Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Values of variance inflation factors (VIF) for variables used in models and for all variables
| Variable | VIF |
|---|---|
| Proportion of Scots pine in stand | 4.070 |
| Soil texture | 1.448 |
| Soil pH | 4.598 |
| Soil moisture in spring | 2.113 |
| Soil moisture in spring | 3.165 |
| Tree layer cover | 1.699 |
| Shrub layer cover | 3.042 |
| Herb layer cover | 5.000 |
| Moss layer cover | 1.211 |
Ash regeneration characteristics (ind_/25m2 study plot)
| No. | Plot | Density of ash <0.6 m | Density of ash 0.6–1.3 m | Hf damaged ind. <0.6 m | HF damaged ind. 0.6–1.3 m | Drought-damaged ind. <0.6 m | Drought-damaged ind.0.6–1.3 m | Browsed ind. <0.6 m | Browsed ind. 0.6–1.3 m |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1. | 1 | 24 | 2 | 1 | 2 | 0 | 0 | 6 | 2 |
| 2 | 15 | 1 | 0 | 1 | 1 | 0 | 3 | 1 | |
| 3 | 6 | 1 | 0 | 0 | 2 | 0 | 1 | 0 | |
| 4 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 2. | 5 | 17 | 0 | 2 | 0 | 1 | 0 | 4 | 0 |
| 6 | 11 | 1 | 0 | 0 | 1 | 0 | 2 | 0 | |
| 7 | 11 | 0 | 1 | 0 | 2 | 0 | 2 | 0 | |
| 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 3. | 9 | 22 | 3 | 3 | 1 | 0 | 0 | 5 | 2 |
| 10 | 9 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
| 11 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 4. | 13 | 56 | 10 | 8 | 4 | 9 | 0 | 20 | 8 |
| 14 | 36 | 6 | 4 | 3 | 6 | 0 | 10 | 6 | |
| 15 | 17 | 4 | 1 | 2 | 4 | 0 | 4 | 3 | |
| 16 | 13 | 4 | 0 | 1 | 3 | 0 | 3 | 3 | |
| 5. | 17 | 28 | 5 | 3 | 3 | 3 | 0 | 13 | 5 |
| 18 | 15 | 1 | 1 | 0 | 3 | 0 | 4 | 0 | |
| 19 | 11 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | |
| 20 | 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 6. | 21 | 36 | 3 | 5 | 1 | 3 | 0 | 16 | 3 |
| 22 | 29 | 0 | 2 | 0 | 3 | 0 | 12 | 0 | |
| 23 | 13 | 1 | 0 | 0 | 2 | 0 | 3 | 0 | |
| 24 | 7 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | |
| 7. | 25 | 17 | 0 | 2 | 0 | 1 | 0 | 5 | 0 |
| 26 | 13 | 0 | 1 | 0 | 1 | 0 | 2 | 0 | |
| 27 | 5 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 8. | 29 | 29 | 1 | 2 | 1 | 2 | 0 | 11 | 1 |
| 30 | 14 | 0 | 1 | 0 | 2 | 0 | 2 | 0 | |
| 31 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 32 | 5 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 9. | 33 | 35 | 3 | 5 | 2 | 0 | 0 | 9 | 3 |
| 34 | 12 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | |
| 35 | 9 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | |
| 36 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 10. | 37 | 14 | 0 | 0 | 0 | 1 | 0 | 2 | 0 |
