{"id":"herrera-vasquez-2022-polylepis-racemosa","source":{"id":"herrera-vasquez-2022","citation":"Herrera Vásquez, J. W. (2022). Ecuaciones alométricas para estimar biomasa aérea y carbono en Polylepis racemosa en un bosque relicto ubicado en la comunidad de Bella Andina, Chota, Cajamarca. Tesis de Ingeniero Forestal y Ambiental, Universidad Nacional Autónoma de Chota, Peru.","title":"Ecuaciones alométricas para estimar biomasa aérea y carbono en Polylepis racemosa en un bosque relicto ubicado en la comunidad de Bella Andina, Chota, Cajamarca","authors":["Herrera Vásquez, J. W."],"year":2022,"venue":"Undergraduate thesis, Universidad Nacional Autónoma de Chota","url":"https://repositorio.unach.edu.pe/items/e9ea63fa-d11a-43dc-865b-b70102fd3bcc","read_url":"https://repositorio.unach.edu.pe/bitstreams/0d193d67-a6a6-402a-be41-faa8932cda9e/download","access":"open","checked_at":"2026-11-01","status":"current"},"name":"Polylepis racemosa AGB from stem diameter at 50 cm (model 6)","output":{"quantity":"agb"},"expression":"exp(2.394988 + 0.082807 * D50)","published":{"expression":"exp(2.394988 + 0.082807 * D50)","units":{"D50":"cm"},"output_unit":"kg"},"taxon":{"level":"species","name":"Polylepis racemosa","family":"Rosaceae","group":"broadleaf"},"region":{"scope":"site","countries":["PE"],"place":"Relict forest, Bella Andina community, Chota, Cajamarca, Peru","biomes":["tropical","montane"]},"stand":"natural","fit":{"n_trees":11,"r2":0.932,"method":"OLS on ln(biomass) vs D50 (model 6 of 10 tested); no correction factor reported"},"evidence":[{"field":"expression","quote":"LnBA=2,394988+0,082807*D50; el que alcanza un R2: 0,932","locator":"Results, text under Figura 8"},{"field":"fit.n_trees","quote":"Las medidas dasométricas del diámetro 50 centímetros (D50), altura total (ht), número de ramas (NR) y diámetro de copa (DC) de los 11 árboles de Polylepis racemosa","locator":"Results, before Tabla 2"},{"field":"notes","quote":"La marca de clase de D50 centímetros (Figura 4), se distribuye desde 7,5 a 36,2","locator":"Results, after Tabla 2"}],"check":[{"inputs":{"D50":21.6},"expected":65.6029,"origin":"computed","note":"computed from the published form; Tabla 3 tree F (D50 21,6 cm) weighed 59,723 kg"},{"inputs":{"D50":36.2},"expected":219.7744,"origin":"computed","note":"computed from the published form; Tabla 3 tree K weighed 186,968 kg"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Uses D50, the stem diameter 50 cm above ground (new canonical variable D50, cm), not DBH. Exponential (not power) form: ln(biomass) is linear in D50. Fitted on 11 destructively sampled trees, one per diameter class, D50 7,5–36,2 cm, total height 1,8–7,0 m; samples oven-dried at 105 °C. The listed D50 values of the sampled trees equal the class marks of Tabla 1, so they may be class midpoints rather than measured diameters. Undergraduate thesis, small sample: use with caution."}