Equations / Aboveground biomass
North American taxa group: Fagaceae, evergreen (Table 5)
Aboveground biomassFagaceae, evergreen (Chrysolepis chrysophylla, Lithocarpus densiflorus, Quercus douglasii, Q. laurifolia, Q. minima) · FagaceaeUnited StatesmixedRead from the original paper
Fitted on these 5 species: Chrysolepis chrysophylla, Lithocarpus densiflorus, Quercus douglasii, Quercus laurifolia, Quercus minima
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(-2.2198 + 2.4410 * ln(D))D- Diameter at breast height (1.3 m), cm
Golden chinkapin, tanoak, and blue, laurel and dwarf live oak. Median specific gravity of the group: 0.58. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.
Source
doi:10.1093/forestry/cpt053 · Open access · copy we read
Fagaceae, evergreen 0.58 −2.2198 2.4410 54 7 dbh 3–66 0.84
Fagaceae Lithocarpus densiflorus Tanoak 631 0.58 2
we did not include a correction (Baskerville, 1972) for underestimation
- DBH range
- 3–66 cm
- R²
- 0.84
- Method
- Weighted regression of ln(biomass) on ln(dbh) fitted to 54 pseudodata points generated from 7 published equations; no back-transform correction
- Where
- United States (equations compiled from US and Canadian studies)
- Last checked
- 2026-11-03
Calculate
438
Aboveground biomass (kg)
206
Carbon (kg), ×0.47
755
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 | 438 | 438 | Computed from the printed form computed from the published form at dbh = 30 cm |
Related
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- 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: Betulaceae < 0.40 spg (Table 5) · same paper · Aboveground biomass