Study on spatio-temporal evolution of habitat quality based on land-use change in Chongming Dongtan, China

Chongming Dongtan is an important habitat for international migratory birds. It of great significance to study its land use and quality change rare waterfowl protection ecological environment restoration. Based on the data in 2002, 2008, 2012, 2016 2020, this paper analyzes relationship between land-use evolution recent 18 years using InVEST model, dynamic degree index. The results show that main types area are water cultivated land, followed by woodland, reed beach, grass bare beach construction land. Among them, have changed dramatically, former continuing decrease while latter increase. Moreover, increasing speed began slow down after part was mainly from surrounding Second, terms time change, degradation has been gradually improved aggravating trend past years. In spatial distribution, higher east lower west, spreading center surrounding. this, interference human activities reasons quality.