西北干旱区生态系统服务重要性评价--以阿勒泰地区为例

Importance evaluation of typical ecosystem services in arid regions of northwest China: A case study in Altay Prefecture

生态系统服务是国内外研究的热点问题,西北干旱区独特的地理特征赋予其宝贵的生态系统服务。以阿勒泰地区为研究区,结合"山盆系统"理论评价了生态系统服务重要性,分析了水源涵养、土壤保持、生物多样性保护和固碳释氧4种典型服务的空间分布格局,为研究区的生态保育提供支撑。结果表明,生态系统服务极重要区域面积占总面积的25.21%,主要位于植被覆盖度高的山地带。因此,我们建议当地政府尽快落实生态保护红线,禁止在山地带进行大规模开发活动,同时保护好过渡带的传递服务与生态屏障功能。

Research on ecosystem service is a hot topic in domestic and abroad academe. The unique geograph- ical features of arid regions of northwest China endow them with valuable ecosystem services. I4owever, related research on ecosystem service of arid regions in northwest China is quite few. Based on theory of mountain - ba- sin system （ MBS）, we evaluated the importance of ecosystem service of Altay Prefecture. Four typical ecosystem services of Ahay Prefecture were quantitatively evaluated and rated, including water conservation, soil conserva- tion, biodiversity protection, and carbon - fixation and oxygen - release. The results show that the zones that are extremely important in terms of ecosystem services constitute 25.21% of the prefecture＇s total area. They are mainly distributed in mountainous zones with high vegetation coverage. Therefore, we suggested that the local government to carry out the ecological protection line as soon as possible. Meanwhile, large -scale development activities in mountainous zones should be prohibited to protect the delivery service and ecological barrier function of ecotone.