| 38 | 8 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | |
| 39 | 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 40 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Models of ash saplings density (per 25 m2), estimated using Poisson generalized linear mixed-effects models
| Independent variable | Predictor | Estimate | SE | z value | Pr(>|z|) |
|---|---|---|---|---|---|
| Saplings <0.6 m height density per 25 m2 | (intercept) | −4.257 | 0.816 | −5.216 | <0.001 |
| AICc = 205.6, AICc0 = 480.9 | proportion of drought-damaged saplings | 1.269 | 0.587 | 2.161 | 0.031 |
| RE SD < 0.0001 | proportion of browsed saplings | 1.443 | 0.531 | 2.720 | 0.007 |
| soil pH | 1.293 | 0.155 | 8.346 | <2e-16 | |
| tree layer cover | 0.014 | 0.008 | 1.881 | 0.060 | |
| moss layer cover | −0.072 | 0.024 | −2.966 | 0.003 | |
| pine proportion | −0.018 | 0.010 | −1.730 | 0.084 | |
| Saplings 0.6–1.3 m height density per 25 m2 | (intercept) | −1.158 | 0.986 | −1.174 | <0.001 |
| AICc = 91.2, AICc0 = 119.7 | shrub layer cover | 0.091 | 0.031 | 2.927 | 0.003 |
| RE SD = 0.8554 | oine proportion | −0.018 | 0.010 | −1.730 | 0.084 |
Models of the proportion of damaged saplings estimated using zero-inflated Beta generalized linear mixed-effects models
| Independent variable | Predictor | Estimate | SE | z value | Pr(>|z|) |
|---|---|---|---|---|---|
| Proportion of disease-damaged saplings <0.6 m height (count) | (intercept) | −7.571 | 1.456 | −5.201 | <0.001 |
| AICc = −37.8, AICc0 = 10.5 | tree layer cover | 0.024 | 0.012 | 1.996 | 0.046 |
| RE SD = 0.0001 | soil pH | 0.790 | 0.235 | 3.363 | 0.001 |
| (zero-inflated) | (intercept) | 62.167 | 25.851 | 2.405 | 0.016 |
| RE SD = 0.011 | soil pH | −14.673 | 6.115 | −2.400 | 0.016 |
| Proportion of disease-damaged saplings 0.6–1.3 m height (count) | (intercept) | 2.010 | 0.613 | 3.000 | 0.001 |
| AICc = −42.4, AICc0 = 47.3 | soil pH | 0.825 | 0.000 | 157,341.000 | <0.001 |
| RE SD = 1.668 | summer soil moisture | −0.660 | 0.000 | −129,175.000 | <0.001 |
| herb layer cover | 0.021 | 0.000 | 88,930.000 | <0.001 | |
| moss layer cover | −1.123 | 0.000 | −546,917.000 | <0.001 | |
| (zero-inflated) RE SD = 1.016 | (intercept) | 1.157 | 0.594 | 1.948 | 0.051 |
| Proportion of drought-damaged saplings <0.6 m height (count) | (intercept) | −1.256 | 0.675 | −1.860 | 0.063 |
| AICc = −32.0, AICc0 = −11.4 | summer soil moisture | −0.205 | 0.091 | −2.264 | 0.024 |
| RE SD = 0.1037 | pine proportion | 0.011 | 0.004 | 3.061 | 0.002 |
