# Liquidambar styraciflua

Altingiaceae. 8 equations apply. Each output lists them most specific first: fitted on this species, on a variety of it, pooled fits that included it, then its genus and family. Within each step, equations the authors advised against go last, then those read from compilations; more trees come first. The order shows how specific the evidence is, not which equation predicts best.

Wood density 0.5 g/cm³, estimated from 1,545 samples in 11 studies by the [Global Wood Density Database v.2](https://doi.org/10.5281/zenodo.16919509) (Fischer et al. 2026, https://doi.org/10.1111/nph.70860; CC BY 4.0).

## Aboveground biomass

1. Westfall et al. 2024 (this species): Fitted on this species; 766–773 trees; DBH 2.54–82.55 cm; Read from the original paper.
   - [NSVB sweetgum, species-level (all ecodivisions): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-agb/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.55 cm; 773 trees.
   - [NSVB sweetgum, Subtropical Division (230): total aboveground biomass (without foliage), Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-230-agb/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.55 cm; 766 trees.

## Branch biomass

1. Westfall et al. 2024 (this species): Fitted on this species; 769–776 trees; DBH 2.54–82.55 cm; Read from the original paper.
   - [NSVB sweetgum, species-level (all ecodivisions): branch biomass (wood and bark), Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-branch/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.55 cm; 776 trees.
   - [NSVB sweetgum, Subtropical Division (230): branch biomass (wood and bark), Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-230-branch/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.55 cm; 769 trees.

## Foliage biomass

1. Westfall et al. 2024 (this species): Fitted on this species; 714–726 trees; DBH 2.54–82.55 cm; Read from the original paper.
   - [NSVB sweetgum, species-level (all ecodivisions): foliage biomass, Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-foliage/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.55 cm; 726 trees.
   - [NSVB sweetgum, Subtropical Division (230): foliage biomass, Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-230-foliage/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.55 cm; 714 trees.

## Stem volume

1. Westfall et al. 2024 (this species): Fitted on this species; 3,271–3,363 trees; DBH 2.54–82.8 cm; Read from the original paper.
   - [NSVB sweetgum, species-level (all ecodivisions): total stem wood volume (inside bark), Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-volume/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.8 cm; 3,363 trees.
   - [NSVB sweetgum, Subtropical Division (230): total stem wood volume (inside bark), Schumacher-Hall model (Eq. 1)](https://treeallometry.org/equations/westfall-2024-liquidambar-styraciflua-230-volume/), Westfall et al. 2024: Liquidambar styraciflua, United States; inputs DBH + Height; DBH 2.54–82.8 cm; 3,271 trees.