[Response of Ecosystem Service to Land Use Function Evolution Along the Yellow River Basin]

The evolution of land use functions profoundly influences the changes in ecosystem services. To explore the impact of land use functions on ecosystem service value （ESV）， this study took 69 prefecture-level cities along the Yellow River Basin from 2000 to 2022 as the research area. Employing methods such as the land use function transition matrix， trade-off and synergy relationships， and sensitivity analysis， the spatiotemporal evolution of land use functions and the gain-loss and response of ESV were examined. The results show that： ① Over the past 22 years， the land use types along the Yellow River Basin have shown a significant expansion of construction land and a reduction in the area of farmland and grassland. The most prominent feature of the evolution of land use functions was the reduction of production-ecological functions and the significant increase in land for living-production functions. The former had the largest transfer area， and its transfer speed was much higher than its new addition speed. By 2022， it had a net reduction of 29 708.18 km². The latter had a new addition speed greater than the transfer speed， with a net increase of 19 770.83 km². ② During the study period， the ESV along the Yellow River Basin increased by 124 956 billion yuan. Among them， forests， which represent ecological functions， and waters， which represent ecological production functions， made the greatest contributions to ESV. Hydrological regulation， climate regulation， and soil conservation were the most important types of ecosystem services along the Yellow River Basin， and different type of ecosystem services were mainly in a synergistic relationship. ③ The response degree of ESV to the evolution of different land use functions along the Yellow River Basin had significant heterogeneity. The transformation of ecological functions into ecological production functions had the greatest contribution rate to the increase of ESV， reaching 101.78%. The transformation of production-ecological functions into living-production functions had the highest contribution to the decrease of ESV， reaching 37.81%. The research results have certain decision-making reference value for the sustainable utilization of land resources and the optimization of the ecological security pattern along the Yellow River Basin.