Table 1 Stand characteristics (planted or natural regeneration) and mean (± s.e.) tree age and path length (trunk height or branch length), diameter at breast height (DBH), specific leaf area (SLA = A l/leaf dry-weight), leaf area (A l), leaf area to sapwood area at tree or branch base (A l/A s) and leaf-specific conductivity (LSC)
Age class | Tree part | Season | Stand origin | Age (year) | DBH (cm) | Path length (m) | SLA (cm2 g−1) | Total A l (m2) | A l/A s (m2 cm−2) | LSC (10−3 kg m−1 s−1 MPa) |
|---|---|---|---|---|---|---|---|---|---|---|
Douglas-fir | ||||||||||
Mature | Bole | March | Nat. regen. | 103 ± 5 | 63.4 ± 2.4 | 43.7 ± 1.3 | 44.1 ± 2.1 | 352 ± 82 | 0.40 ± 0.07 | 1.42 ± 0.26 |
Mature | Bole | Sept. | Nat. regen. | 100 ± 2 | 60.7 + 1.6 | 43.6 + 1.1 | 63.0 ± 3.2 | 309 ± 41 | 0.44 + 0.06 | 1.45 ± 0.16 |
Intermediate | Bole | Sept. | Planted unthinned | 34 ± 2 | 21.6 ± 0.6 | 22.1 ± 0.6 | 77.4 ± 2.9 | 49.5 ± 7.3 | 0.32 ± 0.03 | 1.44 ± 0.20 |
Intermediate | Bole | Sept. | Planted thinned | 34 ± 2 | 24.6 ± 1.2 | 20.1 ± 0.9 | 69.3 ± 4.5 | 94.5 ± 18.3 | 0.38 ± 0.05 | 1.07 ± 0.12 |
Sapling | Bole | Sept. | Nat. regen. | 10.0 ± 0.3 | 7.0 ± 0.7 | 5.7 ± 1.8 | 98.0 ± 2.9 | 17.3 ± 3.3 | 0.35 ± 0.03 | 0.97 ± 0.08 |
Old seedling | Bole | Sept. | Planted | 5 | 3.3 ± 0.2 | 1.7 ± 0.1 | 76.7 ± 0.7 | 1.6 ± 1.3 | 0.23 ± 0.04 | 0.33 ± 0.03 |
Young seedling | Bole | Sept. | Planted | 3 | 1.0 ± 0.2 | 0.9 ± 0.1 | 86.6 ± 2.9 | 0.16 | 0.18 ± 0.04 | NA |
Mature | Branch | Sept. | Nat. regen. | 5 | 1.2 ± 0.4 | 0.5 ± 0.1 | 41.8 ± 0.5 | 0.62 ± 0.09 | 0.60 ± 0.11 | 0.18 ± 0.05 |
Intermediate | Branch | Sept. | Nat. regen. | 5 | 1.0 ± 0.1 | 0.6 ± 0.1 | 91.4 ± 4.9 | 0.34 ± 0.07 | 0.51 ± 0.05 | 0.16 ± 0.01 |
Ponderosa pine | ||||||||||
Old-Growth | Bole | March | Nat. regen. | 222 ± 27 | 62.3 ± 1.9 | 33.3 ± 0.4 | 67.7 ± 1.6 | 540.4 ± 34.7 | 0.23 ± 0.02 | 1.99 ± 0.06 |
Old-Growth | Bole | Sept. | Nat. regen. | 243 ± 10 | 71.9 ± 1.7 | 34.3 ± 0.4 | 71.0 ± 0.9 | 745.6 ± 72.4 | 0.26 ± 0.02 | 1.79 ± 0.18 |
Mature | Bole | Sept | Nat. regen. | 72 ± 5 | 25.9 ± 2.2 | 12.4 ± 0.9 | 69.5 ± 1.8 | 76.7 ± 15.9 | 0.21 ± 0.01 | 1.34 ± 0.15 |
Intermediate | Bole | Sept. | Nat. regen. | 40 ± 5 | 13.2 ± 0.6 | 5.8 ± 0.5 | 76.6 ± 1.0 | 23.6 ± 5.2 | 0.19 ± 0.02 | 0.58 ± 0.06 |
Sapling | Bole | Sept. | Nat. regen. | 21 ± 5 | 9.4 ± 0.5 | 3.3 ± 0.2 | 77.0 ± 1.9 | 18.9 ± 6.9 | 0.20 ± 0.03 | 0.48 ± 0.05 |
Old-Growth | Branch | Sept. | Nat. regen. | 5 | 0.7 ± 0.4 | 0.4 ± 0.1 | 50.1 ± 0.9 | 0.16 ± 0.03 | 0.40 ± 0.03 | 0.35 ± 0.05 |
Intermediate | Branch | Sept. | Nat. regen. | 5 | 0.8 ± 0.2 | 0.5 ± 0.1 | 52.9 ± 0.9 | 0.18 ± 0.02 | 0.35 ± 0.02 | 0.36 ± 0.04 |
Sapling | Branch | Sept. | Nat. regen. | 5 | 0.7 ± 0.1 | 0.4 ± 0.1 | 55.0 ± 0.9 | 0.17 ± 0.01 | 0.46 ± 0.02 | 0.27 ± 0.03 |