Populus tremuloides / Foliage biomass
Canadian national equation, trembling aspen, dbh and height (foliage; Table 4)
© Douglas Goldman · CC BY-SA · iNaturalistAs printed (Eq. 3)
In this library's units, ready to compute (kg)
Foliage biomass = 0.027 * D^1.6183D- Diameter at breast height (1.3 m), cm
Foliage is leaves and twigs. Height drops out of the foliage term: the paper leaves its height exponent blank (—, not significantly different from zero). r2 is the adjusted R² (AdjRSq) of this compartment in Table 5. Fitted on the original scale (weighted nonlinear seemingly unrelated regression), so there is no back-transform correction. Dead branches, cones and fruits are not part of aboveground biomass in this work (Materials). Stand type was not always recorded. Ung, Bernier & Guo (2008) later revised parameters for some species with British Columbia data; not used here.
doi:10.1139/x05-112 · Paywalled · copy we read
bfoliage1 0.0270
bfoliage2 1.6183
bfoliage3 —
Trembling aspen 773 17.7±0.4 15.8±0.2 161.7±7.2
(0.7;47.2) (1.8;28.3) (0.1;1081.5)
Foliage 0.0328 0.43 2.7 1.74 0.0234 0.43 2.7 1.85
- Trees measured
- 773
- DBH range
- 0.7–47.2 cm
- Height range
- 1.8–28.3 m
- R²
- 0.43
- Method
- Nonlinear seemingly unrelated regression with weight functions; additivity constrained so compartments sum to total
- Where
- Canada: Alberta, Manitoba, Newfoundland and Labrador, Nova Scotia, Northwest Territories, Ontario, Quebec, Saskatchewan, Yukon (ENFOR archival data, early 1980s)
- Last checked
- 2026-11-03
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 20, H = 15 | 3.44 | 3.44 | Computed from the printed form computed from the published form at dbh = 20 cm, H = 15 m |
Related
- Populus balsamifera leaf biomass, cross-sectional area at 0.3 m (LLRC) · Flade et al. 2021 · D30
- Populus balsamifera leaf biomass, cross-sectional area at 0.3 m (NLS) · Flade et al. 2021 · D30
- Populus tremuloides leaf biomass, cross-sectional area at 0.3 m (LLRC) · Flade et al. 2021 · D30
- Populus tremuloides leaf biomass, cross-sectional area at 0.3 m (NLS) · Flade et al. 2021 · D30
- Canadian national equation, balsam poplar, dbh and height (foliage; Table 4) · Lambert et al. 2005 · DBH + Height
- Canadian national equation, balsam poplar, dbh only (foliage; Table 3) · Lambert et al. 2005 · DBH
- Canadian national equation, largetooth aspen, dbh and height (foliage; Table 4) · Lambert et al. 2005 · DBH + Height
- Canadian national equation, largetooth aspen, dbh only (foliage; Table 3) · Lambert et al. 2005 · DBH
- Canadian national equation, alpine fir, dbh only (branches; Table 3) · same paper · Branch biomass
- Canadian national equation, alpine fir, dbh and height (branches; Table 4) · same paper · Branch biomass
- Canadian national equation, alpine fir, dbh and height (foliage; Table 4) · same paper · Foliage biomass
- Canadian national equation, alpine fir, dbh and height (stem wood plus stem bark; Table 4) · same paper · Stem biomass
- Canadian national equation, alpine fir, dbh and height (sum of wood, bark, branches, foliage; Table 4) · same paper · Aboveground biomass
- Canadian national equation, alpine fir, dbh only (foliage; Table 3) · same paper · Foliage biomass
- Canadian national equation, alpine fir, dbh only (stem wood plus stem bark; Table 3) · same paper · Stem biomass
- Canadian national equation, alpine fir, dbh only (sum of wood, bark, branches, foliage; Table 3) · same paper · Aboveground biomass