Table 2.
Predictor weights and loads for the first component of partial least squares regression (PLSR) analysis. The contribution of each environmental predictor to the PLSR’s axis X is represented by the predictor weights
| Period | Severity | Predictors | Loads | Weights |
|---|---|---|---|---|
| Green | Healthy | NDVI | 0.68 | 0.62 |
| Snow | −0.71 | −0.77 | ||
| Abundance | −0.35 | −0.04 | ||
| Mildly infested | NDVI | −0.66 | −0.66 | |
| Snow | 0.55 | 0.25 | ||
| Abundance | 0.60 | 0.70 | ||
| Severely infested | NDVI | 0.67 | 0.59 | |
| Snow | −0.65 | 0.75 | ||
| Abundance | −0.38 | 0.38 | ||
| Dormant | Healthy | NDVI | 0.59 | 0.55 |
| Snow | −0.52 | −0.62 | ||
| Abundance | −0.62 | −0.57 | ||
| Mildly infested | NDVI | −0.39 | −0.29 | |
| Snow | 0.91 | 0.96 | ||
| Abundance | 0.66 | 0.02 | ||
| Severely infested | NDVI | −0.62 | −0.61 | |
| Snow | 0.42 | 0.36 | ||
| Abundance | 0.67 | 0.70 |