Table 4 First column: Number of variables selected per species group and R2* for the full model. Following columns: Number of variables selected per variable group in the final model, and the relative decrease in R2* if this variable group is omitted from the model and fitted again
From: Species-specific, pan-European diameter increment models based on data of 2.3 million trees
| Â | Total | Forest structure | Weather | Climate | Soil | Deposition | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | N | R2* | N | R2* relative decrease | N | R2* relative decrease | N | R2* relative decrease | N | R2* relative decrease | N | R2* relative decrease |
Abies spp. | 19 | 0.29 | 2 | 32.3% | 5 | 6.2% | 7 | 3.3% | 3 | 2.8% | 2 | 0.7% |
Larix spp. | 11 | 0.28 | 2 | 60.7% | 4 | 29.9% | 2 | 2.0% | 1 | 1.2% | 2 | 3.3% |
Picea abies | 15 | 0.29 | 2 | 37.4% | 4 | 0.6% | 7 | 3.4% | 2 | 0.9% | 0 | 0.0% |
Picea sitchensis | 6 | 0.32 | 3 | 46.4% | 2 | 13.0% | 1 | 2.2% | 0 | 0.0% | 0 | 0.0% |
Pseudotsuga menziesii | 5 | 0.37 | 2 | 65.7% | 0 | 0.0% | 2 | 1.2% | 1 | 0.2% | 0 | 0.0% |
Pinus nigra + mugo | 13 | 0.33 | 2 | 28.3% | 5 | 15.9% | 3 | 3.7% | 2 | 1.4% | 1 | 0.3% |
Other indigenous pines | 19 | 0.26 | 3 | 32.2% | 6 | 12.5% | 3 | 3.5% | 5 | 6.2% | 2 | 1.1% |
Pinus sylvestris | 25 | 0.17 | 3 | 73.3% | 7 | 3.7% | 8 | 13.8% | 5 | 4.0% | 2 | 0.1% |
Other conifers | 13 | 0.53 | 2 | 16.5% | 7 | 12.2% | 3 | 3.9% | 0 | 0.0% | 1 | 3.0% |
Betula spp. | 15 | 0.27 | 3 | 27.1% | 6 | 1.9% | 4 | 2.8% | 2 | 2.0% | 0 | 0.0% |
Broadleaves longlived | 14 | 0.2 | 1 | 28.0% | 4 | 13.1% | 3 | 1.3% | 5 | 4.1% | 1 | 2.8% |
Broadleaves shortlived | 18 | 0.25 | 1 | 25.1% | 3 | 1.7% | 7 | 5.8% | 5 | 3.3% | 2 | 0.5% |
Castanea sativa | 10 | 0.13 | 3 | 76.5% | 2 | 5.2% | 2 | 16.1% | 2 | 5.1% | 1 | 6.7% |
Eucalyptus spp. | 8 | 0.51 | 3 | 17.4% | 3 | 23.5% | 1 | 1.2% | 1 | 0.9% | 0 | 0.0% |
Fagus sylvatica | 19 | 0.25 | 2 | 27.9% | 8 | 6.0% | 3 | 3.1% | 4 | 2.4% | 2 | 0.3% |
Populus plantations | 2 | 0.2 | 1 | 73.5% | 1 | 14.3% | 0 | 0.0% | 0 | 0.0% | 0 | 0.0% |
Quercus ilex | 8 | 0.1 | 2 | 47.4% | 2 | 8.0% | 2 | 3.6% | 1 | 1.3% | 1 | 6.3% |
Quercus robur + petraea | 13 | 0.17 | 3 | 51.2% | 2 | 1.8% | 3 | 2.6% | 4 | 5.4% | 1 | 0.4% |
Quercus suber | 5 | 0.1 | 2 | 42.5% | 0 | 0.0% | 1 | 2.7% | 1 | 2.5% | 1 | 1.6% |
Robinia pseudoacacia | 2 | 0.21 | 1 | 68.6% | 1 | 4.9% | 0 | 0.0% | 0 | 0.0% | 0 | 0.0% |