# Ipomoea arborescens

Convolvulaceae. 3 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.

## Aboveground biomass

1. Gómez et al. 2021 (this species): Fitted on this species; 8 trees; DBH 8–32.4 cm; Read from the original paper.
   - [Ipomoea arborescens AGB from dbh (Table 3)](https://treeallometry.org/equations/gomez-2021-i-arborescens/), Gómez et al. 2021: Ipomoea arborescens, Mexico; inputs DBH; DBH 8–32.4 cm; 8 trees.

2. Gómez et al. 2021 (pooled, includes it): Pooled fit on 5 species, this one included; Number of trees not stated; DBH 3.5–32.9 cm; Read from the original paper.
   - [Five-species pooled AGB from dbh (Table 4)](https://treeallometry.org/equations/gomez-2021-all-species/), Gómez et al. 2021: Five tropical dry forest species (Acacia cochliacantha, Conzattia multiflora, Euphorbia schlechtendalii, Ipomoea arborescens, Lysiloma microphyllum), Mexico; inputs DBH; DBH 3.5–32.9 cm; its authors advise against it.
     > Comparison of the regression parameter homogeneity of the five species determined rejection of the null hypothesis, and thus, a single model cannot be fit satisfactorily to the database of the species involved in the present study (Results, p. 8)

3. Gómez et al. 2021 (pooled, includes it): Pooled fit on 3 species, this one included; Number of trees not stated; Read from the original paper.
   - [Lower wood density subgroup (CEI) AGB from dbh (Table 4)](https://treeallometry.org/equations/gomez-2021-cei-group/), Gómez et al. 2021: Conzattia multiflora, Euphorbia schlechtendalii and Ipomoea arborescens (CEI subgroup, lower wood density), Mexico; inputs DBH; its authors advise against it.
     > Thus, it is only possible to use a single equation for the species of the first subgroup, but not for those of the second or all species together (Table 4). (Results, p. 8)

## General equations that may apply

Fitted on many species across the tropics or the world, so not ranked against the ones above.

- [Dry tropical zone AGB from DBH (Eq. 3.2.1)](https://treeallometry.org/equations/brown-1997-dry/), Brown 1997: Tropical broadleaf trees (mixed species), Pantropical; inputs DBH; DBH 5–40 cm; 28 trees.
- [Moist tropical zone AGB, power law (Eq. 3.2.4)](https://treeallometry.org/equations/brown-1997-moist-power/), Brown 1997: Tropical broadleaf trees (mixed species), Pantropical; inputs DBH; DBH 5–148 cm; 170 trees.
- [Moist tropical zone AGB, quadratic (Eq. 3.2.3)](https://treeallometry.org/equations/brown-1997-moist-quadratic/), Brown 1997: Tropical broadleaf trees (mixed species), Pantropical; inputs DBH; DBH 5–148 cm; 170 trees.
- [Wet tropical zone AGB, quadratic (Brown 1997 Eq. 3.2.5)](https://treeallometry.org/equations/brown-iverson-1992-wet/), Brown & Iverson 1992: Tropical broadleaf trees (mixed species), Pantropical; inputs DBH; DBH 4–112 cm; 169 trees; from a secondary source.
- [Dry forest AGB with height (Model I)](https://treeallometry.org/equations/chave-2005-dry-h/), Chave et al. 2005: Tropical broadleaf trees, Pantropical; inputs Wood density + DBH + Height; DBH 5–156 cm.
- [Dry forest AGB without height (Model II)](https://treeallometry.org/equations/chave-2005-dry-noh/), Chave et al. 2005: Tropical broadleaf trees, Pantropical; inputs Wood density + DBH; DBH 5–156 cm.
- [Moist forest AGB with height (Model I)](https://treeallometry.org/equations/chave-2005-moist-h/), Chave et al. 2005: Tropical broadleaf trees, Pantropical; inputs Wood density + DBH + Height; DBH 5–156 cm.
- [Moist forest AGB without height (Model II)](https://treeallometry.org/equations/chave-2005-moist-noh/), Chave et al. 2005: Tropical broadleaf trees, Pantropical; inputs Wood density + DBH; DBH 5–156 cm.
- [Wet forest AGB with height (Model I)](https://treeallometry.org/equations/chave-2005-wet-h/), Chave et al. 2005: Tropical broadleaf trees, Pantropical; inputs Wood density + DBH + Height; DBH 5–156 cm.
- [Wet forest AGB without height (Model II)](https://treeallometry.org/equations/chave-2005-wet-noh/), Chave et al. 2005: Tropical broadleaf trees, Pantropical; inputs Wood density + DBH; DBH 5–156 cm.
- [Pantropical AGB with height (Eq. 4)](https://treeallometry.org/equations/chave-2014-eq4/), Chave et al. 2014: Tropical trees (58 sites), Pantropical; inputs Wood density + DBH + Height; DBH 5–212 cm; 4,004 trees.
- [Pantropical AGB with height, exponent fixed at 1 (Eq. 5)](https://treeallometry.org/equations/chave-2014-eq5/), Chave et al. 2014: Tropical trees (58 sites), Pantropical; inputs Wood density + DBH + Height; DBH 5–212 cm; 4,004 trees.
- [Pantropical height–diameter model with stress index E (Eq. 6a)](https://treeallometry.org/equations/chave-2014-eq6a/), Chave et al. 2014: Tropical trees (58 sites), Pantropical; inputs E + DBH; DBH 5–212 cm.
- [Pantropical AGB without height, with stress index E (Eq. 7)](https://treeallometry.org/equations/chave-2014-eq7/), Chave et al. 2014: Tropical trees (58 sites), Pantropical; inputs E + Wood density + DBH; DBH 5–212 cm; 4,004 trees.
- [Pan moist tropical AGB from DBH, height and wood density (Table 4, model 5)](https://treeallometry.org/equations/djomo-2010-pan-d-d2h-rho/), Djomo et al. 2010: Mixed species, pan moist tropical forests (Campo-Ma'an plus data from Asia and South America), Pantropical; inputs DBH + Height + Wood density; DBH 1–138 cm; 274 trees.
- [Pan moist tropical AGB from DBH (Table 4, model 2)](https://treeallometry.org/equations/djomo-2010-pan-d/), Djomo et al. 2010: Mixed species, pan moist tropical forests (Campo-Ma'an plus data from Asia and South America), Pantropical; inputs DBH; DBH 1–148 cm; 443 trees.
- [Pan moist tropical AGB from D²H (Table 4, model 3)](https://treeallometry.org/equations/djomo-2010-pan-d2h/), Djomo et al. 2010: Mixed species, pan moist tropical forests (Campo-Ma'an plus data from Asia and South America), Pantropical; inputs DBH + Height; DBH 1–138 cm; 274 trees.
- [Pantropical Weibull height–diameter model](https://treeallometry.org/equations/feldpausch-2012-weibull-pantropical/), Feldpausch et al. 2012: Tropical forest trees (permanent plots), Pantropical; inputs DBH; DBH from 10 cm; 42,656 trees.