Haruni Krisnawati, Wahyu Catur Adinugroho and Rinaldi Imanuddin
(Forestry Research and Development Agency (FORDA), Jl. Gunung Batu No 5 Bogor, Indonesia)
Many studies on aboveground living biomass and carbon stock in tropical forests have been carried, either measured directly based on destructive sampling in experimental plots or estimated based on forest inventory data. However, most of these studies focused on the estimation of forest biomass and carbon stock at one occasion. Forest biomass and carbon stock may be dynamic and changes occur continuously throughout time due to loss of carbon during deforestation and forest degradation as well as accumulation of carbon during re-growth of forests. This study aimed to estimate the dynamic of aboveground biomass and carbon stock in peat swamp forest in Jambi, Indonesia. Inventory data collected from sixteen Permanent Sample Plots (100 m x 100 m each) which have been selectively logged and measured annually for 5 years were used to estimate the dynamics of aboveground biomass and carbon stock of the peat swamp forest. All woody plants of at least 10 cm dbh were identified for species and measured for both dbh and total tree height. The dead and newly recruited trees were recorded at each measurement time. Overall, the aboveground biomass of all species in the plots increased between 2.4 and 4.6% of the initial value. The same trends were also observed for each plot for aboveground carbon stock. Aboveground carbon stock in peat swamp forest is dynamic. The mean annual increment is about 3.27 Mg C ha-1 yr-1. The increases may be attributed to the high rate of recruitment and growth of some species. There was a significant logarithmic relationship between the aboveground biomass (and carbon stock) and its annual growth. This relationship could be applied to the inventory data to estimate the biomass and carbon stock changes.
(Presented on JST -JICA International Symposium on Wild Fire and Carbon Management in Peat -Forest in Indonesia Forest in Indonesia Forest in Indonesia Forest in Indonesia Forest in Indonesia Forest in Indonesia Forest in Indonesia Forest in Indonesia, 13-14 September 2012, Bogor.)