中文摘要：

生态交错带是指两种不同类型的生态系统交界过渡的区域。基于生态交错带理论对重庆三峡库区的生态脆弱性状况进行了分析，并在此基础上运用道夫尼尔和地球环境的潜在指数M，计算人对地理环境的影响，评估土地类型和环境污染状态。通过对生态环境潜在容量指数E的修正评估了库区 22 个区县的生态环境潜在容量，并在此基础上做出预警研究，将其划分为急警、重警、中警、轻警和无警 5 种类型。最终得出重庆三峡库区生态环境状况两极化现象比较严重，发展不平衡，有些地区生态破坏较为严重，因此需要采取相应的对策进行优化发展。

英文摘要：

Ecotone is a transition zone of two different ecosystem junctions. Based on the Ecotone theories, this paper analyzed the ecological vulnerability of the Three Gorges reservoir, and then applied the ecological environment potential index （M） to monitor the human＇s impacts on the geographic environment, land type, and the environment pollution status. According to the regional characteristics, the index for potential capacity of ecological environment （M） was further amended for evaluating the potential ca- pacity of ecological environment in 22 counties of the Three Gorges reservoir. Subsequently, a pre-warning evaluation was performed after the potential capacity of ecological environment was ranked into five levels, e. g. , urgent warning, heavy warning, middle warning, light warning, and no warning. The results demonstrated that the development situation of environmental quality in the Three Gorges reservoir was not balanced; meanwhile, there remained the serious ecological deterioration in some regions, indicating that the polarization phenomenon was greatly serious our results suggest that some applicable strategies should be proposed for opti- mized development.