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中文摘要：
珍稀植物的濒危等级评估是确定地区性水平上物种优先保护顺序的关键。根据野外调查,以亚热带东部地区江苏宝华山国家森林公园的24种野生珍稀植物为研究对象,采用IUCN红色名录等评价指标进行定量分析,计算了各物种的濒危系数和优先保护值,确定了其濒危等级及优先保护次序。结果表明：（1）宝华山24种珍稀植物的优先保护值范围介于0.327 8~0.802 2之间;（2）这些物种可分为5个濒危等级,其中有1种处于野生绝灭（EW）,2种处于极危状态（CR）,11种处于濒危状态（EN）,7种处于易危状态（VU）,3种处于近危状态（NT）;（3）生境破碎化和旅游活动中的人为干扰是目前该区珍稀植物保护面临的主要威胁因素。因此,强化旅游管理,减少人为干扰,同时定期监测受威胁植物的动态变化,将有助于对其进行有效保护。
英文摘要：
Grading of rare plant species in endangerment is crucial to determination of their protection priorities at a regional level. Based on field surveys,24 selected rare and wild plant species in the Baohuashan National Forest Park,Jiangsu Province in subtropical East China,were evaluated quantitatively in the light of the categories and criteria of the IUCN Red List. For each species,endangerment coefficient and protection priority value was calculated,and grade in endangerment and sequence in protection priority determined. Results show that（ 1） the protection priority values of those species ranged from 0.327 8 to 0.802 2;（ 2） the 24 species could be classified into 5 categories in endangerment,that is,1 in Category EW（ extinct in wild species）,2 in Category CR（ critically endangered species）,11 in Category EN（ endangered species）,7 in Category VU（ vulnerable species）,and 3 in Category NE（ nearly endangered species）; and（ 3）habitat fragmentation and human disturbance resulting from tourist activities are the two major threats to the protection of rare plants in this area. Therefore,it is essential and urgent to intensify the management of tourism and hence to reduce human disturbance,and keep regular monitoring of dynamics of the threatened plants. The measures will help exert effective protection of those plant species.
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