{"id":"cuevas-2022-s1-branch","source":{"id":"cuevas-2022","citation":"Cuevas Cruz, J. C., Aquino Ramírez, M., Kú Chalé, R. de la C., & Morales Sosa, I. J. (2022). Ecuaciones alométricas aditivas para estimar biomasa aérea y concentración de carbono de Piscidia piscipula (L.) Sarg. Madera y Bosques, 28(3), e2832356.","title":"Ecuaciones alométricas aditivas para estimar biomasa aérea y concentración de carbono de Piscidia piscipula (L.) Sarg.","authors":["Cuevas Cruz, J. C.","Aquino Ramírez, M.","Kú Chalé, R. de la C."],"year":2022,"venue":"Madera y Bosques","doi":"10.21829/myb.2022.2832356","url":"https://doi.org/10.21829/myb.2022.2832356","read_url":"https://myb.ojs.inecol.mx/index.php/myb/article/download/2356/2424","access":"open","license":"CC BY-NC-SA 4.0","checked_at":"2026-11-02","status":"current"},"name":"Piscidia piscipula, additive system S1 (D and H, Eq. 3-6): branch biomass","output":{"quantity":"branch_biomass"},"expression":"exp(-3.90699 + 2.239099 * ln(D) + 0.486697 * ln(H))","published":{"expression":"exp(-3.90699 + 2.239099 * ln(Dn) + 0.486697 * ln(AT))","units":{"AT":"m","Dn":"cm"},"variables":{"Dn":"D","AT":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Piscidia piscipula (L.) Sarg.","family":"Fabaceae","group":"broadleaf"},"region":{"scope":"site","countries":["MX"],"place":"Escárcega, Campeche (selva mediana subperennifolia)","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":17,"dbh_min_cm":5.7,"dbh_max_cm":55,"h_min_m":8.12,"h_max_m":21,"method":"Additive nonlinear system of component equations fitted simultaneously by generalized method of moments (GMM)"},"evidence":[{"field":"expression","quote":"Br = e^[−β20+β21 ln(Dn)+β22 ln(AT)] + ε2 (4); Table 2, S1 Ramas: β20 3.90699, β21 2.239099, β22 0.486697","locator":"Eq. 4, Table 2 (S1)"},{"field":"fit.n_trees","quote":"destructivo de 17 individuos","locator":"Resumen / Table 1"}],"check":[{"inputs":{"D":20.5,"H":12},"expected":58.2904,"origin":"computed","note":"computed from the published form (Table 2 coefficients, intercept with the printed minus sign)"},{"inputs":{"D":40.2,"H":17.1},"expected":312.847,"origin":"computed","note":"computed from the published form (Table 2 coefficients, intercept with the printed minus sign)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"The paper prints the intercept as a positive estimate and the model with a minus sign in front of it (e^[−β0 + ...]); applied that way. Adjusted R2 (not stored): stem 0.9911, branches 0.9789, twigs with leaves 0.8957, total 0.9919 (Table 3). Dn and AT are the paper's diameter at breast height and total height."}