黄河上游甘南段生态系统服务价值估算

Study on the Ecosystem Service Value of the Upper Yellow River in Gannan Area

黄河上游甘南段具有涵养水源、净化环境、维持生物多样性等生态系统服务功能,根据甘南生态系统特点,采用Costanza提出的生态系统服务价值的评估研究方法,利用Landsat TM遥感影像数据对2000年、2005年、2010年的生态系统服务价值进行估算,结果表明:2005年甘南生态系统服务价值与2000年相比损失640万美元,随着生态恢复与重建工作的开展,2010年生态系统服务价值比2005年上升4 549万美元;2000年甘南生态系统服务价值是同期国内生产总值的8.47倍,远高于经济产品的价值。巨大的生态系统服务价值是经济社会可持续发展的物质基础,环境保护是维护和提升生态系统服务价值的重要途径。

The Gannan ecosystem of the upstream Yellow River has several service functions, such as water conservation, environmental purification and keeping biodiversity. According to the characteristics in ecological systems of Gannan area, the paper used the evaluation method proposed by Costanza and the date of Landsat TM, calculated the ecosystem service value of the upstream Yellow River in Gannan area. The results show that the ecosystem service function total value is less 6.4 million US dollars in 2005 than that in 2000, with ecological restoration and rebuilding, the ecosystem service value in 2010 increases to 45.49 million US dollars than that in 2005, the ecosystem service value in 2000 is 8.47 times of the Gannan GDP of the same period, far above the value of economic products. The paper points out that the great value of ecosystem services is the material basis of sustainable economic and social development and environmental protection is an important way to maintain and enhance the value of ecosystem services.