Table 1 Percentage contributions and permutation importance of the variables included in the Maxent models for Rhamnus utilis
Code | Environmental Variables | Contribution% | Permutation importance |
|---|---|---|---|
VAPR01 | Water vapor pressure of January | 37.7 | 32.8 |
NDVI | Normalized difference of vegetation index | 27.3 | 25.5 |
BIO2 | Mean diurnal range | 15 | 11.7 |
BIO18 | Precipitation of warmest quarter | 4.5 | 10.3 |
SLOPE | Slope degree | 4.3 | 3.1 |
VAPR07 | Water vapor pressure of July | 2.4 | 2.2 |
ASPECT | Aspect | 1.8 | 1.6 |
ELEV | Elevation | 1.7 | 5.8 |
SRAD11 | Solar radiation of November | 1.2 | 1.5 |
BIO14 | Precipitation of driest month | 0.7 | 1.5 |
BIO3 | Isothermality | 0.7 | 0.6 |
CLAY | Soil clay percentage | 0.5 | 0.6 |
SAND | Soil sand percentage | 0.5 | 1 |
SRAD4 | Solar radiation of April | 0.5 | 0.1 |
BIO7 | Temperature annual range | 0.4 | 0.4 |
SRAD8 | Solar radiation of August | 0.4 | 1 |
SRAD9 | Solar radiation of September | 0.3 | 0.2 |
BUCK | Soil buck density | 0.2 | 0.2 |