RT info:eu-repo/semantics/article T1 Modelos para estimar la biomasa de especies nativas en plantaciones y bosques secundarios en la zona Caribe de Costa Rica T2 Models for biomass estimation in native forest tree plantations and secondary forests in the Costa Rican Caribbean Region A1 Rey Benayas, José María A1 Fonseca , William A1 Alice G., Federico K1 Biomass estimation models K1 Secondary succession K1 Hieronyma alchorneoides K1 Vochysia guatemalensis K1 Biomass expansion factors K1 Modelos de biomasa K1 Sucesión secundaria K1 Hieronyma alchorneoides K1 Vochysia guatemalensis K1 Factores expansión biomasa K1 Ciencia K1 Medio Ambiente K1 Science K1 Environmental science AB The use of forest ecosystems as carbon sinks is now more accepted. However, credible information about its growth in terms ofbiomass and its capacity to capture and store CO2 is still insufficient in order to suggest ways by which forest owners should becompensated. The objective for this study was to construct models that allow us to determine tree biomass for native tree plantationsof Hieronyma alchorneoides Allemào, Vochysia guatemalensis Donn and a group of 35 species of secondary forests in theCosta Rican Caribbean region. In each plantation the tree with the mean diameter at breast height (d) was harvested; in secondaryforests the harvested tree corresponded to the mean d tree with the highest Importance Value Index (IVI) for each diametric class.Destructive sampling was used, separating each tree component and collecting a field sample in order to determine dry mattercontent (MS). All selected models had R2aj values above 82.6%. Tree species from secondary forests showed the lowest R2ajvalues. Stem, roots and total biomass had R2aj values above 91.3%, while leaves and branches had values between 82.6 and 94.1%.Biomass expansion factor (BEF) in secondary forest was 1.44 and in forest tree plantations it was 1.56. The radical biomass (Bra)relationship to total aboveground biomass (Bat) and stem biomass (Bf) in secondary forests was 0.25 and 0.37, respectively, 0.26and 0.39 for V. guatemalensis and 0.3 and 0.52 for H. alchorneoides. PB Universidad Austral de Chile SN 0304-8799 YR 2009 FD 2009 LK http://hdl.handle.net/10017/21355 UL http://hdl.handle.net/10017/21355 LA spa NO Este trabajo ha sido financiado por la UniversidadNacional Autónoma de Costa Rica, el Ministerio de Cienciay Tecnología de Costa Rica y gracias al apoyo de la empresaprivada. El primer autor se benefició de una beca delPrograma Miguel de Cervantes para realizar su tesis doctoralen la Universidad de Alcalá de Henares, España. DS MINDS@UW RD 29-mar-2024