Table 4. The eight environmental variables (abbreviations in parentheses) used in this study, their contributions in discriminant function analysis (DFA) in pairwise comparisons of three ecotypes, and their similarities assessed based on Schoener’s D and Warren’s I index.

Environmental variables	Py-eco1 vs. Py-eco2	Py-eco1 vs. Py-eco3	Py-eco2 vs. Py-eco3
Isothermality (bio3)	0.17	0.55	−0.83
Temperature seasonality (bio4)	−0.06	−0.27	0.41
Maximum temperature of warmest month (bio5)	−0.06	−0.21	0.28
Annual precipitation (bio12)	0.45	0.01	0.43
Precipation seasonality (bio15)	−0.44	<0.01	−0.35
Soil organic carbon (SC)	−0.15	0.05	−0.27
Soil pH (SpH)	0.38	0.22	−0.19
Wet day frequency (WET)	0.81	0.29	0.02
Pairwise comparision
DFA (Wilks’s λ)	0.21**	0.04**	0.21**
Schoener’s D	0.42	0.21	0.25
Warren’s I	0.73	0.37	0.45

Values corresponding to the three most significant variables are in boldface.

^** P<0.01.