Abstract: In order to reveal the spatial and temporal changes of the coupling and coordination between ecosystem service and farmers' livelihood in the Yellow River water supply area of Gannan,this study,based on the data from 1999 to 2020,used the equivalent factor method to evaluate the value of ecosystem services. The evaluation system of ecosystem service with farmers' livelihood was constructed. On this basis,entropy method and coupling model were introduced to analyze the spatio-temporal coupling between ecosystem service and farmers' livelihood. The results showed that:The overall value of ecosystem service presented a slight increase,showing a “decrease-increase” pattern of the change. Among them,the value of regulation service was the largest,and the value of cultural service the smallest. The farmers' livelihood capital has been continuously improved,with the most obvious increase in material capital and financial capital,which provided a strong support for the improvement of farmers' livelihood level. However,the composite index of human capital and natural capital had only 2.49% and 4.193%,which was the biggest weakness restricting the improvement of farmers' livelihood capacity. The coupling degree of the two systems was in an extremely coupled state and showed a trend of “increasing first and then decreasing”. Diversification of farmers' livelihood capital could effectively alleviate the pressure to the ecosystem. The overall degree of coupling coordination has gone through four stages:mild imbalance,near imbalance,barely coordination,primary coordination,and the trend of change was improving. The value of ecosystem service and the livelihood capital of farmers were constantly evolving in the direction of “coordinated development”. Therefore,suggest improving the value of ecosystem service in the supply area,and efforts should be made to consolidate natural and human capital to promote the coordinated development of regional ecological environment and farmers' livelihood.

Key words: Gannan Yellow River water supply area, Ecosystem service, Farmers’ livelihood, Coupling coordination

摘要： 为揭示甘南黄河水源补给区生态系统服务与农户生计耦合协调时空变迁规律，本研究基于1999—2020年数据资料，采用当量因子法评估生态系统服务价值，构建生态系统服务与农户生计评价体系，运用熵值法、耦合协调度模型测度两者的耦合协调发展状况。结果表明：生态系统服务价值整体表现为小幅增长，其中调节服务价值最大，文化服务价值最小。农户生计资本不断提升，物质资本和金融资本增幅最大，是农户生计能力提升的重要支撑。两系统耦合度呈极度耦合状态并呈“先升后降”趋势，农户生计资本多元化可有效减缓生态系统压力；耦合协调度总体经历轻度失调、濒临失调、勉强协调、初级协调四阶段，变迁态势趋好。因此，建议提升补给区生态系统的服务价值，着力夯实自然资本和人力资本，以期促进区域生态环境与农户生计协调发展。

关键词: 甘南黄河水源补给区, 生态系统服务, 农户生计, 耦合协调