• 关键词：生态系统健康  生态服务价值评价  辉河湿地保护区

• 基金项目：国家环境保护公益性行业科研专项(No.200809125);鲁东大学学科建设项目资助

• 常学礼
• 鲁东大学地理与规划学院, 烟台 264025

• 吕世海
• 中国环境科学研究院生态研究所, 北京 100012

• 叶生星
• 中国环境科学研究院生态研究所, 北京 100012

• 陈艳梅
• 中国环境科学研究院生态研究所, 北京 100012

• 摘要：在RS和GIS技术的支持下,以1975和2006年两期遥感影像为信息源,从生态系统空间范围和服务功能价值变化的角度对呼伦贝尔辉河草原湿地国家级自然保护区的生态系统健康状况进行了分析.结果表明,1975～2006年间辉河湿地自然保护区的草原和湖泊面积分别减少了7346和2731hm²,湿地和干涸湖面积分别增加了6877和2953hm².从自然保护区的核心——湿地生态系统的斑块格局变化来看,1975～2006年间斑块密度增加了74.48个·hm^-2,斑块连通度在100～300m的阈限值范围内呈减少的趋势,平均减少0.069±0.038.基于生态系统服务价值的评价结果表明,1975～2006年间辉河湿地国家自然保护区生态系统达到健康水平以上的区域面积为323215hm²,占保护区面积的93.31%,生态系统较差和恶劣区的面积为23177hm²,占总面积的6.69%.研究区的总生态价值盈余为8.8×10⁷元,其盈余主要来源于草原向湿地的转化、水体向湿地的转化及干涸湖向草原的转化.

• Abstract：We examined the ecosystem health status of the Huihe National Wetland Reserve in the Hulunbeier grassland in terms of spatial features and service values,by RSand GIStechniques based on Landsat Multispectral Scanner(MSS) images from 1975 and 2006,The areas of grassland,lake,wetland,and dried-up lake changed significantly during the 1975 to 2006 period,losing 7346 hm² of grassland and 2731 hm² of lake area,while gaining 6877 hm² of wetland and 2953 hm² of dry lake bed.Wetland,as an important component of the Reserve,varied most obviously in terms of patch scale during this period.Patch density increased by 74.48 patches per kilometer and patch connectivity index decreased by a mean value of 0.069 ± 0.038 in the threshold range of 100 to 300 m.From the viewpoint of ecosystem health assessment,over 93.31% of the total area(323215 hm²) is healthy,and the remaining 6.69% of the total area(23177 hm²) has become unhealthy or worse since 1975.The ecosystem service value of the Reserve has increased by 8.8 × 10⁷ RMBduring this period,mainly due to the conversion of grassland and lake to wetland,and dried-up lake to grassland.

• Key words：ecosystem health  assessment of ecosystem service value  Huihe wetland reserve

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