Recuperación del bosque húmedo tropical 19 años despues de la cosecha bajo cuatro sistemas de manejo forestal, Osa, Costa Rica

Abstract

Were measured all trees (d ≥ 10cm) and also were botanically identify the entries in four plots permanents of sampling (PPS) of 1 ha, established in 1990 from Estero Guerra, Osa Peninsula , Costa Rica). Based on information recollected from this plots and eight more PPS of 1 ha, established in Los Mogos and Dos Brazos de Rio Rincón, (Osa Peninsula, Costa Rica) since 1990, was analized the recovering of the forest 19 years after the use of four different systems of forestal management. In the study of the recovering of the wet tropical forest of the Osa Peninsula, were used data bases coming from the measurements done in the PPS, for trhee years: 1990 (forest without intevention), 2007 (15 years after the harverst) and 2011 (19 years after the haverst). The analisis of the recovering of the forest, was done based on the behavior of the horizontal structure, commercial groups, ecologycal unions, mortality, recruitmen and exchange rates, biologycal biodiversty, growth, conservation status and behavior of the forest 15 years after the intervention. There were no found statistical diferences between the number of individuals and the basal area per hectare, individuals and the basal area per commercial group and ecologycal union shown in the 1990 (primary forest) and the 19 years after the use, or between the management systems. Which is evidence of recovering on these areas after 19 years from the intervention. Was determined that the minimal reference value for the basal area established by the present Forestry Law should be rise for the disturbed forest in Osa Peninsula.