Maintaining ecological health in Dongting Lake area is of great significance to regional sustainable development.However,with the disordered expansion of urban space,ecological security is facing a great threat.Based on the expansion rate index,expansion intensity index and remote sensing ecological index(RSEI),this paper analyzed the spatio-temporal changes of urban space and eco-environmental quality in Dongting Lake area from 2010 to 2020,and explored the impact of urban space evolution on eco-environmental quality through exponential regression model.The results show that:(1)From 2010 to 2...