{"id":"fonseca-2009-hieronyma-alchorneoides-total","source":{"id":"fonseca-2009","citation":"Fonseca G., W., Alice G., F., & Rey B., J. M. (2009). Modelos para estimar la biomasa de especies nativas en plantaciones y bosques secundarios en la zona Caribe de Costa Rica. Bosque (Valdivia), 30(1), 36–47.","title":"Modelos para estimar la biomasa de especies nativas en plantaciones y bosques secundarios en la zona Caribe de Costa Rica","authors":["Fonseca G., W.","Alice G., F.","Rey B., J. M."],"year":2009,"venue":"Bosque (Valdivia)","doi":"10.4067/S0717-92002009000100006","url":"https://doi.org/10.4067/S0717-92002009000100006","read_url":"https://www.scielo.cl/pdf/bosque/v30n1/art06.pdf","access":"open","checked_at":"2026-11-01","status":"current"},"name":"Hieronyma alchorneoides plantations, total tree biomass incl. roots (Bt)","output":{"quantity":"total_biomass"},"expression":"1.06 * exp(-2.12607 + 1.69594 * D^0.5)","published":{"expression":"1.06 * exp(-2.12607 + 1.69594 * d^0.5)","units":{"d":"cm"},"variables":{"d":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Hieronyma alchorneoides","family":"Phyllanthaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["CR"],"place":"Caribbean (Atlantic) lowlands of Costa Rica","biomes":["tropical"]},"stand":"plantation","fit":{"n_trees":53,"dbh_min_cm":0.5,"dbh_max_cm":28.8,"r2":0.9777,"rse":0.3478,"cf":1.06,"method":"OLS on ln(Bt) vs √d (Statgraphics); Sprugel correction factor"},"evidence":[{"field":"expression","quote":"Bt = exp(-2,12607 + 1,69594* d ^0,5) 97,77 0,3478 – 53 1,06","locator":"Cuadro 2, Hieronyma alchorneiodes"},{"field":"fit.dbh_min_cm","quote":"Para H. alchorneoides se evaluaron 58 árboles con diámetros entre 0,5 y 28,8 cm","locator":"Métodos, p. 37"},{"field":"fit.cf","quote":"Los modelos seleccionados con transformaciones logarítmicas fueron corregidos utilizando un factor de corrección (FC)","locator":"Métodos, p. 39"},{"field":"output.quantity","quote":"biomasa total (Bt), que incluye todos los componentes del árbol","locator":"Resultados, p. 39"}],"check":[{"inputs":{"D":20},"expected":248.8059,"origin":"computed","note":"computed from the Cuadro 2 model times FC 1,06"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Bt includes roots (total above + below, kg/tree). FC = 1,06 multiplied in. Diameter range is for the 58 sampled trees; the Bt model used n = 53. r2 is adjusted R²."}