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题名: 大围山种子植物的植物地理学研究
作者: 税玉民
学位类别: 博士
答辩日期: 2000
授予单位: 中国科学院昆明植物研究所
授予地点: 中国科学院昆明植物研究所
导师: 吴征镒
关键词: 种子植物 ; 区系地理 ; 大围山 ; 中国
学位专业: 植物学
中文摘要: 大围山位于云南省东南部,南临越南沙坝,面积1600平方公里,地处东经103°39'~103°51'、北纬22°28'~22°45'。该地区最高海拔为2363米,最低海拔仅为76米。温暖、湿润而稳定的气候极有利于种子植物的生存和分化。大围山也是一个重要的区系结,中国-日本植物亚区与中国-喜马拉雅植物亚区以及东亚植物区和古热带植物区交汇于此。初步统计显示大围山具有种子植物234科1298属3998种(不含种下等级)。在此研究中,重点讨论了以下三方面的问题:1)植被,群落的水平和垂直分布以及优势种分布区的对比分析,为在宏观上确定大围山的区系地位提供了依据。2)重要类群,秋海棠属作为大围山第四大属,在此具有47种(及变种)之多,结合其系统地位及分布区的研究,大围山是秋海棠属植物的一个分子中心,并且也提示大围山在植物区划中属滇黔桂热带亚热带地区的西翼。3)整个大围山种子植物的统计和分析说明大围山植物区系的热带性、古老性、过渡性及特有性。基于这些研究,提出了山顶压缩和低地扩散理论,其主要内容如下:1)山顶是一个封闭的地区,那里的植物要么就地起源,要么向下迁移;2)低地或河谷,是一个开放的空间,这是的植物除了就地起源外,还可以向下或水平两个方向迁移;3)在山腰,植物则有4种方向发育和散布,即就地起源和向下、向上及水平迁移。这一理论对解释大围山中一些特有分化和间断分布有一定的帮助。
英文摘要: Mt. Dawei is located in Southeast Yunnan, China, and next to Chapa, Vietnam, it occupies 1600km and reaches from Ca. 103°39°~103°51'E and 22°28°~22°45'N. The highest peak is 2363m in elevation, while the lowest point is only 76m. The warm, moist and steady climate is very benefit to the survival and differentiation of the angipsperms. It is also an important Flora-knot, because it lies not only between subkingdom Sino-Japanese and Sino-Himalayana, but also between Kingdom Eastern Asiatic and Paleotropic. Statistics suggest that Mt.Daweishan comprises 3998/species in 1298 genera of 234 families. In this study, the three aspects are emphasized. 1) Vegetation: the horizontal and vertical characteristics of community are discussed and the distribution of the dominate species are analysed to evaluate the Flora setting of the Dawei in large scale. 2) Important taxon: As a second genus, Begonia L. in Mt. Dawei has about 42 species and 5 varities in six sections, whose systematic positions and distributions imply that the Mt. Dawei is one of diversity centers of Begonia L. and that it belongs to the west wing of the Tropics and Subtropic of Dian-Qian-Gui region. 3) The Statistics and analyses of the Angiosperms in Mt. Dawei show that the flora of Mt, Dawei has the characteristics of tropic, antique, transition and endemy. Based on these studies, the Summit-Compressed and Lowland-Dispersal theory is put forward. :1) Summit is a blockade area, where plants either differentiate in situ or immigrate downward; 2) Lowland is an open area, where plants either differentiate in situ or immigrate horizontally or immigrate upward; 3) At the mountain slope, four directions are chosed by plants, e.g. upward, downward, horizontal immigration and in situ differentiation. The theory is helpful to explanation of the endemic differentiation and discontinuous distribution of some taxa in Mt. Dawei.
语种: 中文
内容类型: 学位论文
URI标识: http://ir.kib.ac.cn/handle/151853/620
Appears in Collections:昆明植物所硕博研究生毕业学位论文_学位论文

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