3.3 Contribution of environmental variables
The Jackknife analyses results showed that the variables with high
contribution to the model were Bio9, Bio14, and POP, with a total
contribution of 70.8%. Among them, the contribution rate of Bio9 is
38.4%, that of Bio14 and POP is 16.2%, detailed analysis results are
shown in the Table S5. Meanwhile, the range, mean value and optimal
range of each variable (the probability of species
existence>0.5) is shown in Table S6 and Fig.3. For
variables with higher contribution (Bio9, Bio14, POP), there were
significant differences in the mean values between the locations of
occurrence and absence.