Table 1.
Description and sources of environmental variables collected for the model
| Environmental variables | Abbreviation | Unit | Source |
|---|---|---|---|
| Annual mean temperature | BIO1 | °C | WorldClim |
| Mean diurnal range (mean of monthly (max temperature − min temperature)) | BIO2 | °C | WorldClim |
| Isothermality (BIO2/BIO7) (×100) | BIO3 | – | WorldClim |
| Temperature seasonality (standard deviation × 100) | BIO4 | °C | WorldClim |
| Max temperature of warmest month | BIO5 | °C | WorldClim |
| Min temperature of coldest month | BIO6 | °C | WorldClim |
| Temperature annual range (BIO5–BIO6) | BIO7 | °C | WorldClim |
| Mean temperature of wettest quarter | BIO8 | °C | WorldClim |
| Mean temperature of driest quarter | BIO9 | °C | WorldClim |
| Mean temperature of warmest quarter | BIO10 | °C | WorldClim |
| Mean temperature of coldest quarter | BIO11 | °C | WorldClim |
| Annual precipitation | BIO12 | mm | WorldClim |
| Precipitation of wettest month | BIO13 | mm | WorldClim |
| Precipitation of driest month | BIO14 | mm | WorldClim |
| Precipitation seasonality (coefficient of variation) | BIO15 | mm | WorldClim |
| Precipitation of wettest quarter | BIO16 | mm | WorldClim |
| Precipitation of driest quarter | BIO17 | mm | WorldClim |
| Precipitation of warmest quarter | BIO18 | mm | WorldClim |
| Precipitation of coldest quarter | BIO19 | mm | WorldClim |
| Elevation | Elevation | m | Derived from GTOPO30 |
| Slope | Slope | % | Derived from GTOPO30 |
| Aspect | Aspect | ° | Derived from GTOPO30 |
| Compound topographic index | CTI | – | Derived from GTOPO30 |
| Land cover | Land cover | – | European Space Agency |
Max = maximum; min = minimum.