Table 2 Number of model training and test points, model results, and variable performance for MAX-ENT models of fire-climate suitability for three south central US vegetation communities. AUC = area under the receiver operating characteristic curve, SD = standard deviation, ETSS = equal test sensitivity and specificity, ppt = precipitation, T min = minimum temperature, T max = maximum temperature.
From: Fire and Climate Suitability for Woody Vegetation Communities in the South Central United States
| Â | Oak | Mesquite | Pinyon-juniper |
|---|---|---|---|
Community occurrence points | |||
Training points (n) | 688 | 1868 | 1570 |
Test points (n) | 294 | 800 | 672 |
Overall model results | |||
Training AUC | 0.9873 | 0.9726 | 0.9311 |
Test AUC | 0.9839 | 0.9696 | 0.9267 |
AUC SD | 0.0019 | 0.0016 | 0.0035 |
ETSS logistic threshold | 0.1344 | 0.2487 | 0.3306 |
Performance of individual variables | |||
Permutation importance (%) | |||
Annual ppt (cm) | 58.1895 | 58.7840 | 68.0197 |
January T min (°C) | 8.0502 | 22.8078 | 19.8425 |
July T max (°C) | 14.8504 | 12.5358 | 5.6574 |
Fire probability | 18.9098 | 5.8723 | 6.4803 |
Test AUC without variable | |||
Annual ppt (cm) | 0.9782 | 0.9582 | 0.8667 |
January T min (°C) | 0.9829 | 0.9638 | 0.9100 |
July T max (°C) | 0.9824 | 0.9630 | 0.9204 |
Fire probability | 0.9836 | 0.9682 | 0.9231 |
Test AUC with only variable | |||
Annual ppt (cm) | 0.8856 | 0.8007 | 0.8605 |
January T min (°C) | 0.8528 | 0.8740 | 0.7818 |
July T max (°C) | 0.9458 | 0.9295 | 0.7126 |
Fire probability | 0.9485 | 0.7160 | 0.7397 |