Acer rubrum / Branch biomass
NSVB red maple, species-level: total branch biomass (wood and bark), Schumacher-Hall model (Eq. 1)
mefisher · CC0 · iNaturalistAs printed (Example 2, p. 15)
In this library's units, ready to compute (kg)
Branch biomass = 0.45359237 * 0.011144618401 * (D/2.54)^3.269520661293 * (H/0.3048)^0.421304343724D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Output is dry weight of all branch wood and bark (Wbranch) before NSVB's harmonization with total AGB; the harmonized branch weight differs. Species-level coefficients (no ecodivision): table S7a in the supplement has no red maple row for M210, the division of the tree in Example 2, so the example uses the species-level row; NSVB uses division-specific coefficients where table S7a has a row for the tree's division. These are the coefficients NSVB applies to red maple in the Warm Continental Mountains (M210). Paper units: in, ft, lb; expression converts D cm→in (/2.54), H m→ft (/0.3048) and lb→kg (×0.45359237). n and the DBH range are from the scorecard for BRT_WDBK_DW_TOT across ecodivisions (table S13). DBH is measured at 4.5 ft (1.37 m).
doi:10.2737/WO-GTR-104 · Open access · copy we read
Assume a red maple (Acer rubrum; SPCD = 316)
growing in the Warm Continental Mountains (DIVISION = M210)
yi = a × Di^b × Hi^c + εi
Di is diameter (inches) at breast height (4.5 feet), Hi is total tree height (feet)
units for volume and biomass predictions are cubic feet and pounds, respectively
total branch wood and bark biomass
"Branches","BRT_WDBK_DW_TOT","316",469,6.58379530916844,1,33.7
key modeling statistics such as sample sizes (n), tree diameter distributions (minimum, mean, and maximum)
If a species occurs in an ecodivision not explicitly listed, the entry having no ecodivision noted is used.
- Trees measured
- 469
- DBH range
- 2.54–85.6 cm
- Method
- NSVB Schumacher-Hall model (Eq. 1), coefficients for SPCD 316 species-level row (no DIVISION) from table S7a (the total branch biomass (wood and bark) table used in Example 2); fitted with weighted regression to destructively sampled trees
- Where
- United States, species-level fit (NSVB uses it wherever table S7a has no row for the tree's ecodivision)
- 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 = 28.2, H = 11.6 | 61.2 | 61.2 | Value printed in the paper Example 2 (p. 15) prints 135.001927997271 lb for D = 11.1 in, H = 38 ft; inputs and expected converted to cm, m, kg |
Related
- Canadian national equation, red maple, dbh only (branches; Table 3) · Lambert et al. 2005 · DBH
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- NSVB boxelder, species-level (all ecodivisions): branch biomass (wood and bark), Schumacher-Hall model (Eq. 1) · Westfall et al. 2024 · DBH + Height
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