Spatial Differential Features And Prediction Of Forest Carbon Storage In Nanping Area

Forest ecosystem was one of the most important terrestrial ecosystem, it played anirreplaceable role in balancing the global carbon budget and mitigating negative impact of globalclimate change. Based on the inventory data of forest resource inventory and references relevantto them, this paper used volume-biomass to estimate forest carbon and carbon density and itsdynamic changed in Nanping Area, and used GIS technology to draw the carbon density spatialdistribution map, the techniques of the regionalized forest carbon management were put forwardbased on the spatial differentiation of carbon density and stock in the forest. The major resultswere summarized as follows:Carbon density in the forest ecosystem had clear spatial differentiation with the zonalities oflongitude, latitude and altitude in Nanping Area. Meanwhile, carbon density decreased withaltitude, and increased with the latitude; carbon stock increased with altitude at0-800m, and thendecrease with the altitude; carbon stock changed with slope as normal distribution, carbon densityincreased with slope from flat slop to acute slope, and then decreased.The total forest carbon stock had increased by44.43×10⁵MgC from1996to2006with theaverage forest growth rate of6.81%, which converted to the annual increment of4.43×10⁵MgC,forest area increasing of2.86%while biomass carbon density increasing1.32MgC·hm^-2. Carbonstock of hard wood forest were declined, Chinese fir and masson pine were increased. Protectedforest carbon stock were increased, timber and special purposed forest area and carbon stock werereduced. The young and middle-age forest carbon stock and density were declined, pre-mature,mature and over-mature forest carbon and density were increased. The proportion of carbonstorage in the young and middle-age forest was declining, while it was increasing in mature andover-mature forest. During this period, forestry land area and forest area were increased, and theforest coverage rate had increased by9.66%.A logical relationship between forest carbon stock and carbon density was created, the forestcarbon stock was projected to2020that based on the logical relationship had increased by83.78×10⁵MgC with carbon density increased4.02MgC·hm^-2, the average forest growth rate of0.96%. The increased carbon stock value in plantation forest was3.66times of the value in naturalforest, with the increased carbon density value in plantation forest was3.14times of the value innatural forest.