| (zero-inflated) | (intercept) | 8.044 | 4.603 | 1.748 | 0.081 |
| RE SD = 1.414 | soil pH | −2.227 | 1.146 | −1.942 | 0.052 |
Study plots characteristics
| No. | Plot | Mature pine trees (%) | Mature ash trees (%) | Other trees in overstory (%) | Soil Reference Group | Soil texture | Summer groundwater (cm) | Summer soil moisture (%) | SOM (%) | Soil pH |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 1. | 1 | 40 | 20 | 40Qr | Ochric Dystric Cambisol | LS | 165 | 6.7 | 2.70 | 4.49 |
| 2 | 50 | 5 | 40Qr 5A | Ochric Dystric Cambisol | LS | >200 | 5.7 | 2.25 | 4.21 | |
| 3 | 80 | 0 | 20Qr | Ochric Brunic Arenosol | S | >200 | 4.2 | 1.69 | 3.70 | |
| 4 | 80 | 0 | 20Qr | Ochric Brunic Arenosol | S | >200 | 4.1 | 1.60 | 3.62 | |
| 2. | 5 | 20 | 20 | 50Qr 10B | Arenic Fluvic Cambisol | S | >200 | 6.1 | 2.68 | 4.50 |
| 6 | 50 | 5 | 30Qr 15B | Arenic Dystric Cambisol | S | >200 | 6.0 | 2.60 | 4.14 | |
| 7 | 50 | 0 | 30Qr 20B | Ochric Brunic Arenosol | S | >200 | 5.1 | 2.23 | 4.22 | |
| 8 | 90 | 0 | 10B | Ochric Brunic Arenosol | S | >200 | 3.6 | 1.41 | 3.38 | |
| 3. | 9 | 10 | 20 | 40A 30Qr | Colluvic Calcaric Cambisol | LS | 190 | 7.7 | 3.12 | 4.46 |
| 10 | 60 | 10 | 30Qr | Colluvic Dystric Cambisol | S | >200 | 7.1 | 2.16 | 4.09 | |
| 11 | 80 | 0 | 20Qr | Ochric Brunic Arenosol | S | >200 | 4.7 | 1.42 | 3.67 | |
| 12 | 90 | 0 | 10Qr | Ochric Brunic Arenosol | S | >200 | 4.4 | 1.25 | 3.46 | |
| 4. | 13 | 50 | 40 | 10Qr | Arenic Calcaric Cambisol | S | >200 | 5.4 | 3.45 | 5.19 |
| 14 | 50 | 20 | 30Qr | Arenic Calcaric Cambisol | S | >200 | 5.4 | 3.19 | 4.58 | |
| 15 | 60 | 0 | 30Qr 10T | Ochric Brunic Arenosol | S | >200 | 4.9 | 2.27 | 4.31 | |
| 16 | 60 | 0 | 30Qr 10T | Ochric Brunic Arenosol | S | >200 | 4.8 | 2.34 | 4.26 | |
| 5. | 17 | 20 | 20 | 50Qr 10B | Arenic Calcaric Cambisol | S | >200 | 8.7 | 2.33 | 4.79 |
| 18 | 60 | 5 | 30Qr 5B | Ochric Brunic Arenosol | S | >200 | 5.6 | 2.25 | 4.12 | |
| 19 | 70 | 0 | 20Qr 10T | Ochric Brunic Arenosol | S | >200 | 5.5 | 2.03 | 4.02 | |
| 20 | 90 | 0 | 10Qr | Ochric Brunic Arenosol | S | >200 | 4.8 | 1.88 | 3.68 | |
| 6. | 21 | 30 | 20 | 40Qr 10A | Ochric Brunic Arenosol | S | >200 | 8.3 | 3.08 | 4.60 |
| 22 | 60 | 10 | 30Qr | Ochric Brunic Arenosol | S | >200 | 8.3 | 2.98 | 4.45 | |
| 23 | 70 | 0 | 30Qr | Ochric Brunic Arenosol | S | >200 | 5.5 | 1.90 | 4.00 | |
| 24 | 90 | 0 | 10Qr | Ochric Brunic Arenosol | S | >200 | 5.2 | 1.54 | 3.81 | |
| 7. | 25 | 10 | 10 | 30A 30L 20T | Colluvic Dystric Cambisol | S | >200 | 8.0 | 2.32 | 4.51 |
