中文摘要：

鄂尔多斯高原是一个极端受损的生态系统,为避免其再度恶化,需采取紧迫措施。利用典型对应分析（CCA）方法,在地理信息系统（GIS）的支持下,以乌海市为例,用景观指数对植被分布与环境因子之间的关系进行研究。结果表明,乌海市植被分布与环境因子有着极其紧密的联系,地貌、土壤这类环境因子对植被分布的影响要大于海拔、坡度这类大尺度的环境因素;因此,用GIS结合CCA对植被与环境关系的研究是有效的,对采取更有效的措施保护生态系统有所帮助。

英文摘要：

Vegetation ecosystems in Western Ordos Plateau are endangered and measures should be taken to protect from further disturbance urgently. In this article, taking Wuhai for example, based on GIS （geographic information system）, the vegetation distribution pattern was analysed using CCA （Canonical correspondence analysis） ,and landscape indexs was used to detect the relation between vegetation and environmental factors. The results show that the distribution of vegetation in Wuhai is closely related to the environment and the geomorphic type and soil have more influence than the elevation and slope which is large scale environmental factors on the distribution of vegetation in Wuhai. It is observed that integration of ordination with GIS is an alternative ways to get better understanding of environmental impacts on vegetation pattern, which will be helpful to make more effective protection strategy to these endangered vegetation ecosystem.