Betula alleghaniensis / Aboveground biomass
Canadian national equation, yellow birch, dbh only (sum of wood, bark, branches, foliage; Table 3)
© Douglas Goldman · CC BY-SA · iNaturalistAs printed (Eq. 2)
In this library's units, ready to compute (kg)
Aboveground biomass = 0.1932 * D^2.1569 + 0.0192 * D^2.2475 + 0.0305 * D^2.4044 + 0.1119 * D^1.3973D- Diameter at breast height (1.3 m), cm
Total aboveground biomass = wood + bark + branches + foliage, each fitted as its own equation; the total is their sum (additivity by construction). 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
y bark = β bark1D βbark2 + e bark
y branches = β branches1D βbranches2 + e branches
y foliage = β foliage1D βfoliage2 + efoliage
Yellow birch bwood1 0.1932
bwood2 2.1569
bbark1 0.0192
bbark2 2.2475
bbranches1 0.0305
bbranches2 2.4044
bfoliage1 0.1119
bfoliage2 1.3973
Yellow birch 280 25.7±0.9 16.4±0.3 494.4±34.4
(0.8;70.3) (2.7;25.6) (0.1;2951.4)
Total 2.8971 0.94 145.5 2.34 0.9527 0.94 135.6 2.59
- Trees measured
- 280
- DBH range
- 0.8–70.3 cm
- R²
- 0.94
- Method
- Nonlinear seemingly unrelated regression with weight functions; additivity constrained so compartments sum to total
- Where
- Canada: Newfoundland and Labrador, Ontario, Quebec (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 | 188 | 188 | Computed from the printed form computed from the published form at dbh = 20 cm |
Related
- North American taxa group: Betulaceae 0.50–0.59 spg (Table 5) · Chojnacky et al. 2014 · DBH
- White birch aboveground biomass from D only (MS-2) (sum of components, Table 5) · Dong et al. 2018 · DBH
- White birch aboveground biomass from D and H (MS-3) (sum of components, Table 6) · Dong et al. 2018 · DBH + Height
- Canadian national equation, grey birch, dbh and height (sum of wood, bark, branches, foliage; Table 4) · Lambert et al. 2005 · DBH + Height
- Canadian national equation, grey birch, dbh only (sum of wood, bark, branches, foliage; Table 3) · Lambert et al. 2005 · DBH
- Canadian national equation, white birch, dbh and height (sum of wood, bark, branches, foliage; Table 4) · Lambert et al. 2005 · DBH + Height
- Canadian national equation, white birch, dbh only (sum of wood, bark, branches, foliage; Table 3) · Lambert et al. 2005 · DBH
- Canadian national equation, yellow birch, dbh and height (sum of wood, bark, branches, foliage; Table 4) · Lambert et al. 2005 · DBH + Height
- 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