{"id":"cuevas-2022-s2-foliage","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 S2 (D²H, Eq. 7-10): foliage (twigs with leaves) biomass","output":{"quantity":"foliage_biomass"},"expression":"exp(-5.14483 + 0.790513 * ln(D^2 * H))","published":{"expression":"exp(-5.14483 + 0.790513 * ln(Dn^2 * 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":"Brh = e^[−β30+β31 ln(Dn² AT)] + ε3 (9); Table 2, S2 Ramillas con hojas: β30 5.14483, β31 0.790513","locator":"Eq. 9, Table 2 (S2)"},{"field":"fit.n_trees","quote":"destructivo de 17 individuos","locator":"Resumen / Table 1"}],"check":[{"inputs":{"D":20.5,"H":12},"expected":4.92779,"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":18.9082,"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 0.9821, branches 0.9769, twigs with leaves 0.8419, total 0.9931 (Table 3). Dn and AT are the paper's diameter at breast height and total height."}