Table 2. Environmental variables used for Eco-Linguistic Niche Modeling.
Climatic variables obtained from the WorldClim model [74]; topographic variables are derived from the altimetric model ETOPO1 [75].
| code | Description |
|---|---|
| bio1 | Annual Mean Temperature |
| bio2 | Mean Diurnal Range Temperature |
| bio3 | Isothermality |
| bio4 | Temperature Seasonality |
| bio5 | Max Temperature of Warmest Month |
| bio6 | Min Temperature of Coldest Month |
| bio7 | Temperature Annual Range |
| bio8 | Mean Temperature of Wettest Quarter |
| bio9 | Mean Temperature of Driest Quarter |
| bio10 | Mean Temperature of Warmest Quarter |
| bio11 | Mean Temperature of Coldest Quarter |
| bio12 | Annual Precipitation |
| bio13 | Precipitation of Wettest Month |
| bio14 | Precipitation of Driest Month |
| bio15 | Precipitation Seasonality |
| bio16 | Precipitation of Wettest Quarter |
| bio17 | Precipitation of Driest Quarter |
| bio18 | Precipitation of Warmest Quarter |
| bio19 | Precipitation of Coldest Quarter |
| Aspect | Azimuth that slopes are facing |
| DEM | Altitude in meters |
| Flowdir | Flow Direction of Water |
| Slope | Slope in degrees |
| TPI | Topographic Position Index |
| TRI | Terrain Ruggedness Index |
| Roughness | Eight surrounding Cells Altitude Difference |