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dc.contributor.authorSitoe, Almeida A.
dc.date.accessioned2020-11-20T21:50:15Z
dc.date.available2020-11-20T21:50:15Z
dc.date.issued2000
dc.identifier.urihttps://repositorio.catie.ac.cr/handle/11554/10005
dc.descriptionTesis (Ph. D.)--CATIE, Turrialba (Costa Rica), 2000es_ES
dc.descriptionReferencias en las páginas 146-157
dc.descriptionIlustraciones. Tablas
dc.description157 páginas
dc.description.abstractThe gap modelig approach was used to develop a simulation model for Pentaclethra forests of the Central American Atlantic Moist ecoregion. The model uses empirically estimated functions fitted from a eight-years field data. These functions include diameter growth, height function, and the effects of crown exposure and form on diameter increment. Volume functions were obtained from local literature. Ecologically estimated parameters were obtained for those procedures not directly fitted from field data. Trial and error procedure was used to calibrate the desired model output level. The model was tested and evaluated comparing long-term simulations with the presently known characteristics of Pentaclethra forest. Ecologically estimated parameters were evaluated for sensitivity. The resulting model called Gavilán, after the Spanish name of Pentaclethra macroloba, the most abundant species, could represent most of the dynamic charateristics of Pentaclethra forest. The use of species growth rate and position of the adult size on the mature forest strata for diameter increment functions produced a modeling efficiency of 0.39. These species groups were also used to estimate growth mortality and recruitment parameters to give a more realistic approach. Initial species abundance and gap opening are used together with species regeneration guild to estimate the probability of a species to establish. The model maintained the characteristics of Pentaclethra forest over a simulation period of 400 years, starting from an observed plot after logging. Ecological parameters were moderately sensitive, and a variation of 20 percent of the initial value produced between 6 and 25 percent in the model output. The model was used to estimate the cutting cycles when the silvicultural treatment of liberation was applied. This was found to be between 15 and 35 years with a sustainable yield of about 20 m3 ha-1 in each harvesting. After 200 years of successively logging in a 20 years periodicity the forest structure, the species richness and diversity were maintained. These findings suggest that forest management of Pentaclethra forests could be done in an ecologically sustainable way if logging intensity and silvicultural treatments are maintained within reasonable limits.es_ES
dc.language.isoenes_ES
dc.publisherCATIE, Turriaba (Costa Rica)es_ES
dc.subjectBOSQUE TROPICAL HUMEDOes_ES
dc.subjectPENTACLETHRA MACROLOBAes_ES
dc.subjectSISTEMA DE RENUEVOS DE CEPAes_ES
dc.subjectMANEJO FORESTALes_ES
dc.subjectMODELOS DE SIMULACIONes_ES
dc.subjectMODELOS DINAMICOSes_ES
dc.subjectPRODUCCION FORESTALes_ES
dc.subjectBIOMASAes_ES
dc.subjectCOSTA RICAes_ES
dc.subjectTROPICAL RAIN FORESTSes_ES
dc.subjectCOPPICE SYSTEMes_ES
dc.subjectSIMULATION MODELSes_ES
dc.subjectDYNAMIC MODELSes_ES
dc.subjectFORESTRY PRODUCTIONes_ES
dc.subjectBIOMASSes_ES
dc.titleA patch-model for managed tropical lowland rain forests in Costa Ricaes_ES
dc.typeTesises_ES


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