Study On Ecosystem Service Function And Value Of Mulinzi National Nature Reserve

This study takes Hubei Mulinzi National Nature Reserve in the subtropical evergreen deciduous broad-leaved mixed forest in Western Hubei as the research area,combining with the field survey data and meteorological data,remote sensing data in2020,using in InVEST model,Arc GIS 10.6 research on ecosystem service function,as a reference of reserve policy formulation and implementation,It is of great significance to the sustainable development of forest resources and the construction of regional ecological civilization in southwest Hubei province.The main results are as follows:（1）In terms of matter quality,the supply of forest products to the ecosystem of Hubei Mulinzi National Nature Reserve in 2020 was 17.30 million m~3;The water yield is 207.25 million m~3,and the water yield per unit area is 994.58mm;Soil conservation was 280686147.23 t,and soil conservation per unit area was 13469.91t/hm~2.The carbon storage is 2535838.14 t,and the carbon storage per unit area is121.69 t/hm~2.（2）In terms of value,the total ecosystem service value of Hubei Mulinzi National Nature Reserve in 2020 was 71114.64 million yuan.The four types of service value were soil conservation service value>carbon storage service value>water production service value>forest product supply value.The service value of water production per unit area is 11.88 yuan/m~2,soil conservation per unit area is314.75 yuan/m~2,and carbon storage per unit area is 14.6 yuan/m~2.（3）Among the different land use types in Hubei Mulinzi National Nature Reserve,grassland land use type had the highest water production capacity,and forest soil conservation capacity and carbon storage per unit area were the highest.Further compare the value of five functional indicators of water purification,water regulation,soil consolidation,soil fertilizer conservation and carbon storage of water production service,soil conservation service and carbon storage service,the forest land use types from low to high are water purification value,water regulation value,carbon storage value,soil consolidation value,soil fertilizer conservation value;the order of ecosystem function value of grassland and farmland land use types from small to large is:water purification value,carbon storage value,water regulation value,soil consolidation value and soil fertilizer conservation value.（4）Further analysis of the relationship among water yield services,soil conservation services,carbon storage services and habitat maintenance services shows that:there is a significant positive correlation between soil conservation services and habitat maintenance services,and between carbon storage services and habitat maintenance services,the synergistic relationship between soil conservation and carbon storage services is not obvious.There was a significant negative correlation between water yield services and habitat maintenance services,and between water yield services and carbon storage services.