Acer saccharum / Aboveground biomass
Canadian national equation, sugar maple, dbh only (sum of wood, bark, branches, foliage; Table 3)
Aboveground biomassAcer saccharum · SapindaceaeCanadanaturalRead from the original paper
Kent P. McFarland · CC0 · iNaturalistEquation
As printed (Eq. 2)
y wood = β wood1 D^βwood2 + ewood … y bark = β bark1 D^βbark2 + e bark … y foliage = β foliage1 D^βfoliage2 … y branches = β branches1 D^βbranches2
In this library's units, ready to compute (kg)
Aboveground biomass = 0.1315 * D^2.3129 + 0.0631 * D^1.9241 + 0.033 * D^2.3741 + 0.0393 * D^1.693D- Diameter at breast height (1.3 m), cm
Total aboveground biomass = wood + bark + branches + foliage, each a power function of dbh (cm), kg dry mass; the total is the sum of the four compartment equations (additivity by construction). r2 is the adjusted R² of the total. The paper also gives dbh+height equations (Table 4). Ung et al. (2008) later revised parameters for some species with BC data; not used here.
Source
doi:10.1139/x05-112 · Paywalled · copy we read
bwood1 0.1315 bwood2 2.3129 bbark1 0.0631 bbark2 1.9241 bbranches1 0.033 bbranches2 2.3741 bfoliage1 0.0393 bfoliage2 1.693
Sugar maple bwood1 0.1315 0.0084
Sugar maple 235
Sugar maple Total 0.0828 0.97 87.6
- Trees measured
- 235
- DBH range
- 2–57.8 cm
- R²
- 0.97
- Method
- Nonlinear seemingly unrelated regression with weight functions; additivity constrained so compartments sum to total
- Where
- Canada (ENFOR archival data, early 1980s)
- Last checked
- 2026-11-01
Calculate
201
Aboveground biomass (kg)
94.5
Carbon (kg), ×0.47
347
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
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 | 201 | 201 | Computed from the printed form computed from the published form at dbh = 20 cm |
Related
- Acer campestre, aboveground dry mass vs height (Model 2) · Kartashova et al. 2026 · Height
- Canadian national equation, black spruce, dbh only (sum of wood, bark, branches, foliage; Table 3) · same paper · Aboveground biomass
- Canadian national equation, jack pine, dbh only (sum of wood, bark, branches, foliage; Table 3) · same paper · Aboveground biomass
- Canadian national equation, red oak, dbh only (sum of wood, bark, branches, foliage; Table 3) · same paper · Aboveground biomass
- Canadian national equation, trembling aspen, dbh only (sum of wood, bark, branches, foliage; Table 3) · same paper · Aboveground biomass