Table 3.

Environment variables involved in modeling.

Environmental Variable Types	Environmental Variable Description	T. altaicus	T. asiaticus	T. dschungaricus	T. lilacinus
Bioclimate variables	Annual Mean Temperature (BIO1)	E	E	E	E
	Mean Diurnal Temperature Range (BIO2)	E	E	E	E
	Isothermality (BIO3)	E	E	E	E
	Temperature Seasonality (BIO4)	E	E	E	E
	Max Temperature of Warmest Month (BIO5)		E
	Min Temperature of Coldest Month (BIO6)	E	E	E
	Temperature Annual Range (BIO7)	E			E
	Mean Temperature of Wettest Quarter (BIO8)			E	E
	Mean Temperature of Driest Quarter (BIO9)			E
	Mean Temperature of Warmest Quarter (BIO10)	E
	Mean Temperature of Coldest Quarter (BIO11)		E	E
	Annual Precipitation (BIO12)	E		E	E
	Precipitation of Wettest Month (BIO13)	E	E
	Precipitation of Driest Month (BIO14)	E	E	E	E
	Precipitation Seasonality (BIO15)	E	E	E	E
	Precipitation of Wettest Quarter (BIO16)	E		E	E
	Precipitation of Driest Quarter (BIO17)	E	E
	Precipitation of Warmest Quarter (BIO18)	E	E	E	E
	Precipitation of Coldest Quarter (BIO19)	E		E	E
Topographic variables	Altitude (Alt.)	E	E	E	E
	Slope	E	E	E	E
	Aspect	E	E	E	E
	Vector ruggedness measure (VRM)	E	E	E	E
	Terrain roughness index (TRI)	E	E	E	E
Soil variables	Soil PH (T_PH_H2O)	E	E	E	E
	USDA soil texture classification (T_USDA_TEX)	E	E	E	E
Vegetation variables	Normalized difference vegetation index (NDVI)	E	E	E	E

Note: “E” means this environmental variable is elected.