| 26 | 60 | 5 | 20L 10A 5Qr | Colluvic Dystric Cambisol | S | >200 | 5.5 | 1.90 | 4.29 | |
| 27 | 90 | 0 | 10Qr | Ochric Brunic Arenosol | S | >200 | 5.0 | 1.84 | 3.80 | |
| 28 | 90 | 0 | 10Qr | Ochric Brunic Arenosol | S | >200 | 4.9 | 1.20 | 3.40 | |
| 8. | 29 | 20 | 10 | 40A 30C | Colluvic Dystric Cambisol | S | >200 | 5.7 | 2.66 | 4.68 |
| 30 | 60 | 5 | 20Qr 15A | Colluvic Dystric Cambisol | S | >200 | 5.6 | 2.18 | 4.21 | |
| 31 | 80 | 0 | 10Qr 10B | Ochric Brunic Arenosol | S | >200 | 4.0 | 2.17 | 3.90 | |
| 32 | 80 | 0 | 10Qr 10B | Ochric Brunic Arenosol | S | >200 | 4.4 | 2.01 | 3.86 | |
| 9. | 33 | 10 | 30 | 40Qr 20A | Arenic Dystric Cambisol | S | 169 | 8.3 | 3.18 | 5.03 |
| 34 | 60 | 5 | 20Qr 15A | Ochric Brunic Arenosol | S | 185 | 7.2 | 2.29 | 4.24 | |
| 35 | 80 | 0 | 20Qr | Ochric Brunic Arenosol | S | 185 | 7.1 | 1.70 | 4.11 | |
| 36 | 90 | 0 | 10Qr | Ochric Brunic Arenosol | S | >200 | 6.9 | 1.70 | 3.60 | |
| 10. | 37 | 10 | 10 | 50B 30Qp | Ochric Brunic Arenosol | S | >200 | 6.3 | 2.33 | 4.28 |
| 38 | 60 | 5 | 20Qp 15B | Ochric Brunic Arenosol | S | >200 | 5.1 | 1.90 | 4.04 | |
| 39 | 90 | 0 | 10Qp | Ochric Brunic Arenosol | S | >200 | 4.9 | 1,77 | 3.59 | |
| 40 | 90 | 0 | 10Qp | Ochric Brunic Arenosol | S | >200 | 5.0 | 1,72 | 3.40 |
Correlation matrix of studied variables, values of |r|>0_7 bolded
| Variable | Ash proportion | Pine proportion | SOM | soil pH | litter pH | soil N | SOC | C:N ratio | soil Ca | soil K | soil Na | spring moisture | summer moisture | canopy cover | shrub cover | herb cover | moss cover | <0.6 m saplings density | 0.6–1.3 m saplings density | <0.6 m saplings browsed proportion | 0.6–1.3 m saplings browsed proportion | <0.6 m saplings damaged proportion | 0.6–1.3 m saplings damaged proportion | <0.6 m saplings drought damaged proportion |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ash proportion | 1.00 | −0.72 | 0.84 | 0.84 | 0.86 | 0.71 | 0.41 | −0.60 | 0.79 | 0.56 | −0.41 | 0.30 | 0.56 | 0.17 | 0.65 | 0.72 | −0.28 | 0.89 | 0.71 | 0.68 | 0.64 | 0.82 | 0.52 | −0.18 |
| Pine proportion | −0.72 | 1.00 | −0.75 | −0.83 | −0.88 | −0.58 | −0.19 | 0.71 | −0.70 | −0.39 | 0.64 | −0.30 | −0.67 | −0.13 | −0.55 | −0.84 | 0.45 | −0.68 | −0.37 | −0.74 | −0.56 | −0.74 | −0.52 | 0.19 |
| SOM | 0.84 | −0.75 | 1.00 | 0.89 | 0.79 | 0.85 | 0.49 | −0.76 | 0.88 | 0.63 | −0.64 | 0.37 | 0.57 | 0.17 | 0.68 | 0.78 | −0.39 | 0.90 | 0.64 | 0.77 | 0.65 | 0.77 | 0.53 | 0.02 |
| soil pH | 0.84 | −0.83 | 0.89 | 1.00 | 0.89 | 0.77 | 0.32 | −0.82 | 0.95 | 0.70 | −0.68 | 0.36 | 0.63 | 0.15 | 0.70 | 0.83 | −0.53 | 0.92 | 0.65 | 0.86 | 0.68 | 0.80 | 0.59 | 0.02 |
