* significant (P <0.05),** significant (P <0.01); elevation (m), soil total nitrogen (g· kg-1), soil available potassium (mg· kg-1), adult density (stems· ha-1), and canopy density (%).
According to the fitting results for both LMMs (Table 2), the density of regenerated individuals was more significantly related to elevation (P = 0.008), TN (P = 0.012), AP (P = 0.022), and adult density (P = 0.027) than to other environmental factors; the species richness of regenerative individuals was most significantly related to TN (P = 0.061), elevation (P = 0.029), and canopy density (P = 0.034).