Table 1. Environmental variables used in the model.

	Minimum value	Maximum value	Knot value	Delta deviance	Rank
Precipitation of wettest quarter1	450	1034	707	4.72	1
Mean temperature of coldest quarter2	-109	43	-3	0.62	2
Elevation3	1	1895.27	1st: 307.97 2nd: 830.34	0.49	3
Mean temperature of warmest quarter4	144	253	242.02	0.00	4

1. Unit: Milimeters

2. Scaling Factor: 10, Unit: Degrees Celsius

3. Unit: Meters

4. Scaling Factor: 10, Unit: Degrees Celsius