Study On The Evolution And Vulnerability Of Ecological Environment In Shennongjia,China

Shennongjia District is the most important ecological function zone and ecological vulnerability zone in China,which has attracted much attention due to its superior natural ecological endowment.With the continuous deepening of regional economic and social development,the ecological environment is strongly disturbed by human activities,showing great volatility in space and time,and vulnerability problems continue to emerge.Based on the background of national park construction,this study takes Shennongjia District as the research object,comprehensively uses multidisciplinary basic theories,and based on 3S and other related technologies,from the perspective of time and space,analyzes the change characteristics of landscape pattern and typical environmental factors in Shennongjia District from 1996 to 2018.Based on the above analysis,the ecological vulnerability evaluation system of Shennongjia District was constructed,and the spatial and temporal evolution of vulnerability was studied by spatial principal component analysis.Finally,the strategies of ecological environment protection and restoration and regional sustainable development model are proposed to improve the quality of regional landscape and environment,and provide scientific basis and theoretical support for the future national park system construction.The main achievements are as follows:(1)From 1996 to 2018,the ecological environment of Shennongjia District has changed significantly,and the landscape pattern tends to integrate and local fragmentation is aggravating.Typical environmental factors reflect the good trend of ecological stability.(2)The evolution of ecological environment in Shennongjia District is the result of the interaction between human activities and natural environment,and human factors are the main driving force in a relatively short time scale.(3)From 1996 to 2018,the ecological vulnerability of Shennongjia District is in a mild vulnerability as a whole,and the risk of extreme vulnerability in some areas is gradually emerging,and the ecological vulnerability is in a polarization.(4)The formation and development of ecological vulnerability in Shennongjia District is a dynamic process.The types of land use types,population density and vegetation coverage are the main driving factors of ecological vulnerability evolution.(5)There is a high level of coupling coordination between ecological vulnerability and landscape pattern.(6)The optimization of landscape ecological pattern and the promotion of ecological classification and zoning are the main strategies of ecological environment protection in Shennongjia District.