Table 2.
The 24 most influential variables as determined by the boosted regression tree model, shown in order of relative influence.
| Predictor | Description | Relative influence (%) |
|---|---|---|
| DFR | Distance from roost | 13.99 |
| ECARR_3mo | Change in ECARR over 3 months | 5.85 |
| AVGtmn_1mo | Average minimum temperature of preceding month | 5.12 |
| ANOMtmn_1mo | Cumulative minimum temperature anomaly over preceding month | 4.23 |
| EWDI1 | Eucalypt Wetness Difference Index 1 | 4.20 |
| ECBRR_6mo | Change in ECBRR over 6 months | 3.70 |
| PREC_1mo_6mo | Change in PREC_1mo over 6 months | 3.29 |
| EWDI1_3mo | Change in EWDI1 over 3 months | 3.08 |
| EWDI1_12mo | Change in EWDI1 over 12 months | 3.08 |
| PREC_9mo | Cumulative precipitation of the preceding 9 months | 2.99 |
| PREC_12mo | Cumulative precipitation of the preceding 12 months | 2.92 |
| EWDI2_1mo | Change in EWDI2 over 1 month | 2.70 |
| ECBRR_12mo | Change in ECBRR over 12 months | 2.63 |
| EWDI1_9mo | Change in EWDI1 over 9 months | 2.54 |
| ANOMtmx_9mo | Cumulative maximum temperature anomaly over preceding 9 months | 2.44 |
| ECARR_12mo | Change in ECARR over 12 months | 2.40 |
| ECBRR | Eucalypt Chlorophyll b Reflectance Ratio | 2.26 |
| ECBRR_9mo | Change in ECBRR over 9 months | 2.12 |
| EWDI2_6mo | Change in EWDI2 over 6 months | 2.10 |
| AVGtmx_1mo | Average maximum temperature of preceding month | 2.10 |
| PREC_1mo | Cumulative precipitation of the preceding month | 1.96 |
| ANOMtmn_3mo | Cumulative minimum temperature anomaly over preceding 3 months | 1.84 |
| PREC_1mo_12mo | Change in PREC_1mo over 12 months | 1.57 |
| ECARR_9mo | Change in ECARR over 9 months | 1.57 |
Predictors plotted in Fig. 3 are indicated in bold.