泾河流域生态系统服务权衡/协同关系的尺度异质性研究

目的]探究泾河流域生态系统服务权衡/协同关系的尺度异质性，阐明权衡/协同关系在子流域尺度发生变化的主要原因，为黄土高原地区的生态保护和高质量发展提供科学参考。方法]利用SWAT模型、CASA模型、InVEST模型等量化粮食供给、土壤保持、产水、固碳、生境质量5种生态系统服务，并采用空间相关性统计方法从全流域和子流域两个尺度上进行生态系统服务及两两之间权衡/协同关系的尺度异质性研究。结果](1)泾河流域粮食供给服务在流域东南部较强；土壤保持服务在流域北部、中部较弱，在西南部、东南部较强；产水服务在流域西部、南部以及东南部较强，在北部、东北部及东部地区较弱；固碳服务流域南部强于北部，东部强于西部；生境质量以中值区和高值区为主，其高值区主要分布在流域东部、东南部及西部，低值区主要分布在建设用地。(2)从全流域尺度来看，粮食产量和土壤保持、产水量、NPP和生境质量以权衡关系为主；土壤保持和产水量、NPP和生境质量以协同关系为主；产水量和NPP是协同关系为主，和生境质量是权衡关系为主；NPP和生境质量是以协同关系为主。(3)泾河流域生态系统服务之间的权衡/协同关系在部分子流域发生改变，土地...

Scale Seterogeneity of Ecosystem Service Trade-offs/Synergies in the Jinghe River Basin

Objective] The scale heterogeneity of ecosystem service trade-offs/synergies in Jinghe River Basin was investigated, and the main reasons for the change of trade-offs/synergies at sub-basin scale were elucidated, which could provide scientific reference for ecological protection and high-quality development in the Loess Plateau. Methods] Soil and Water Assessment Tool(SWAT), Carnegie Ames-Stanford Approach(CASA)model, Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model were used to quantify five kinds of ecosystem services(food supply, soil conservation, water yield, carbon sequestration, and habitat quality), and spatial correlation statistical method was used to study the scale heterogeneity of ecosystem service trade-offs/synergies at the whole basin and sub-basin scales. Results](1)The food supply service in the Jinghe River Basin was stronger in the southeastern part of the basin. The soil conservation service was weaker in the northern and central parts of the basin, but stronger in the southwestern and southeastern parts of the basin. The water yield service was stronger in the western, southern and southeastern part of the basin, weaker in the north, northeast and eastern regions. The carbon sequestration service of the basin was stronger in the southern part than in the northern part, and in the eastern part than in the western part. The habitat quality was dominated by the median and high-value areas, and the high-value areas mainly distributed in the eastern part of the basin, southeast and west, low-value areas mainly distributed in construction land.(2)From the perspective of the whole basin scale, grain yield and soil conservation, water yield, NPP and habitat quality were mainly in trade-off relationship. Soil conservation and water yield, NPP and habitat quality were mainly in synergistic relationship. Water yield and NPP were mainly in synergistic relationship, and the trade-off relationship was the main one with the habitat quality. The NPP and the habitat quality were mainly based on the synergistic relationship.(3)The tradeoffs/synergies between ecosystem services in the Jinghe River Basin changed in some sub-basin, and land use change was the important reason for the changes in the tradeoffs/synergies. Conclusion] Land use change is the main reason for the scale difference of ecosystem service trade-offs/synergies in the Jinghe River Basin. The research on ecosystem service trade-offs/synergies at multiple scales should be strengthened in the future.