Table 3.
Multiple regression for different morphological leaf traits against minimum annual temperature and other climatic and soil factors. Model selection was conducted based on Akaike's information criteria. Abbreviations as in Table 2.
| Independent variables | R2 | F | Intercept | Slope | P | Independent variables | R2 | F | Intercept | Slope | P |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LT (μm) | LMA (g m−2) | ||||||||||
| Q. suber C (n = 49) | |||||||||||
| Min T (°C) | 0.82 | 58 | 274 | −4.18 | <0.0001 | Min T (°C) | 0.62 | 62 | 391 | −5.94 | <0.0001 |
| Soil N (%) | −198 | 0.00142 | |||||||||
| Q. ilex C (n = 75) | |||||||||||
| Min T (°C) | 0.62 | 60 | 257 | −5.47 | <0.0001 | Min T (°C) | 0.80 | 46 | −146 | −4.77 | <0.0001 |
| SR (W m−2) | 1.78 | 0.02 | |||||||||
| Soil N (%) | 84 | 0.05 | |||||||||
| Q. ilex C + 1 (n = 107) | |||||||||||
| Min T (°C) | 0.85 | 100 | −31 | −5.93 | <0.0001 | Min T (°C) | 0.62 | 92 | 218 | −2.95 | <0.0001 |
| Soil N (%) | 92 | 0.02 | |||||||||
| SR (W m−2) | 1.520 | 0.03 | |||||||||
| P. pinaster C (n = 56) | |||||||||||
| Min T (°C) | 0.45 | 22 | 881 | −14.13 | <0.0001 | Min T (°C) | 0.52 | 28 | 347 | −3.31 | <0.0001 |
| P. pinaster C + 1 (n = 78) | |||||||||||
| Min T (°C) | 0.57 | 25 | 950 | −15.68 | <0.0001 | Min T (°C) | 0.35 | 21 | 379 | −3.93 | <0.0001 |
| Soil P (p.p.m.) | −7.44 | 0.18 | |||||||||
| P. pinaster C + 2 (n = 78) | |||||||||||
| Min T (°C) | 0.36 | 21 | 936 | −14.50 | <0.0001 | Min T (°C) | 0.62 | 62 | 391 | −5.94 | <0.0001 |