关键词: 生境质量;城市化;InVEST模型;耦合模型;长三角城市群;

Abstract: Urbanization is a tangible manifestation of the impact of human activities on nature.Excessive urbanization will cause irreversible damage to the ecological environment, resulting in the decline of habitat quality, and it is urgent to regulate the coupling and coordination between habitat quality and urbanization.Taking the Yangtze River Delta(YRD) urban agglomeration as an example, we adopt the InVEST model to analyze the habitat quality of the YRD urban agglomeration from 2000 to 2020 and explore its spatial-temporal distribution and change trends.We conduct a cold-hot spot analysis between the habitat quality and the degree of urbanization at the county and district scales, and finally, it explores the interactive coupling relationship between habitat quality and the degree of urbanization utilizing the coupling and decoupling model.The results showed that the habitat quality of the Yangtze River Delta urban agglomeration from 2000 to 2020 showed a medium-low-high distribution from north to south with a deteriorating trend, but the overall habitat quality was still at an average level, in which the largest proportion of the type of change was poor-poor, with a proportion of 7.429%.On the county and district scales, the hotspots of habitat quality were located in the south, the cold spots were located in the central part of the country, and the number of counties with declining habitat quality increased from 54 to 127,and the trend of habitat quality deterioration was obvious.From 2000 to 2020,the number of urbanization hotspots increased rapidly, the overall level of urbanization increased rapidly, and the regional differences were gradually larger.The average coupling coordination degree of the YRD urban agglomerations was between 0.7 and 0.8,although there were some fluctuations, it was still in a state of basic coordination.The degree of decoupling increased gradually, strong negative coupling and weak coupling dominated.The trend of habitat quality deterioration was serious.

Key words: habitat quality; urbanization; InVEST model; coupling model; Yangtze River Delta Urban Agglomeration;