Table 3. Assessment of the best (lowest AIC criterion) general linear model (GLM) with Hierarchical Partitioning (HP) analysis applied to annual tree-ring width index for the period 1979–2017.
Asterisks in HP analysis dentote p<0.05.
| GLM analysis | All sites | Načetín | Kovářská | Fláje | ||||
|---|---|---|---|---|---|---|---|---|
| Predictors | Estimates | p value | Estimates | p value | Estimates | p value | Estimates | p value |
| SO2 concentration | -0.20 | <0.001 | -0.12 | <0.001 | -0.18 | <0.001 | -0.08 | 0.023 |
| PDSIV-VIII | -0.07 | 0.008 | -0.09 | 0.013 | -0.11 | 0.017 | ||
| Air temperatureV-VIII | 0.05 | 0.093 | 0.10 | 0.029 | ||||
| Soil BS | -0.05 | 0.082 | -4.30 | 0.007 | ||||
| Forest age | -0.09 | 0.004 | ||||||
| Forest age: PDSIV-VIII | 0.04 | 0.046 | ||||||
| Forest age:Soil BS | 0.08 | 0.031 | ||||||
| HP analysis | Z scorep value | Explained variance (%) | Z scorep value | Explained variance (%) | Z scorep value | Explained variance (%) | Z scorep value | Explained variance (%) |
| SO2 concentration | 20.9* | 57 | 6.7* | 56 | 10.4* | 65 | 3.73* | 48 |
| PDSIV-VIII | 2.29* | 8.2 | 1.7* | 19 | 4.0* | 52 | ||
| Air temperatureV-VIII | 7.67* | 24 | 5.5* | 35 | ||||
| Soil BS | 1.48 | 5.7 | 2.5* | 24 | ||||
| Forest age | 1.4 | 6.0 | ||||||