Study On The Relationship Between Forest Ecosystem Vulnerability And Forest Carbon Storage In Xinhua County

Xinhua County is known as "Hunan treasure land" and the forest, richness of tourism resources, taste and development conditions of living in the forefront of the province.Carrying out study on correlation between forest ecological fragile and forest carbon storage in Xinhua County, not only protecting the ecological environment of Xinhua County and having important practical significance to the development of the use of forest resources, but also having reference value and guiding significance to sustainable development of environmental management and evolution, resource reasonable configuration and coordinated social and economic of Xinhua County, being conducive to government timely and effectively change the existing resources to respond, and formulate a scientific and rational coping scheme, so as to better serve the Xinhua County society, environment and economy coordinated development to contribute.This study in Xinhua County forest ecological environment and forest resources as the research object, based on 2014 Xinhua County forest resource second class survey data, with ArcGIS spatial analysis, SPSS principal component analysis and Kriging interpolation method, in Xinhua County forest ecological environment fragile in for comprehensive evaluation and estimate its forest carbon reserves, and in Xinhua County forest ecological fragile and carbon storage of correlation analysis.The result indicates that:(1)According to the system, dominated by six principles, this study ultimately selected slope aspect, slope position, such as eight ecological sensitivity index and patch density and mean proximity index five landscape pattern index Xinhua County forest ecological fragile of evaluation index system is established;Using ArcGIS re classification to determine the weight of each ecological sensitivity index obtained: slope position> age group> canopy> more> altitude> slope> Gradient> soil types;with the help of ArcGIS weighted superposition, Xinhua County forest ecological sensitivity of spatial distribution trend:Northwest, West, southwest high, central, Eastern and southeast low and the sequence in which the different grades of area of ecological for:moderately sensitive area> highly sensitive area> light sensitive areas> insensitive area> the extremely sensitive area.(2)Using SPSS and Fragstats determine the weight of each ecological vulnerability index, and the index of patch density, connectivity index, separation index and index of aggregation index were obtained;Based on spatial principal component analysis calculation of different landscape types of ecological fragile index shows:shrubs economic forest> arbor economic forest> shrubs forest> bamboo> broadleaved forest> coniferous forest, shrub economic forest and trees of economic forest ecology fragile highest, mainly result from human disturbances;Get the fragile ecological spatial distribution trend of North and southwest lower using ArcGIS fishnet tools and Kriging interpolation method, high in the East and Southeast, mainly with vegetation type, altitude and regional particularity. (3)Using biomass conversion factor function to calculate the different forest carbon storage and carbon density and carbon storage of the tree species in the size of the order:Chinese fir group> Pinus massoniana group> bamboo> group cypress group> slow growing broad-leaved tree group> broadleaf tree group> shrub> Group Foreign pine group> fruit group> fast-growing broad-leaved tree group> edible raw materials species group> medicinal species group> poplar> raw material forest species group;The size of the sort of various species of carbon density: broadleaf tree group> fast-growing broad-leaved tree group> cypress> foreign pine group> bamboo> group poplar group> Cunninghamia lanceolata group> slow growing broadleaf tree group> Pinus massoniana group> fruit = edible raw materials species= forest chemical raw material species group> shrubs group> medicinal species group, and different tree for the group itself characteristic and growth environment of a relationship.(4)Analysing different grades of fragile area of carbon storage and carbon density contrast, finding that different vulnerable for the ordering of the carbon storage zone, moderate vulnerable area> slightly vulnerable area> micro vulnerability area> extremely vulnerable area> highly vulnerable area, and different vulnerable area and human activities is related;The carbon density of the different vulnerable areas is sorted as:the degree of vulnerability of the vulnerable area> mild to moderate vulnerability> highly vulnerable zone> extreme vulnerability area, and the vegetation types of different vulnerable areas and the artificial operation and management.