickness of arrow is scaled according to the values. Population locations are shown in the map on the rightBack to article page