基于当量因子法的黄河青海流域生态系统服务价值评估

Value assessment of ecosystem services in the Qinghai Basin of Yellow River based on the equivalence factor method

黄河青海流域是我国重要的生态安全屏障,在黄河流域生态保护和高质量发展战略中有着不可替代的战略地位.本研究基于当量因子法得出2020年黄河青海流域生态系统服务价值达1866.99亿元.按不同土地利用类型区分,草地生态系统服务价值最大,占50%以上,其余依次为湿地>水域>森林>耕地>荒漠/裸地.按不同生态系统服务区分,黄河青海流域在调节服务方面产生的价值最高,占总价值的68.81%,其次为支持服务与供给服务,占比约占总价值的20%.按生态系统服务小类分,生态价值最高的为水文调节,水文调节方面产生的价值最大,占总服务价值的34.14%,其余依次为气候调节、生物多样性、土壤保持、净化环境、气体调节、美学景观等.

Ecosystem services have extremely high or even immeasurable value and are closely related[JP2]to human well-being.The Qinghai Basin of Yellow River are important ecological security barriers in China,playing an irreplaceable strategic role in ecological protection and high-quality development strategies in the Yellow River Basin.This study is based on the value equivalent factor method and concludes that the ecosystem service value of the Qinghai Basin of Yellow River reached 186.699 billion yuan in 2020.According to different land use types,grassland ecosystem services have the highest value,accounting for over 50%,The rest are in the following order:wetlands>water bodies>forests>cultivated land>desert,and bare land.According to different ecosystem services,the Qinghai Basin of Yellow River have the highest value in regulating services,accounting for 68.81%of the total value.Among them,hydrological regulation has the highest value,accounting for 34.14%of the total service value,followed by support and supply services,accounting for about 20%of the total value.According to the subcategories of ecosystem services,hydrological regulation has the highest ecological value,next is climate regulation,biodiversity,soil conservation,environmental purification,gas regulation,and aesthetic landscape.