Table 5. Relationships between the understory communities and the environmental factors as revealed by the Mantel test results.

Explanatory variables	R2	P
TD (Stem ha−1)	0.6752	0.005**
Aspect	0.0322	0.862
Slope (°)	0.0468	0.796
Slope Position	0.8001	0.001***
SMC (%)	0.1605	0.490
pH	0.0807	0.724
SOILCN (g kg−1)	0.6009	0.029*
TP (mg kg−1)	0.3753	0.173
SOILA (mg kg−1)	0.1295	0.588
AK (mg kg−1)	0.4308	0.104
SOILM (mg kg−1)	0.6764	0.005**
MBC (mg kg−1)	0.0635	0.789
MBN (mg kg−1)	0.1053	0.536

Notes.

^*P < 0.05.

^**P < 0.01.

^***P < 0.001.

SOILCN

Soil C and N content

SOILA

Soil available nutrient content

SOILM

Soil Mg and Mn content

Other descriptions as in Table 2.