Study On Ecosystem Service Function Of Nature Reserve In Xinshao County,Hunan Province

Ecosystem is the material basis for human survival and development and the material guarantee for national economic and social development.The establishment of nature reserves is an important measure to protect the ecological environment and natural resources.Nature reserves have played a very important role in improving the ecological environment,protecting biodiversity,preserving natural heritage and maintaining ecological security.The construction of nature reserves has become one of the standards to measure the progress and civilized development of a country.The quantitative analysis of the ecosystem service function of nature reserves will be of great significance to the construction of ecological environment,the rational utilization of natural resources and the sustainable development of social economy.This study takes three nature reserves in Xinshao County,Hunan Province as the research object,taking land use,soil and DEM data as the cut-off point,this study comprehensively uses ArcGIS and invest model to quantitatively analyze the ecosystem service function of the nature reserve,and uses standard deviation method to evaluate the importance of the ecosystem service function of the nature reserve,the research results can provide scientific reference value for the construction and development of nature reserves.The main research contents and conclusions are as follows:(1)Quantitative analysis of carbon storage function of nature reserves.Through the quantitative analysis of invest model,the total carbon reserves of the three reserves are 565908.386t,including 65137.73t in Xiaoxi National Wetland Park,310379.3215t in baishuidong National Geological Park and 190391.3369t in yuepingfeng National Forest Park;In terms of land use types,arbor forest land accounts for the largest proportion of carbon reserves,accounting for 96.5%of the total carbon reserves.(2)Quantitative analysis of water conservation function of nature reserves.The spatial distribution of water conservation is mainly represented by the distribution structure of"high in the west,low in the east and medium in the east",which is "high in Baishuidong National Geopark,second in Yuepingfeng National Forest Park,and low in Xiaoxi National Wetland Park".The water conservation values are 34604.1432 × 104m3、20384.392 ×104m3、14463.2088 × 104m3 respectively.In terms of land use types,arbor forest land has the strongest water conservation function,56837.1576 × 104m3.(3)Quantitative analysis of soil conservation function in nature reserve.The soil conservation function is mainly reflected by the amount of soil erosion.The amount of soil erosion in baishuidong National Geological Park is 111786.96t,that in Xiaoxi National Wetland Park is 103460.16t,and that in yuepingfeng National Forest Park is 70359.76t,the soil erosion amount of the three protected areas showed a spatial distribution structure of"high in the west,low in the east and medium in the east",which is "high in Baishuidong National Geopark,second in Xiaoxi National Wetland Park,and low in Yuepingfeng National Forest Park";From the perspective of land use type,the soil conservation function of arbor forest land is the strongest,and its soil erosion per unit area is 17.56t/ha.The soil conservation function of water area is the weakest,and its soil erosion per unit area is 247.65t/ha.(4)Quantitative analysis of habitat quality of nature reserves.The high value areas of habitat quality of Xinshao Nature Reserve in Hunan Province are mainly distributed in yuepingfeng National Forest Park,with a total average habitat index of 0.975,and the low value areas are mainly distributed in Xiaoxi National Wetland Park,with a total average habitat index of 0.904,with no significant difference in spatial distribution;In terms of land use types,the average habitat index of forest land is the highest and the average habitat quality index of construction land is the lowest.(5)Evaluation of the importance of ecosystem services in nature reserves.The ecosystem service function of Xinshao Nature Reserve in Hunan Province is divided into general important areas,important areas and extremely important areas.Yuepingfeng National Forest Park has the largest proportion of important areas,followed by extremely important areas and the smallest proportion of general important areas.The area proportion of general important areas,important areas and extremely important areas of Xiaoxi National Wetland Park is roughly the same.Baishuidong National Geopark has the largest proportion of important areas,and the proportion of general important areas and extremely important areas is roughly the same.The classification and evaluation of the importance of ecosystem service function of protected areas can provide reference for the sustainable development of protected areas.