Table 1 Percentage of variable contribution to the model construction, derived from the permutation importance analysis.
Variables | A. mongolicus | A. mongolica | H. songaricum | P. mongolica | T. mongolica |
|---|---|---|---|---|---|
Mean diurnal range (BIO2) | 0 | 6.8 | 6.5 | 0 | 6.2 |
Maximum temperature of warmest month (BIO5) | 6.3 | 3.1 | 0 | 2.9 | 9 |
Aridity index (AI) | 58.9 | 33.1 | 1.8 | 9.7 | 36.7 |
Aspect | 0 | 3.2 | 3.1 | 2.4 | 8.9 |
Compound topographic index (CTI) | 0.2 | 0 | 0 | 4.8 | 0.1 |
Growing degree days (GDD) | 0 | 14.3 | 0 | 0 | 6.2 |
Normalized Difference Vegetation Index (NDVI) | 0 | 7.3 | 3.4 | 45.7 | 10.3 |
Slope | 20.3 | 27.5 | 0 | 22.2 | 2.5 |
Nutrient availability (SQ1) | 14.2 | 0 | 67.5 | 0 | 7.8 |
Rooting conditions (SQ3) | 0 | 4.8 | 17.6 | 12.3 | 12.2 |
