北京喇叭沟门自然保护区植物濒危程度和保护级别研究

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

Evaluation on threatened situation and protection classes of vegetation in Beijing Labagoumen reserve

By discussing the research development of endangered species' threatened situation, and analyzing factors that threaten plants' survival, the paper puts forward quantified indexes for assessing the evaluating system of plants threatened situation, and comprehensively evaluates the threatened situation of plants in Beijing Labagoumen reserve. The result shows that the number of lost species is 13,critically endangered species 14,endangered species 36,vulnerable species 49,lower risk species 71,safty species 448. The paper also analysed the geniue loss index and the urgent conservation value of vegetation,and gave a method to deter the conservation classes.The species number of first class is 30,second class 57,and the third class 83.