{"id":"puc-kauil-2020-model2-multi","source":{"id":"puc-kauil-2020","citation":"Puc-Kauil, R., Ángeles-Pérez, G., Valdéz-Lazalde, J. R., Reyes-Hernández, V. J., Dupuy-Rada, J. M., Schneider, L., Pérez-Rodríguez, P., & García-Cuevas, X. (2020). Allometric equations to estimate above-ground biomass of small-diameter mixed tree species in secondary tropical forests. iForest, 13, 165–174.","title":"Allometric equations to estimate above-ground biomass of small-diameter mixed tree species in secondary tropical forests","authors":["Puc-Kauil, R.","Ángeles-Pérez, G.","Valdéz-Lazalde, J. R."],"year":2020,"venue":"iForest - Biogeosciences and Forestry","doi":"10.3832/ifor3167-013","url":"https://doi.org/10.3832/ifor3167-013","read_url":"https://iforest.sisef.org/pdf/?id=ifor3167-013","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Small-tree total AGB, multi-species, DBH and height model (Model II)","output":{"quantity":"agb"},"expression":"exp(-2.97501) * (D^2 * H)^0.957051","published":{"expression":"exp(-2.97501) * (DBH^2 * H)^0.957051","units":{"DBH":"cm","H":"m"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"22 small-diameter (DBH ≤ 10 cm) tree species of secondary tropical forest","group":"broadleaf"},"region":{"scope":"regional","countries":["MX"],"place":"Southeast Yucatan peninsula (between Sian Ka'an, Quintana Roo, and Calakmul, Campeche)","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":311,"dbh_min_cm":1,"dbh_max_cm":10,"method":"Nonlinear weighted OLS (SAS PROC MODEL), multi-species"},"evidence":[{"field":"expression","quote":"AGBtotal-tree multi-species= exp(-2.97501)(DBH2·H)0.957051","locator":"Tab. 1, p. 168"},{"field":"fit.n_trees","quote":"311 trees in total","locator":"Biomass data collection, p. 167"},{"field":"fit.dbh_max_cm","quote":"22 species ranging from 1 to 10 cm DBH","locator":"Biomass data collection, p. 167"}],"check":[{"inputs":{"D":6,"H":7},"expected":10.1445,"origin":"computed","note":"computed from the Tab. 1 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Multi-species total-tree equation (stem + branches + foliage) from Model II, which needs no wood density. The paper lists adj-R2 0.95 and RMSE 0.1552. No correction factor is stated."}