Landscape Ecological Risk Assessment of Nanjing Metropolitan Areabased on Land Use
The Nanjing Metropolitan Area is the first urban development planning area approved by the state.It is of great significance to evaluate its ecological risk for regional good-quality development.In this study,land use data from 1990,2000,2010 and 2020 were used to analyze the characteristics of land use change in Nanjing Metropolitan area.Combined with ecological risk index and spatial autocor-relation analysis methods,the spatiotemporal differentiation characteristics and spatial correlation of landscape ecological risk in Nanjing Metropolitan area from 1990 to 2020 were analyzed.The results show that:(1)From 1990 to 2020,the construction land in Nanjing Metropolitan Area will grow rap-idly and on a large scale,mainly derived from cultivated land.(2)From 1990 to 2020,the number of cultivated land patches in Nanjing Metropolitan Area was the highest,and their distribution tended to be fragmented;The construction land gradually expands from concentrated areas to larger aggregates,and the internal stability is increasing year by year.(3)The ecological risk levels of Nanjing Metropoli-tan Area are mainly low,medium and high,with significant spatial distribution differences among re-gions with different ecological risk levels.The ecological risk value was positively correlated in space,and gradually decreasing from the Yangtze River,rivers and lakes to the surrounding areas,and showed a clustering effect in adjacent areas.The research results can provide scientific basis for regional ecological safety management and sustainable development,and provide technical support for Ecological protection and Healthy urban development of the Yangtze River Economic Belt.
land useecological riskNanjing metropolitan arealandscape indices
NETL
NSTL
万方数据
