横断山区树线以上区域种子植物的标本分布与物种丰富度

张大才 已出版文章查询
张大才
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1 孙航 已出版文章查询
孙航
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hsun@mail.kib.ac.cn
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1中国科学院昆明植物研究所,昆明,650204;中国科学院研究生院,北京,100049;西南林学院,昆明,650224

2中国科学院昆明植物研究所,昆明,650204


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植物标本是植物空间分布信息的重要来源,也是估算物种丰富度的主要数据资料.本文收集了有关数据库和标本馆的标本资料,以分析横断山区树线以上区域种子植物标本的采集现状和物种丰富度.将树线以上区域(4,100-5,500 m)划分成14个100 m海拔带,将每号标本的海拔信息记录到相应的海拔带内.共收集8,316号标本信息,记载种子植物1,820种,其中横断山区特有种655种.这些标本在物种间的分布极不均匀,仅有1-2号标本的物种最多,共974种,占53.5%.各海拔带内标本总数、种均标本数和物种丰富度随海拔的增加而下降,但物种稀疏曲线不能很好地描述物种丰富度沿海拔梯度的分布格局.因此,需要开展更多的样地调查和标本采集工作,为物种丰富度的估算积累更多的资料.

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语种: 中文   

基金国家自然科学基金(40771073;30625004)

关键词海拔梯度 特有种 植物标本 物种丰富度 物种稀疏曲线


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