Estimations of total ecosystem carbon pools distribution and carbon biomass current annual increment of a moist tropical forest

摘要

a-[ordm Carbon pools of land uses and vegetation types of Campo-Ma'an are presented. a-[ordm Current annual increment (CAI) of carbon biomass of the study area has been estimated. a-[ordm A methodology and uncertainty related to biomass estimates have been developed. a-[ordm Human activities have impacts on carbon pools and CAI in managed and unmanaged forests. a-[ordm A carbon biomass map of Campo-Ma'an forest has been designed. With increasing CO2 in the atmosphere, there is an urgent need of reliable estimates of biomass and carbon pools in tropical forests, most especially in Africa where there is a serious lack of data. Information on current annual increment (CAI) of carbon biomass resulting from direct field measurements is crucial in this context, to know how forest ecosystems will affect the carbon cycle and also to validate eddy covariance flux measurements. Biomass data were collected from 25 plots of 13ha spread over the different vegetation types and land uses of a moist evergreen forest of 772,066ha in Cameroon. With site-specific allometric equations, we estimated biomass and aboveground and belowground carbon pools. We used GIS technology to develop a carbon biomass map of our study area. The CAI was estimated using the growth rates obtained from tree rings analysis. The carbon biomass was on average 264A plus or minus 48Mghaa degree 1. This estimate includes aboveground carbon, root carbon and soil organic carbon down to 30cm depth. This value varied from 231A plus or minus 45Mghaa degree 1 of carbon in Agro-Forests to 283A plus or minus 51Mghaa degree 1 of carbon in Managed Forests and to 278A plus or minus 56Mghaa degree 1 of carbon in National Park. The carbon CAI varied from 2.54A plus or minus 0.65Mghaa degree 1 yeara degree 1 in Agro-Forests to 2.79A plus or minus 0.72Mghaa degree 1 yeara degree 1 in Managed Forests and to 2.85A plus or minus 0.72Mghaa degree 1 yeara degree 1 in National Park. This study provides estimates of biomass, carbon pools and CAI of carbon biomass from a forest landscape in Cameroon as well as an appropriate methodology to estimate these components and the related uncertainty.