Table 1.
Stand characteristics (mean ± standard error from four measurement points)
| BetulaOld | BetulaOldMixed | BetulaYoung | Picea | Quercus | |
|---|---|---|---|---|---|
| Tree basal area | 34.3 ± 1.70 | 23.0 ± 1.80 | 21.8 ± 1.10 | 39.0 ± 2.30 | 21.5 ± 0.60 |
| Tree density | 1,200 ± 115.5 | 900 ± 100.0 | 1,550 ± 150.0 | 750 ± 95.7 | 400 ± 141.4 |
| PAI 2015‐04‐25 | 1.1 ± 0.10 | 1.3 ± 0.10 | 1.2 ± 0.04 | 3.9 ± 0.10 | 1.1 ± 0.20 |
| PAI 2015‐05‐22 | 1.4 ± 0.02 | 2.2 ± 0.10 | 2.6 ± 0.10 | 4.0 ± 0.10 | 1.2 ± 0.03 |
| PAI 2015‐06‐05 | 2.4 ± 0.10 | 3.5 ± 0.05 | 3.6 ± 0.20 | 4.0 ± 0.10 | 2.7 ± 0.10 |
Tree basal area (per m2/ha) and density (per ha) were recorded in April 2015, and plant area index (PAI, per m2/m2) was estimated from hemispherical photographs corresponding to each measurement date.