Table 1. Environmental variables used to build alternative models.
| Variable name | Variable description |
| Climate data set | |
| 1 mwintertmp | Mean winter temperature (°C) |
| 2 annpre | Annual precipitation (mm) |
| 3 acmgddaug | Accumulated degree days (January to August) |
| Vegetation data set | |
| Forest type | |
| 1 Bet.pen | Betula pendula |
| 2 Bet.pub | Betula pubescens |
| 3 Car.bet | Carpinus betulus |
| 4 Cor.ave | Corylus avellana |
| 5 Fag.syl | Fagus sylvatica |
| 6 Fra.exc | Fraxinus excelsior |
| 7 Pic.abi | Picea abies |
| 8 Pin.hal | Pinus halepensis |
| 9 Que.ile | Quercus ilex |
| 10 Que.pub | Quercus pubescens |
| 11 Que.rob | Quercus robur |
| 12 Til.cor | Tilia cordata |
| 13 Total.Forest | Sum of all the forest types |
| Shrubland type | |
| 14 MRS | Mediterranean Raingreen Shrub4 |
| 15 Jun.oxy | Juniperus oxycedrus |
| 16 Que.coc | Quercus coccifera |
| Grassland type | |
| 17 c3 | Herbaceous |
| Landscape data set | |
| 1 Forest.R30 | Accumulated forest in a radius of 30 km |
| 2 Shrub.R30 | Accumulated shrubland in a radius of 30 km |
| 3 Grass.R30 | Accumulated grassland in a radius of 30 km |