Equations / Aboveground biomass
North American taxa group: Betulaceae < 0.40 spg (Table 5)
Aboveground biomassAlnus · BetulaceaeUnited StatesmixedRead from the original paper
Covers the whole genus
Equation
As printed (Table 5 caption, p. 140)
ln(biomass) = β0 + β1 ln(diameter)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-2.5932 + 2.5349 * ln(D))D- Diameter at breast height (1.3 m), cm
Alders: red alder (Alnus rubra) and 'A. spp.' (Sitka alder). Median specific gravity of the group: 0.37. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.
Source
doi:10.1093/forestry/cpt053 · Open access · copy we read
Betulaceae < 0.40 spg 0.37 −2.5932 2.5349 46 10 dbh 3–64 0.81
Betulaceae Alnus rubra Alder, red 351 0.37
we did not include a correction (Baskerville, 1972) for underestimation
- DBH range
- 3–64 cm
- R²
- 0.81
- Method
- Weighted regression of ln(biomass) on ln(dbh) fitted to 46 pseudodata points generated from 10 published equations; no back-transform correction
- Where
- United States (equations compiled from US and Canadian studies)
- Last checked
- 2026-11-03
Calculate
415
Aboveground biomass (kg)
195
Carbon (kg), ×0.47
715
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 = 30 | 415 | 415 | Computed from the printed form computed from the published form at dbh = 30 cm |
Related
- Alnus acuminata AGB, DBH only (13-year restoration plantation) · Giraldo-Salazar et al. 2025 · DBH
- Gray alder, European Russia pooled: aboveground biomass from D (Eq. 5) · Karaban et al. 2023 · DBH
- Gray alder, Arkhangelsk: aboveground biomass from D (Table 2) · Karaban et al. 2023 · DBH
- Red alder total aboveground biomass from DBH and height (Table 4) · Poudel et al. 2019 · DBH + Height
- Alnus acuminata (aliso) AGB, sum of SUR component models (DBH, height) · Riofrío et al. 2013 · DBH + Height
- North American taxa group: Abies ≥ 0.35 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Abies < 0.35 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Aceraceae ≥ 0.50 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Aceraceae < 0.50 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae 0.40–0.49 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae 0.50–0.59 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae ≥ 0.60 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Fabaceae/Juglandaceae, Carya (Table 5) · same paper · Aboveground biomass