{"id":"gomez-2021-all-species","source":{"id":"gomez-2021","citation":"Gómez, J.D., Etchevers, J.D., Campo, J., Monterroso, A.I., Paustian, K., Asensio, C. (2021). Allometric relationships to estimate aboveground biomass of species in a tropical dry forest of Central Mexico. Madera y Bosques, 27(4), e2742441.","title":"Allometric relationships to estimate aboveground biomass of species in a tropical dry forest of Central Mexico","authors":["Gómez, J.D.","Etchevers, J.D.","Campo, J."],"year":2021,"venue":"Madera y Bosques","doi":"10.21829/myb.2021.2742441","url":"https://doi.org/10.21829/myb.2021.2742441","read_url":"https://myb.ojs.inecol.mx/index.php/myb/article/download/2441/2274","access":"open","license":"CC BY-NC-SA 4.0","checked_at":"2026-11-02","status":"current","notes":"Only the dbh-only power models (Tables 3 and 4) are captured. The multiple regressions on basal area, wood density and height (Tables 5 and 6) are not added."},"name":"Five-species pooled AGB from dbh (Table 4)","output":{"quantity":"agb"},"expression":"exp(-1.217 + 1.886 * ln(D))","published":{"expression":"exp(-1.217 + 1.886 * ln(DBH))","units":{"DBH":"cm"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Five tropical dry forest species (Acacia cochliacantha, Conzattia multiflora, Euphorbia schlechtendalii, Ipomoea arborescens, Lysiloma microphyllum)","group":"broadleaf","members":["Acacia cochliacantha","Conzattia multiflora","Euphorbia schlechtendalii","Ipomoea arborescens","Lysiloma microphyllum"],"members_complete":true},"region":{"scope":"site","countries":["MX"],"place":"Sierra de Huautla Biosphere Reserve (Ejido El Limón), Morelos","biomes":["tropical","dryland"]},"stand":"natural","fit":{"dbh_min_cm":3.5,"dbh_max_cm":32.9,"r2":0.668,"method":"Linear regression of ln(biomass) on ln(dbh)"},"evidence":[{"field":"expression","quote":"ln(Y) = ln(a) + b ln(X)","locator":"Eq. 2, p. 4"},{"field":"expression","quote":"All the species: n 60; β0 -1.217; β1 1.886; R2 0.668","locator":"Table 4, p. 9"},{"field":"fit.r2","quote":"R2 0.668","locator":"Table 4, p. 9"},{"field":"output","quote":"Y is aboveground biomass (kg), X is dbh (cm)","locator":"p. 4"}],"check":[{"inputs":{"D":10},"expected":22.7753,"origin":"computed","note":"computed from the printed coefficients"},{"inputs":{"D":20},"expected":84.1795,"origin":"computed","note":"computed from the printed coefficients"}],"rejected_by_source":{"quote":"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","locator":"Results, p. 8"},"verification":"original_read","checked_at":"2026-11-02","notes":"ln(Y) = b0 + b1 ln(DBH), natural log, no correction factor stated in the paper. Aboveground biomass includes foliage and small branches (trunk and crown sections were summed). The paper reports that the pooled model was rejected as heterogeneous; it is listed as printed. n 60 counts branch units, so n_trees is left out."}