| litter pH | 0.86 | −0.88 | 0.79 | 0.89 | 1.00 | 0.67 | 0.35 | −0.69 | 0.78 | 0.52 | −0.54 | 0.41 | 0.66 | 0.20 | 0.63 | 0.77 | −0.46 | 0.82 | 0.51 | 0.79 | 0.65 | 0.84 | 0.60 | −0.20 |
| soil N | 0.71 | −0.58 | 0.85 | 0.77 | 0.67 | 1.00 | 0.74 | −0.77 | 0.84 | 0.63 | −0.44 | 0.38 | 0.44 | 0.12 | 0.62 | 0.66 | −0.45 | 0.87 | 0.64 | 0.80 | 0.63 | 0.66 | 0.51 | 0.06 |
| SOC | 0.41 | −0.19 | 0.49 | 0.32 | 0.35 | 0.74 | 1.00 | −0.19 | 0.40 | 0.32 | −0.07 | 0.28 | 0.21 | 0.16 | 0.38 | 0.23 | −0.22 | 0.51 | 0.34 | 0.41 | 0.35 | 0.36 | 0.28 | −0.06 |
| C:N ratio | −0.60 | 0.71 | −0.76 | −0.82 | −0.69 | −0.77 | −0.19 | 1.00 | −0.87 | −0.62 | 0.64 | −0.41 | −0.52 | 0.01 | −0.55 | −0.77 | 0.60 | −0.75 | −0.51 | −0.82 | −0.54 | −0.60 | −0.47 | −0.13 |
| soil Ca | 0.79 | −0.70 | 0.88 | 0.95 | 0.78 | 0.84 | 0.40 | −0.87 | 1.00 | 0.74 | −0.63 | 0.41 | 0.57 | 0.12 | 0.66 | 0.77 | −0.53 | 0.94 | 0.70 | 0.87 | 0.66 | 0.73 | 0.55 | 0.16 |
| soil K | 0.56 | −0.39 | 0.63 | 0.70 | 0.52 | 0.63 | 0.32 | −0.62 | 0.74 | 1.00 | −0.50 | 0.34 | 0.27 | 0.12 | 0.39 | 0.43 | −0.34 | 0.72 | 0.65 | 0.58 | 0.57 | 0.48 | 0.55 | 0.24 |
| soil Na | −0.41 | 0.64 | −0.64 | −0.68 | −0.54 | −0.44 | −0.07 | 0.64 | −0.63 | −0.50 | 1.00 | −0.19 | −0.37 | 0.14 | −0.48 | −0.64 | 0.48 | −0.48 | −0.17 | −0.56 | −0.28 | −0.42 | −0.31 | −0.11 |
| spring moisture | 0.30 | −0.30 | 0.37 | 0.36 | 0.41 | 0.38 | 0.28 | −0.41 | 0.41 | 0.34 | −0.19 | 1.00 | 0.52 | 0.29 | 0.10 | 0.28 | −0.24 | 0.36 | 0.15 | 0.39 | 0.39 | 0.26 | 0.43 | −0.06 |
| summer moisture | 0.56 | −0.67 | 0.57 | 0.63 | 0.66 | 0.44 | 0.21 | −0.52 | 0.57 | 0.27 | −0.37 | 0.52 | 1.00 | 0.44 | 0.34 | 0.63 | −0.23 | 0.54 | 0.20 | 0.65 | 0.36 | 0.55 | 0.29 | −0.29 |
| canopy cover | 0.17 | −0.13 | 0.17 | 0.15 | 0.20 | 0.12 | 0.16 | 0.01 | 0.12 | 0.12 | 0.14 | 0.29 | 0.44 | 1.00 | −0.14 | −0.05 | 0.31 | 0.20 | 0.15 | 0.18 | 0.19 | 0.30 | 0.10 | −0.04 |
| shrub cover | 0.65 | −0.55 | 0.68 | 0.70 | 0.63 | 0.62 | 0.38 | −0.55 | 0.66 | 0.39 | −0.48 | 0.10 | 0.34 | −0.14 | 1.00 | 0.61 | −0.51 | 0.68 | 0.57 | 0.67 | 0.55 | 0.61 | 0.42 | −0.01 |
| herb cover | 0.72 | −0.84 | 0.78 | 0.83 | 0.77 | 0.66 | 0.23 | −0.77 | 0.77 | 0.43 | −0.64 | 0.28 | 0.63 | −0.05 | 0.61 | 1.00 | −0.49 | 0.72 | 0.38 | 0.77 | 0.46 | 0.69 | 0.39 | −0.14 |
| moss cover | −0.28 | 0.45 | −0.39 | −0.53 | −0.46 | −0.45 | −0.22 | 0.60 | −0.53 | −0.34 | 0.48 | −0.24 | −0.23 | 0.31 | −0.51 | −0.49 | 1.00 | −0.38 | −0.21 | −0.46 | −0.23 | −0.29 | −0.22 | −0.09 |
