摘要
运用环境经济学的方法,借助GIS技术,根据秦岭山地自然地理特点,对秦岭山地生态系统分南、北坡对其植被有机物生产、保持土壤、涵养水源、固定二氧化碳、释放氧气及净化环境6种生态服务功能价值进行研究。结果表明:①秦岭山地6种生态服务功能总价值为1014 45亿元/a,其中,北坡为228 63亿元/a,南坡为785 82亿元/a。②南、北坡生态系统单位面积生态服务功能价值存在一定的差异,北坡生态系统单位面积生态服务功能价值高于南坡,但因南坡面积远大于北坡,故南坡生态系统对整体生态系统的服务功能价值贡献较北坡大。③南、北两坡植被在保持土壤、固定二氧化碳、涵养水源等方面都起着重要的作用。提出了生态服务功能价值空间分级方案和保护生态系统的建议。
The paper studies 6 service functional values of ecology of organic compound production, soil conservation, water source conservation, carbon dioxide fixation, oxygen release and environment purification of vegetation on the southern and northern slopes of ecosystem of Qinling mountainous area according to the characteristics of natural geography of the area and by utilizing the method of environmental economics and GIS technology. The results shown that a) the total value of the 6 service functional values of ecology of the area is 101.445 billion Yuan/a, of which, northern slope 22.863 billion Yuan/a and southern slope 78 582 billion Yuan/a. b) There is a certain difference exited in service functional value of unit area of southern and northern slopes. The value of northern slope is higher than that of the southern slope, while the southern slope area is much greater than that of the northern slope, thus, the contribution of service functional value of integrated ecosystem of southern slope is greater than that of the northern slope. c) Both of the vegetation on southern and northern slopes has played important functions on the aspects of soil conservation, carbon dioxide fixation and water source conservation. It puts forward plans for spatial grading of service functional values of ecology and suggestions on ecosystem protection.
出处
《中国水土保持》
北大核心
2004年第4期19-21,共3页
Soil and Water Conservation in China
