摘要
以2006—2008年野外调查数据为基础,结合文献研究和查阅标本资料,运用数量方法研究了宁夏贺兰山自然保护区野生维管束植物的濒临消失风险和优先保护级别。以样线分布频度、样地分布频度、现存多度、分布方式和确限度5项指标,对该保护区植物濒临消失程度进行定量评价,其结果为:宁夏贺兰山自然保护区有极易消失种14种,容易消失种28种,可能消失种55种,其余620种为安全种。利用濒临消失风险指数、遗传损失指数和利用价值指数3个指数,对该保护区内各植物物种的优先保护顺序进行综合评定,划分了保护级别,由此确定了宁夏贺兰山自然保护区一级优先保护植物有38种,二级优先保护植物有90种,非保护植物共590种。
This paper mainly studies the extinction risk and the classes of conservation priority of wild plants in Helan Mountain Nature Reserve in Ningxia of northwestern China,based on field investigation from 2006 to 2008,literature and specimen examination using quantitative methods.The degree of endangerment was evaluated quantificationally by 5 indices,i.e.distribution frequency of line-transect,distribution frequency of sample plot,existent abundance,distribution mode and exclusiveness.The results show that there were 14 endangered species,28 vulnerable species,55 near threatened species and 620 secure species in this nature reserve.We evaluated the order of priority for conservation of plant species using the comprehensive evaluation by endangerment index,genetic loss index and utility value index.Thus, in Helan Mountain Nature Reserve in Ningxia,we made certain that plant species of the first rank protection was 38,that of the second rank protection was 90,and the non-protection species was 590.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2010年第2期113-117,共5页
Journal of Beijing Forestry University
基金
"十一五"国家科技支撑计划项目(2008BAB0B01)
关键词
自然保护区
濒临消失风险
优先保护
贺兰山
nature reserve
extinction risk
conservation priority
Helan Mountain
