[Response of Land Use Change to Ecological Environment Effect in Anhui Province Under Urban Expansion]

The dynamic alterations in land utilization patterns within swiftly urbanizing regions significantly influence the ecological environmental quality. Investigating these land use transformations and their implications for ecological integrity can furnish essential theoretical underpinnings and a foundation for decision-making aimed at fostering sustainable and high-quality growth in rapidly urbanizing areas. Anhui Province was chosen as the research locale， with CLCD data （1990-2020） employed to delineate land use modifications. Concurrently， a remote sensing ecological index （RSEI） was developed utilizing MODIS remote sensing satellite data to examine the interplay between land use transitions and ecological environmental quality responses during the period of accelerated urban expansion from 2000 to 2020. The findings indicate that： ① Amidst rapid urbanization， the expanse of construction land in the Anhui Province exhibited an ascending trajectory over the three-decade interval from 1990 to 2020， with the land use transformation schema predominantly marked by early-stage and late-stage alterations. The composite index of land use intensity across various cities manifested a declining trend. ② The overall ecological environmental quality in the Anhui Province progressively enhanced， with the extent of the ecological enhancement zone surpassing that of the ecological deterioration zone. ③ The enhancement or deterioration of ecological environmental quality was intimately correlated with variations in regional land use categories， demonstrating pronounced spatial heterogeneity. ④ The outcomes of single-factor analysis revealed that land use modifications in the Anhui Province were predominantly swayed by socio-economic dynamics. Interactive factor analysis suggested that the synergy between natural and socio-economic factors yielded effects of superposition or mutual reinforcement. This study underscores that a judicious realignment of land use structures is instrumental in preserving or even enhancing regional ecological environmental quality. The prudent exploitation and utilization of land resources should weigh both natural and socio-economic factors， with particular emphasis on the pivotal role of socio-economic factors in the metamorphosis and evolution of land use.