从生态安全涵义理解出发,建立了包括资源依赖性、生态环境状态、生态系统服务功能三方面在内的区域生态安全评价体系,提出区域生态安全系数概念和计算方法,并以海南岛为例,评价了其陆地生态系统安全,得出海南陆地综合生态安全系数为0.610,其生态服务功能安全性较高(0.772),而资源依赖性安全系数最低(0.468)。从研究可知,海南岛生态安全整体情况比较好,尤其是在水土保持、自然灾害抵制、空气净化等方面,但其能源的自给能力、生物多样性维持以及生活垃圾和污水的处理等方面都存在很大的不安全隐患,应采取科学合理的措施加以改善,从而构建海南岛安全的生态系统,实现区域可持续发展。

Ecological security is one of the important footstones of national security, and is the base of sustainable development.Regional ecological security means that the ecological condition and the main ecological issue of a region does not threaten its survival and development with a given temporal spatial environment,at the same time the natural ecosystem service meets the needs of the regional survival and development.On the basis of comprehension and analysis of ecological security conception,the evaluation indices system is established including ecological products, eco environment situation,ecological function,and regional ecological security index and calculation model is put forward.Taking Hainan Province as an example and applying this assessment method,its integrative terrestrial ecological security index is 0.610.Among three assessing aspects,ecosystem services security is highest(0.772),security depending on resource is the lowest(0.468).The result indicates that the terrestrial ecological security is better in Hainan province especially in erosion controlling,natural disaster rejecting,air quality maintenance,etc. But there is also a lot of unsafe hidden trouble about energy sources self supporting ability,biodiversity protection,waste and sewage disposal,etc.It is believed that scientific and reasonable measures should be further strengthened,and safe ecosystem should be developed,so as to realize regional sustainable development.