Larix laricina / Aboveground biomass
Canadian national equation, tamarack larch, 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 = 0.0625 * D^2.4475 + 0.0174 * D^2.1109 + 0.0196 * D^2.2652 + 0.0801 * D^1.4875D- 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
Tamarack larch bwood1 0.0625
bwood2 2.4475
bbark1 0.0174
bbark2 2.1109
bbranches1 0.0196
bbranches2 2.2652
bfoliage1 0.0801
bfoliage2 1.4875
Tamarack larch 575 14.7±0.3 12.3±0.2 96.4±4.8
(1.8;44.5) (2.2;30.5) (0.4;938.9)
Total 0.0052 0.95 25.7 3.88 0.0043 0.98 17.3 3.72
- Trees measured
- 575
- DBH range
- 1.8–44.5 cm
- R²
- 0.95
- 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 (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 | 129 | 129 | Computed from the printed form computed from the published form at dbh = 20 cm |
Related
- Chekanovsky larch AGB from DBH only, unweighted (Table 3) · Altanzagas et al. 2022 · DBH
- Chekanovsky larch AGB from DBH only, weighted (Table 3) · Altanzagas et al. 2022 · DBH
- Chekanovsky larch AGB from D²H, unweighted (Table 3) · Altanzagas et al. 2022 · DBH + Height
- Chekanovsky larch AGB from D²H, weighted (Table 3) · Altanzagas et al. 2022 · DBH + Height
- Chekanovsky larch AGB from D and H, weighted (Table 3) · Altanzagas et al. 2022 · DBH + Height
- Gmelin larch AGB from DBH only, unweighted (Table 3) · Altanzagas et al. 2022 · DBH
- Gmelin larch AGB from DBH only, weighted (Table 3) · Altanzagas et al. 2022 · DBH
- Gmelin larch AGB from D²H, unweighted (Table 3) · Altanzagas et al. 2022 · 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