ISSN: 1659-2751



Carbon Fixation in a Secondary Forest in the Tropical Region of Costa Rica


The conversion of abandoned pastures to secondary forests constitutes an alternative to increase carbon fixation, therefore contributing to the mitigation of global warming. The objective of this study was to determine the fixed carbon in the above-ground biomass of a 15 year-old secondary forest, located in the humid tropics of Costa Rica. Ten plots of 100 m2 were harvested separately by component (mulch, herbaceous plants, vines, understorey and saplings) for the direct determination of its above-ground biomass and fixed carbon. Data of diameter at breast height (DBH), height and density were taken in the plots for calculation of volume and stored carbon of trees over 10 cm diameter. The total above-ground biomass was (99.9 ± 15.7) Mg ha-1. In the secondary forest, 46.4 Mg ha-1 of C were fixed, with a fixation rate of 3.1 Mg ha-1 of C per year.

Key words: Aerial biomass, secondary forest, carbon sequestration, saplings, understorey.

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