Table 3.
Environment variables driving MaxEnt.
| Symbol | Environmental Factors | Unit | Symbol | Environmental Factors | Unit |
|---|---|---|---|---|---|
| Bio1 | Annual mean temperature | °C | Bio19 | Precipitation of coldest quarter | mm |
| Bio2 | Mean diurnal range | °C | Elev | Elevation | m |
| Bio3 | Isothermality | \ | Aspect | Aspect | ° |
| Bio4 | Temperature seasonality | \ | Slope | Slope | ° |
| Bio5 | Max temperature of warmest month | °C | T_PH_H2O | Topsoil pH (H2O) | −log (H+) |
| Bio6 | Min temperature of coldest month | °C | T_GRAVEL | Topsoil gravel content | % |
| Bio7 | Temperature annual range | °C | T_SILT | Topsoil silt fraction | % |
| Bio8 | Mean temperature of wettest quarter | °C | T_CLAY | Topsoil clay fraction | % |
| Bio9 | Mean temperature of driest quarter | °C | T_SAND | Topsoil sand fraction | % |
| Bio10 | Mean temperature of warmest quarter | °C | T_OC | Topsoil organic carbon | % |
| Bio11 | Mean temperature of coldest quarter | °C | T_CEC_CLAY | Topsoil CEC (clay) | cmol/kg |
| Bio12 | Annual precipitation | mm | T_CEC_SOIL | Topsoil CEC (soil) | cmol/kg |
| Bio13 | Precipitation of wettest month | mm | T_BS | Topsoil base saturation | % |
| Bio14 | Precipitation of driest month | mm | T_TEB | Topsoil TEB | cmol/kg |
| Bio15 | Precipitation seasonality | \ | T_CACO3 | Topsoil calcium carbonate | % |
| Bio16 | Precipitation of wettest quarter | mm | T_CASO4 | Topsoil gypsum | % |
| Bio17 | Precipitation of driest quarter | mm | T_ESP | Topsoil sodicity (ESP) | % |
| Bio18 | Precipitation of warmest quarter | mm | T_ECE | Topsoil salinity (Elco) | dS/m |