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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

  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