Estimation of above Ground Biomass in Logged over Areas, North Borneo, Indonesia
Muhdi, Elias, Daniel Murdiyarso, Juang Rata Matangaran

Determination of the number of trees felled sample is conducted using stratified random sampling based on tree diameter class (stratum) in accordance with the results of the analysis of vegetation, which consists of class diameter as a follows: 5-20 cm, 20-30 cm, 30-40 cm, 40-50, 50-60 cm and > 60 cm. Based on the tree sample selected, algometric equation was W=0.041586D2.70. Developing algometric equation of the biomass, potential biomass of trees on loggeg over areas of conventional logging (CL) and reduced impact logging (RIL) plots can be expected. Algometric equation estimate total biomass of tree instance by using independent variables and the response variable diameter was used to estimate total biomass of trees in natural tropical forests. The result of the estimation of the potential biomass aboveground biomass in primary forest and logged over areas of conventional logging (CL) plots and reduced impact logging (RIL) plots in natural tropical forest was 301.60 Mg ha-1, 93.16 Mg ha-1 and 223.8 Mg ha-1, respectively. This research indicated that biomass on RIL plots larger than the CL plots. While the highest standing biomasses in this study are primary forests have not been disturbed due to activity of timber harvesting

Full Text: PDF     DOI: 10.15640/jaes.v4n2a8