金沙江下游梯级水电工程库区生态系统服务价值演化及权衡协同关系

Evolution and Tradeoff/Synergy Relationship of Ecosystem Services Value in Cascade Hydropower Project Reservoir Area of the Lower Reaches of Jinsha River

基于生态系统服务变化指数、相关分析及空间自相关等方法,对金沙江下游梯级水电工程库区2005—2018年生态系统服务价值进行定量分析,探索库区生态系统服务权衡协同关系的时空演变规律。结果表明:(1)2018年库区生态系统服务价值达到940亿元,研究期间生态系统服务价值总量增加42亿元。(2)库区生态系统服务价值空间分布较为稳定,呈现南高北低格局,空间相关类型均为正相关,生态系统服务价值增益地区集聚于金沙江沿岸。(3)库区生态系统支持服务与供给、调节、文化服务之间表现为权衡关系,供给、调节、文化服务两两之间表现为协同关系,各乡镇生态系统服务的相关关系以协同关系为主。研究结果进一步证明水电工程的实施能改善库区生态系统服务功能,为库区环境保护和土地资源可持续利用提供技术支撑。

Based on the change index of ecosystem services,correlation analysis and spatial autocorrelation,this paper quantitatively analyzed the value of ecosystem services in the reservoir area from 2005 to 2018 and explored the spatio-temporal evolution of the synergy relationship of ecosystem services in the reservoir area.The results show that:(1)The ecosystem services value in the reservoir area reached to 94 billion yuan in 2018,with an increase of 4.2 billion yuan during the study period from 2005 to 2018.(2)The spatial distribution of ecosystem service value in the reservoir area is stable,showing a pattern of high in the south and low in the north,and the spatial correlation types are all positively correlated.The increasing areas of ecosystem services value are concentrated on the riparian zone of Jinsha River.(3)Supporting services of the ecosystem services value in the reservoir area has a tradeoff relationship with provisioning services,regulating services and cultural services,and the relationships between provisioning services,regulating services and cultural services are all synergistic,and the correlation of ecosystem services between the townships is mainly synergistic.The results further prove that the implementation of hydropower projects can improve the ecosystem service function of the reservoir area and provide technical support for environmental protection and sustainable utilization of land resources in the reservoir area.