食物供给视角下黑河流域中下游生态系统服务间的关系

The relationship among ecosystem services in the middle and lower reaches of Heihe River Basin from the perspective of food supply

黑河流域中下游是河西走廊的重要食物供给区,其食物供给功能变化对流域生态建设及经济社会健康发展具有重要影响。基于食物供给视角,对2000—2018年黑河流域中下游地区产水、土壤保持、植被固碳和食物供给等生态系统服务进行测算,探讨彼此之间的权衡协同关系,并进行食物供给服务热点区划分,从而提出提升食物供给功能的建议。结果表明:2000—2018年研究区产水能力下降,但土壤保持、植被固碳和食物供给能力上升;不同土地利用类型条件下生态系统服务间关系不同,但总体为协同关系;食物供给服务第4类热点区面积最大,研究期间热点区结构得到一定优化,且不同热点区生态系统服务间关系差异明显。研究结果对揭示黑河流域食物供给区生态系统服务间关系、提升区域食物供给能力具有重要作用。

The middle and lower reaches of Heihe River Basin are important food-producing areas in Hexi Corridor,and the change of its food supply function has an important impact on the ecological construction and the healthy economic and social development of the basin.Based on the perspective of food supply,the ecosystem services such as water production,soil conservation,vegetation carbon sequestration and food supply in the middle and lower reaches of Heihe River Basin from 2000 to 2018 were calculated,the trade-off and synergy among them were discussed,the hot spots of food supply services were divided,and suggestions to improve the function of food supply were put forward.The results showed that the water production capacity was decreased from 2000 to 2018,but the soil conservation,carbon sequestration of vegetation and food supply capacity were increased.The relationship between ecosystem services is different in different land use types,but it is generally synergistic.The hot spot analysis showed that the fourth hot spots of food supply services occupy the largest area.The structure of hot spots has been optimized during the research,and the relationship between ecosystem services in different hot spots is obviously different.The research results play an important role in revealing the relationship between ecosystem services in the food supply area of Heihe River Basin and could improve the regional food supply capacity.