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R-squared and Stone-Geyser’s Q 2 test values for the partial least squares regression (PLSR) analysis. Each model results from the combination between the two time-periods of contrasted vegetation productivity, and mange severity categories. A component is considered significant if Q 2 ≥ 0.0975
| Period | Severity | R 2 (%) | Q 2 |
|---|---|---|---|
| Green | Healthy | 25.14 | 0.14 |
| Mildly infested | 3.37 | 0.01 | |
| Severely infested | 0.2 | −0.02 | |
| Dormant | Healthy | 16.86 | 0.11 |
| Mildly infested | 8.43 | 0.06 | |
| Severely infested | 0.01 | −0.02 |
