Table 1.
Percent contribution and permutation importance of environmental variables to the potential geographical distribution of Lolium temulentum.
| Variable | Description | Unit | Percent contribution | Permutation importance |
|---|---|---|---|---|
| bio2 | Mean diurnal temperature range | °C | 44.3 | 71.2 |
| bio7 | Temperature annual range | °C | 26.1 | 4.3 |
| bio11 | Mean temperature of coldest quarter | °C | 16.7 | 7.6 |
| bio12 | Annual precipitation | mm | 8.2 | 10.1 |
| bio15 | Precipitation seasonality (coefficient of variation × 1) | – | 1 | 2.1 |
| bio17 | Precipitation of driest quarter | mm | 0.8 | 0.5 |
| bio19 | Precipitation of coldest quarter | mm | 0.8 | 1.6 |
| Altitude | Altitude | m | 0.8 | 0.5 |
| Slope | Slope | 0.6 | 0.7 | |
| ADD_PROP | Other properties (gelic, vertic, petric) | 0.5 | 0.4 | |
| T_OC | Topsoil Organic Carbon | % wt | 0.3 | 0.9 |
| T_PH_H2O | Topsoil pH (H2O) | -log(H+) | 0.1 | 0.1 |
| T_SAND | Topsoil Sand Fraction | % wt | 0.1 | 0.1 |