Table 1 Plot and site characteristics. The value in parentheses is the standard error
From: Genetic differentiation of European larch along an altitudinal gradient in the French Alps
Plot 2,300 m | Plot 2,000 m | Plot 1,700 m | Plot 1,350 m | |
|---|---|---|---|---|
Range of altitude (m) | 2,357–2,299 | 2,023–1,988 | 1,683–1,640 | 1,373–1,341 |
Mean annual temperature (°C) | 2.92 | 4.46 | 6.32 | 7.66 |
Mean temperature of the warmest month, July (°C) | 10.95 | 12.95 | 15.37 | 17.09 |
Mean temperature of the coldest month, January (°C) | −3.73 | −2.72 | −1.49 | −0.61 |
Average number of frosty days | 208 | 192 | 170 | 154 |
Soil type | Calcisol | Eutric Brunisol/Calcisol | Colluviosol | Regosol/Colluviosol |
Number of trees | 198 | 217 | 206 | 200 |
Plot size (m2) | 5,429 | 7,540 | 5,815 | 8,704 |
Plot density (no. trees/ha) | 365 | 288 | 354 | 230 |
Mean height (m) | 16.21 (±2.19) | 25.31 (±2.76) | 26.71 (±2.93) | 23.79 (±2.64) |
Mean breast height circumference (cm) | 79.3 (±27.4) | 98.6 (±32.8) | 105.1 (±34.4) | 107 (±25.4) |
Number of rings in the increment core (age estimation) | 95.7 (±34.1) | 134.0 (±48.8) | 133.2 (±46.1) | 143.7 (±15.5) |