北京山地植物多样性优先保护地区评价

Priority area assessment for plant biodiversity conservation in Beijing

为促进北京市植物多样性的保护及自然保护区的合理建设与布局,以2001～2006年间在北京市13个自然保护区、森林公园或者风景名胜区内实地调查的1168个样地数据为基础,根据在北京市分布的25种珍稀濒危植物种,以及丰富度高的群落类型、面积较大的天然森林群落类型和具有重要生态功能的森林群落的评定结果,采用等级赋值的方法,利用地理信息系统软件从植物物种和植物群落方面综合评定了北京市山地植物多样性的优先保护地区。评定出综合优先保护地区总面积为184474.64hm2,约占市国土面积的11.25%,其中一级优先保护地区总面积24850.50hm2,二级优先保护地区总面积78606.60hm2,三级优先保护地区总面积81017.54hm2。优先保护地区主要分布于怀柔区、延庆县、房山区和密云县等远郊区县,结合北京市自然保护区分布现状,提出了北京市自然保护区建设优化方案。

In order to improve effectiveness of plant biodiversity conservation and provide scientific bass for nature reserve planning in Beijing,we conducted priority area assessment for plant diversity in Beijing mountains,Form 2001 to 2005,data on 25 rare and endangered species,communities with higher species abundance,larger distributed areas and more important ecological function were analyzed based on 1168 field surrey spots in 13 nature reserves,forest park or scenic areas in Beijing.Results suggest that： 184474.64hm^2 should be set as conservation priority areas,which account for 11.25% of Beijing territory.Further analyses indicate that among these priority areas,we identified 24850.50hm^2 as first grade areas,78606.60hm^2 as second grade areas,and 81017.54hm^2 as third grade areas.Most of these priority areas located at far suburb Beijing,e.g.,Huairou district,Yanqing County,Fangshan district,Miyun County.Based on our results,a revised nature reserve development plan has been proposed.