| Forest ecosystems are the main part of terrestrial ecosystems,it plays an invaluable role in maintaining the global carbon balance, ecological stability and mitigating global warming,forest carbon storage and carbon density are the basis for evaluating the contribution of the carbon cycle, studying the spatial distribution characteristics, trends and changes has great significance for understanding the global carbon balance. In this paper, based on Wuzhishan2010Forest Resource Inventory data and1993,1998,2003,2008four of a kind inventory data, using the method of biomass conversion factor continuous function estimates wuzhishan forest vegetation carbon reserves,by means of geography information systems technology to analyze the spatial distribution and trends, and use of carbon sinks reforestation cost method to estimate the economic value. The result indicates that:Wuzhishan total area is116054.7766hm2in2010, total carbon storage is6060938.32t, about6.1Tg, the average carbon density of the city is52.22t/hm2, total carbon sequestration value is16.5645million yuan, combineing the status quo of forest resources in the area, the carbon sink function along with time going will have greater economic benefits of carbon sequestration.The forest carbon stocks forest of township, farms and nature reserves is not proportional to the size, about50%forest carbon stocks i of the city distributes Chong Shan Town,Chang Hao Township,Mao Yang Town and Fan Yang Town (excluding Yinggeling) minimum, accounting for only4.16%; carbon density followeing by size is Wuzhishan national Nature> Tong Shen Forest Farm> Chang Hao Township> Mao Rui Forest Farm> Chang Hao farm> Fan Yang Town (Yinggeling)> Mao Yang Town (Yinggeling)> Chong Shan Town> Shui Man Township> Nan Sheng Town> Mao Dao Township> Fan Yang Town> Mao Yang Town.Tree forest carbon storage Distribution rule:water conservation forest> Soil and Water Conservation forest> Conservation forest> forest chemical raw material forest> General timber> short rotation timber> national defense forest> fruit trees> medicinal forest> edible raw material forest; broadleaf mixed forest> tropical forest> weed forest> Song category> eucalyptus forest> Chinese fir forest> camphor forest; natural forest> plantation forest; middle-aged forest> mature forest> nearly mature forest> young forest> mature forest; dense canopy> the canopy density> sparse canopy; naturalness II> I> III> IV> V.Tree forest carbon density distribution rule:Soil and Water Conservation forest> National Defense Forest> Water Conservation Forest> Conservation forest> General timber> Lin chemical raw material forest> short rotation timber> medicinal forest> fruit trees> edible raw material forest; camphor forest> weed forest> broadleaf mixed forest> Song category> Chinese fir forest> tropical forest> eucalyptus forests; natural forest> plantation forest; mature forest> near mature forest> mature forest> middle-aged forest> young forest; dense canopy> the canopy density> sparse canopy; naturalness â…¡> â… > â…¢> â…£> â…¤.Between1993-2008, Wuzhishan overall distribution trend of forest carbon stock showed natural succession→natural succession based, supplemented by human disturbance succession→human disturbance succession→human disturbance succession based, supplemented by natural succession; Carbon reserves change trend are excellent→Good→Poor→Good, With the strengthening of people ecological awareness and implementation of the various forestry projects in Hainan Province, Wuzhishan forest carbon stock will gradually showing positive trends. |
