# Barbosa et al. 2019: Allometric models to estimate tree height in northern Amazonian ecotone forests

Barbosa, R.I., Ramírez-Narváez, P.N., Fearnside, P.M., Villacorta, C.D.A., Carvalho, L.C. da S. (2019). Allometric models to estimate tree height in northern Amazonian ecotone forests. Acta Amazonica, 49(2), 81-90.

- DOI: https://doi.org/10.1590/1809-4392201801642
- Access: open access
- Copy we read: https://www.scielo.br/j/aa/a/Csx7XwJFd3whWsjNzDSSQpw/?lang=en
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/barbosa-2019/

## Equations from this source (4)

### Height from DBH, logistic power (Table 3)

Height for Mixed tree species of ombrophilous/seasonal forest ecotone (65 fallen trees), Brazil. Inputs: DBH. DBH from 10 cm. 65 trees.

As printed (Table 3):

> Logistic Power Y = β0 / 1 + (X / β1) β2 43.6264 29.7079 -1.0709 3.372 0.7152 159.16

Page: https://treeallometry.org/equations/barbosa-2019-logistic-power/

### Height from DBH, Michaelis-Menten (Table 3, best fit)

Height for Mixed tree species of ombrophilous/seasonal forest ecotone (65 fallen trees), Brazil. Inputs: DBH. DBH from 10 cm. 65 trees.

As printed (Table 3):

> Michaelis-Menten Y = β0 × X / β1 + X 45.8528 32.8330 - 3.347 0.7149 157.09

Page: https://treeallometry.org/equations/barbosa-2019-michaelis-menten/

### Height from DBH, modified exponential (Table 3)

Height for Mixed tree species of ombrophilous/seasonal forest ecotone (65 fallen trees), Brazil. Inputs: DBH. DBH from 10 cm. 65 trees.

As printed (Table 3):

> Modified Exponential Y = β0 × exp β1 X 38.7760 -16.4933 - 3.393 0.7071 158.85

Page: https://treeallometry.org/equations/barbosa-2019-modified-exponential/

### Height from DBH, natural-log model (Table 3)

Height for Mixed tree species of ombrophilous/seasonal forest ecotone (65 fallen trees), Brazil. Inputs: DBH. DBH from 10 cm. 65 trees.

As printed (Table 3):

> Natural Logarithm Y = β0 + β1 × ln X -15.3629 10.9623 - 3.350 0.7144 157.21

Page: https://treeallometry.org/equations/barbosa-2019-natural-log/