| <0.6 m saplings density | 0.89 | −0.68 | 0.90 | 0.92 | 0.82 | 0.87 | 0.51 | −0.75 | 0.94 | 0.72 | −0.48 | 0.36 | 0.54 | 0.20 | 0.68 | 0.72 | −0.38 | 1.00 | 0.79 | 0.85 | 0.74 | 0.81 | 0.60 | 0.06 |
| 0.6–1.3 m saplings density | 0.71 | −0.37 | 0.64 | 0.65 | 0.51 | 0.64 | 0.34 | −0.51 | 0.70 | 0.65 | −0.17 | 0.15 | 0.20 | 0.15 | 0.57 | 0.38 | −0.21 | 0.79 | 1.00 | 0.58 | 0.73 | 0.57 | 0.52 | 0.17 |
| <0.6 m saplings browsed proportion | 0.68 | −0.74 | 0.77 | 0.86 | 0.79 | 0.80 | 0.41 | −0.82 | 0.87 | 0.58 | −0.56 | 0.39 | 0.65 | 0.18 | 0.67 | 0.77 | −0.46 | 0.85 | 0.58 | 1.00 | 0.65 | 0.73 | 0.55 | 0.12 |
| 0.6–1.3 m saplings browsed proportion | 0.64 | −0.56 | 0.65 | 0.68 | 0.65 | 0.63 | 0.35 | −0.54 | 0.66 | 0.57 | −0.28 | 0.39 | 0.36 | 0.19 | 0.55 | 0.46 | −0.23 | 0.74 | 0.73 | 0.65 | 1.00 | 0.55 | 0.92 | −0.02 |
| <0.6 m saplings damaged proportion | 0.82 | −0.74 | 0.77 | 0.80 | 0.84 | 0.66 | 0.36 | −0.60 | 0.73 | 0.48 | −0.42 | 0.26 | 0.55 | 0.30 | 0.61 | 0.69 | −0.29 | 0.81 | 0.57 | 0.73 | 0.55 | 1.00 | 0.40 | −0.04 |
| 0.6–1.3 m saplings damaged proportion | 0.52 | −0.52 | 0.53 | 0.59 | 0.60 | 0.51 | 0.28 | −0.47 | 0.55 | 0.55 | −0.31 | 0.43 | 0.29 | 0.10 | 0.42 | 0.39 | −0.22 | 0.60 | 0.52 | 0.55 | 0.92 | 0.40 | 1.00 | −0.10 |
| <0.6 m saplings drought damaged proportion | −0.18 | 0.19 | 0.02 | 0.02 | −0.20 | 0.06 | −0.06 | −0.13 | 0.16 | 0.24 | −0.11 | −0.06 | −0.29 | −0.04 | −0.01 | −0.14 | −0.09 | 0.06 | 0.17 | 0.12 | −0.02 | −0.04 | −0.10 | 1.00 |
Models of the proportion of browsed saplings estimated using zero-inflated Beta generalized linear mixed-effects models
| Independent variable | Predictor | Estimate | SE | z value | Pr(>|z|) |
|---|---|---|---|---|---|
| Proportion of browsed saplings <0.6 m height (count) | (intercept) | −4.526 | 1.490 | −3.038 | 0.002 |
| AICc = −46.3, AICc0 = 6.9 | shrub layer cover | 0.016 | 0.013 | 1.286 | 0.198 |
| RE SD = 0.2340 | soil pH | 0.742 | 0.337 | 2.200 | 0.028 |
| pine proportion | −0.005 | 0.004 | −1.208 | 0.227 | |
| (zero-inflated) | (intercept) | 825.000 | 454.600 | 1.815 | 0.070 |
| RE SD = 150.6 | pH | −208.500 | 114.900 | −1.814 | 0.070 |
| Proportion of browsed saplings 0.6–1.3 m height (count) | (intercept) | −1.680 | 1.097 | −1.531 | 0.126 |
| AICc = −5.7; AICc0 = 25.0 | moss layer cover | −1.526 | 0.426 | −3.584 | <0.001 |
| RE SD < 0.0001 | summer soil moisture | 0.823 | 0.211 | 3.892 | <0.001 |
| (zero-inflated) | (intercept) | 337.120 | 292.560 | 1.152 | 0.249 |
| RE SD = 30.35 | pH | −76.870 | 67.800 | −1.134 | 0.257 |