Table 1 Geographical setting and stand characteristics
Study sites | ||||||
|---|---|---|---|---|---|---|
220 | 221 | 222 | 223 | 224 | 225 | |
Latitude/longitude | 47° 58′N/8° 53′E | 48° 26′N/8° 14′E | 47° 44′N/7° 58′E | 47° 44′N/8° 1′E | 48° 56′N/9° 34′E | 48° 46′N/8° 26′E |
Elevation class (m a.s.l.) | Medium (830) | Medium (720) | High (1020) | High (1020) | Low (520) | Low (700) |
Parental material | Limestone | Sandstone | Gneiss | Granite | Sandstone | Sandstone |
Slope*, aspect | Flat | Steep, south | Moderate, south | Moderate, northeast | Moderate, south | Moderate, northwest |
Annual rainfall (mm; 1979–2016) | 944 | 1762 | 2022 | 1851 | 1151 | 1555 |
Mean annual temperature (°C; 1979–2016) | 7.4 | 7.1 | 5.5 | 6 | 8.3 | 7.5 |
Average age (A. alba, P. abies) | 103, 91 | 120, 126 | 95, 92 | 116, 107 | 108, 103 | 98, 91 |
Mean annual increment (m3 ha-1 yr-1; A. alba, P. abies) | 12.5, 11 | 7, 6 | 12, 10 | 7, 10 | 11, 9 | 11, 10 |
Pre-treatment volume (m3 ha-1) | 598 − 707 | 524 − 602 | 460 − 580 | 452 − 625 | 468 − 656 | 463 − 578 |
Species volume mixture (%) at installation; A. alba, N. spruce, F. sylvatica | 79, 17, 4 | 38, 62, -- | 60, 24, 16 | 33, 47, 20 | 42, 58, -- | 52, 46, 2 |