Table 1.
Mean foliar and soil traits by sampling regions, and the effect of aspen genotype on foliar and soil traits after correcting for spatial autocorrelation. (Mean ± s.e. All traits were influenced by region at p < 0.01 unless indicated by ‘n.s.’ All genet effects p < 0.001).
| traits | Great Lakes | Western US | genet effect |
|---|---|---|---|
| Tree | |||
| leaf tannin (%) | 13.69 ± 0.40 | 5.00 ± 0.21 | F78,627 = 30.8 |
| diameter at breast height (cm) | 13.97 ± 0.49 | 24.20 ± 0.41 | F78,627 = 7.60 |
| leaf N (%) | 2.40 ± 0.02 | 2.39 ± 0.02 n.s. | F78,627 = 22.29 |
| leaf C (%) | 49.48 ± 0.18 | 49.00 ± 0.07 | F78,627 = 4.26 |
| leaf lignin (%) | 5.79 ± 0.16 | 7.04 ± 0.14 | F78,627 = 15.67 |
| soil | |||
| soil N (%) | 0.25 ± 0.01 | 0.64 ± 0.02 | F78,623 = 28.13 |
| soil C (%) | 4.32 ± 0.22 | 10.00 ± 0.37 | F78,623 = 15.90 |
| NH4–N (µg g−1 dry soil) | 8.26 ± 0.5 | 16.77 ± 0.96 | F78,626 = 14.75 |
| NO3–N (µg g−1 dry soil) | 0.04 ± 0.01 | 1.52 ± 0.05 | F48,506 = 11.83 |
| β-glucosidase (µmol h−1 g−1 soil) | 107.46 ± 3.77 | 240.27 ± 8.95 | F78,626 = 32.40 |
| cellobiohydrolase (μmol h−1 g−1 soil) | 106.6 ± 4.67 | 109.44 ± 3.16 n.s. | F78,626 = 18.93 |
| leucine aminopeptidase (μmol h−1 g soil) | 115.31 ± 4.04 | 180.98 ± 6.19 | F78,626 = 24.43 |
| urease (μmol h−1 g−1 soil) | 3.78 ± 0.21 | 8.45 ± 0.55 | F78,622 = 23.53 |
| peroxidase (μmol h−1 g−1 soil) | 0.38 ± 0.02 | 0.21 ± 0.01 | F78,626 = 16.30 |
| phenol oxidase (μmol h−1 g soil) | 0.21 ± 0.01 | 0.06 ± 0.01 | F78,555 = 12.19 |