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该文讨论了国内外濒危物种评价的研究进展 ,分析了物种的受威胁因素 ,在此基础上筛选出喇叭沟门自然保护区植物濒危系数的计算指标 ,并参照《国际濒危物种等级新标准》和濒危系数 ,确定了评价该区植物濒危状况的等级 ,对该区全部维管植物濒危状况进行了量化综合评定 .评价结果表明 ,北京喇叭沟门自然保护区维管植物消失种 1 3个 ,极危种 1 4个 ,濒危种 36个 ,渐种危 49个 ,敏感种 71个 ,安全种 44 8个 .通过分析、计算物种遗传损失系数和急切保护值 ,提出定性与定量结合的自然保护区植物保护级别的评价方法 ,确定了急需保护植物种类、优先保护次序 ,并提出了不同保护级别物种相应的保护措施 .确定一级保护植物 30种、二级保护植物 5 7种、三级保护植物 83种
This paper discussed the research progress of endangered species assessment both at home and abroad, analyzed the threatened factors of species, and screened out the calculation index of plant endangered index of Labaogoumen Nature Reserve on this basis. According to the “International Criterion of Endangered Species Level” And the endangerment index, the grade of plant endangerment status was determined and the endangered status of all vascular plants in this area was evaluated comprehensively.The evaluation results showed that the number of vascular plants disappeared in Labaigoumen Nature Reserve in Beijing was 13, 14 critically endangered species, 36 endangered species, 49 gradually asymptomatic species, 71 as susceptible species and 448 as safe species. By analyzing and calculating the coefficient of genetic damage and the value of urgent protection, the paper proposed a combination of qualitative and quantitative conservation The evaluation method of plant protection level in the district identified the kinds of plants in urgent need of protection and the order of priority protection and put forward the corresponding protection measures for the species with different protection levels.There are 30 kinds of first grade protected plants and 57 kinds of second grade protected plants, 83 species of plants