FIGURE LEGENDS
Figure 1.-Landscape types and populations sampled across the Shunchang County and Xiapu County in China.
A. Shunchang County; B. Xiapu County
The intermediate scale with the two counties shaded is shown in the map below the fine scale maps of the two study areas, each with ten landscape types.
Figure 2.-Population structure analysis of M. alternatus at an intermediate scale.
Neighbor-joining phylogenetic tree of all individuals. (B) Principal component analysis of all individuals. (C) ADMIXTURE analysis, with only the K with the smallest CV error shown (K = 2). SC, Shunchang; XP, Xiapu.
Figure 3.-Smallest cross-validation error of genetic structure detected by ADMIXTURE at a fine scale (K = 2).
The two genetic clusters in Shunchang County (blue and green); (B) The two genetic clusters in Xiapu County (mint green and red). The size of each chart is proportional to the sample size. The gray area represents all forest habitats, and the white area represents other habitats.
Figure 4.-Mantel correlation tests between genetic distance and (A) Euclidian or (B) least-cost distance between pairs of populations.
Least-cost distances were calculated using the opinion method resistance surface relying on the land cover surface. Only the resistance surface 1 (B) and its resistance values (C) are shown, because the other three groups of resistance values were not significant.
Figure 5.-Principal coordinates analysis of predictor variables and fitted as trend surfaces a posteriori by generalized additive model in Shunchang County.
300 m, P. massoniana ; (B) 800 m, P. massoniana ; (C) 800 m, Mixed forest; (D) 800 m, Urban; (E) 1,000 m, P. massoniana ; (F) 1,000 m, Mixed forest; (G) 1,000 m, P. elliottii ; (H) 1,000 m, Farmland; (I) 1,000 m, Road.
Figure 6.-Principal coordinates analysis of predictor variables and fitted as trend surfaces aposteriori by generalized additive model in Xiapu County.
(A) 300 m, P. massoniana ; (B) 800 m, P. massoniana ; (C) 800 m, Mixed forest; (D) 800 m, P. elliottii ; (E) 1,000 m,P. massoniana ; (F) 1,000 m, Mixed forest; (G) 1,000 m, Farmland; (H) 1,000 m, Road: (I) 1,000 m, Urban.
Table 1. -Sampling point information