Table 1.
Environmental variables used in the ENM and their sources
| Variables | Source |
|---|---|
| Annual cumulative precipitation | WorldClim [29] |
| Maximum temperature | |
| Mean temperature | |
| Minimum temperature | |
| Mean temperature of the coldest quarter | |
| Mean temperature of the warmest quarter | |
| Precipitation of the driest quarter | |
| Precipitation of the wettest quarter | |
| Potential evapo-transpiration (PET) | CGIAR-CSI [30] |
| Aridity index | |
| Elevation | SRTM [31] |
| Slope | Derived from elevation |
| Flow accumulation | Derived from slope |
| Distance to permanent rivers | Digital Global Chart [34] |
| Distance to nearest water bodies | Global Database of Lakes, Reservoirs and Wetlands [33] |
| Land surface temperature (LST) | AfSIS [35] |
| Enhanced vegetation index (EVI) | |
| Sand, silt, clay fractions | ISRIC [37] |
| Soil pH | |
| Major land cover (forest, agriculture, shrubland-grassland) | Arino et al [36] |
| Wetness index | Derived from slope and flow accumulation |
| Distance to stable lights 2006 | Elvidge et al. [38] |