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.