Table 1.

Contribution rates and threshold ranges for environmental variables.

Species	Dominant Factors	Contribution/%	Threshold Value	Mean Value	Species	Dominant Factors	Contribution/%	Threshold Value	Mean Value
T. altaicus	Bio18	43.2	93.96–157.56 mm	125.76 mm	T. dschungaricus	T_PH_H2O	44.7	423, 964.56–553,077.70	488,521.13
	NDVI	24.4	150.14–240.11	195.13		Bio1	12.8	−3.92 to 3.94 °C	0.01 °C
	Bio6	9.4	−19.85 to −12.68 °C	−16.36 °C		NDVI	12.6	186.25–280.50	233.38
	Alt.	5.8	1170.81–2070.18 m	1620.50 m		Bio19	10.5	33.69–78.90 mm	56.3
	Bio4	4.8	1049.47–1229.15	1139.31		Bio4	7.6	789.71–1117.82	953.77
T. asiaticus	Bio3	37.4	27.08–38.76	32.92	T. lilacinus	T_PH_H2O	33.7	442,064.54–553,077.70	494,571.12
	Bio4	14.0	789.71–1221.34	1005.53		Bio18	19.0	174.35–281.20 mm	227.78 mm
	Bio17	9.1	21.60–78.90 mm	50.25 mm		Bio15	10.3	76.39–104.15	90.3
	Alt.	8.2	1269.52–2212.77 m	1741.14 m		T_USDA_TEX	5.9	442,064.53–5,553,077.70	497,571.11
	Bio5	7.7	0.73–26.31 °C	13.52 °C		Bio16	5.9	176.08–296.50 mm	236.29 mm
	Bio14	7.5	6.53–23 mm	14.77 mm		Bio4	4.8	789.71–1084.62	937.17
	NDVI	5.7	109.75–280.5	195.17		NDVI	4.2	161.16–280.50	220.83