【摘要】 根据河北省高等植物的地理分布、生态环境、种群数量以及资源利用现状,综合分析,提出了河北省珍稀濒危植物的受威胁种类和保护分级的标准,将河北省的70种珍稀濒危高等植物初步划分为3个保护等级。其中,河北省一级保护植物19种,二级保护植物22种,三级保护植物29种。分析了河北省珍稀濒危植物受威胁的主要原因,并在此基础上提出了保护对策。更多还原

【Abstract】 The higher plant floristic composition of Hebei Province including Sibirica and Eurasian temperate grassland elements and many species moved from north cold areas, elements expanded from tropic and subtropical zone of southwest China. All these elements meet here and make the flora of the Province take on a vivid transition. The geological history of Taihang and Yanshan Mountains are longinquity, the plant flora not only preserved some tertiary relic species but also brought many endemic species which only distribution in North China mountainous region. According to the study on the plants’geographic distribution, ecological environment, population and the actuality of the using of plant resource, the present paper analysed the geniue loss index and the urgent conservation value of vegetation, and gave a method to deter the conservation classes. Based on the criterion, the authors divided the 70 rare and endangered plants of the Province into three classes. The species number of the first class is 19, the second class is 22 and the third class is 29 species. Therefore, aside from analysis of reasons in rare and endangered plants in Hebei Province, some strategies for protection are put forward.更多还原