滇中小百草岭种子植物区系的初步研究
A Preliminary Study on Floristics of Spermatophyte from Mt. Xiaobaicaoling, Central Yunnan, China
查看参考文献24篇
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文摘
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小百草岭具有野生种子植物141科、576属、1 406种.区系统计分析表明:(1)科级组成中,热带性质的科有55科,占总科数的56.12%,具较强的热带性质;属级组成中,温带性质的属有293属,占总属数的56.35%,表现出较强的温带性质,从科到属的区系成分变化表明:古热带起源的区系在喜马拉雅造山运动及滇中高原形成过程中,区系成分逐渐分化发展,在亚热带山地相应的海拔地段保留了相应的喜热成分,又分化出适应亚热带山地的喜温成分,从而使其区系的整体外貌呈现出热、温带成分的共存发展,是亚热带山地植物区系的一个基本特征;(2)区系成分新老兼备,既有第三纪古老孑遗的类群,也有新近分化衍生的类群,众多的中国特有分布型(种)中,表现出与周边地区较为广泛的地理联系,而与横断山地区共有的成分占据了明显优势,揭示了两地间紧密的区系联系. |
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其他语种文摘
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The Mt. Xiaobaicaoling is located at NW part of Central Yunnan Plateau (26°2'16" - 26°12'8" N and 100p56'24" - 101°13'18"E). It is about 520 km2 in area with an altitute ranged &om 3 647 m to 1 200 m. It belongs to the subtropical climate zone, an important factor contributed to diversified flora and relatively continuous vegetation types. The seed plant flora is made up of 1406 species, which belong to 576 genera and 141 families. Based on the distribution patterns on the levels of family, genus and spe-cies , there are two main conclusions as follows: (1) There are 55 families, accounted for 56.12 % of total families (excluding the worldwide ones), florisu'cally are tropical one, that shows a relative higher tropical floristic connection on the family level; but on genus level, there are 293 genera, accounted for 56.35% of total genera (excluding worldwide ones) floristically are temperate one, that shows a relative higher temper-ate floristic connection,. There is a transition when compare the families' composition of floristic elements with genus' one in tropical and temperate percentage, it clearly indicated that this flora is paleo-tropical in origin, whereas accompanied with the uplifting of Himalaya and Yunnan Plateau, the floristic elements di-verged according to its different temperature and water favor, this evolutionary process has been deeply en-graved on the distribution pattern of elevation, that is, the tropical and temperate floristic elements inhabit on corresponding elevation zone. It is a typical characteristic of subtropical mountain flora. (2) The taxa of older one and the younger one were all intermingled in this flora, depend on the distribution pattern of spe-cies ( endemic to China), it is show that this flora geographically has a broader connection with neighbor-hood region, but the species common to Mt. Xiaobaicaoling and Mt. Hengduan are clearly predominate, that is show a close floristic relationship between above two regions. |
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来源
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云南植物研究
,2005,27(2):125-133 【核心库】
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关键词
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小百草岭
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云南
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种子植物
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植物地理
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植物区系
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地址
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中国科学院昆明植物研究所, 云南, 昆明, 650204
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2700 |
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学科
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植物学 |
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基金
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国家973计划
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文献收藏号
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CSCD:1954263
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