北京市湿地维管束植物多样性及优先保护级别划分

综合样带法和样方法对北京24处湿地进行调查，以样地数据为基础计算各处湿地维管束植物的多样性指数，及典型湿地维管束植物物种丰富度和优势度，并对计算结果进行聚类分析。根据分类结果对湿地赋分，密云水库、永定河、玉渡山水库3处湿地确定为重点保护区域，金海湖、汉石桥、野鸭湖等6处湿地确定为一级保护区域，潮白河、拒马河等6处湿地确定为二级保护区域，三里河、翠湖等6处湿地确定为三级保护区域，白河堡水库、北运河和凉水河3处湿地确定为湿地修复区域。根据各处湿地的特点提出国家级、市级、县级湿地自然保护区，湿地保护区小区、市级、县级湿地公园，湿地恢复小区的建设方案。

Diversity and priority conservation graded wetland vascular plants in Beijing

Twenty four wetlands in the Beijing area have been investigated by means of transect lines and square sample plots.Species richness and dominance indices of typical wetland plants and five biodiversity indices of wetland vascular plants have been calculated.Based on these results,the wetlands were classified by cluster analysis and graded.The district protection area consists of three wetlands: the Miyun Reservoir,Jinniuhu Lake and Guihe River;the first and second grade protection area both consist also of six wetlands: the first area includes Jumahe River,Hanshiqiao and Yeyahu Lake;the second Huairou Reservoir,Yongdinghe River and Jinhaihu Lakes.The third protection area consists of four wetlands: Beishahe and Chaobaihe Rivers,Longqingxia Reservoir and Guishuihu Park. The restoration area consists of five wetlands and includes the Baihebao Reservoir,Beiyunhe and Liangshuihe Rivers.Considering the characteristics of wetlands,we propose the establishment of national,municipal and county nature reserves,wetland protection and restoration plots and finally municipal and county wetland parks.