| 华夏植物群及其与全球同期植物群的比较 |
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| 引用本文： | 孙克勤.华夏植物群及其与全球同期植物群的比较[J].地学前缘,2002,9(3):73-84. |
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| 作者姓名： | 孙克勤 |
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| 作者单位： | 中国地质大学,地球科学与资源学院,北京,100083 |
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| 基金项目： | 教育部国家留学基金资助项目 ( 2 181110 5 ) |
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| 摘 要： | 文中研究的焦点是华夏植物群及其与全球同期植物群的比较 ,并论证了石炭纪和二叠纪的古植物地理再造。在石炭纪和二叠纪 ,华夏植物区和欧美植物区皆位于具热带气候的赤道区 ,在类似的气候条件下 ,这两个地区的一些植物具有形态上的相似性。此外 ,华夏植物群含有一些与欧美植物群共有的分子 ;因此 ,这两个植物群的关系比较密切。尽管华夏植物群具有相当数量的分子是与欧美植物群所共有的 ,但是在大羽羊齿类植物中 ,在种级上两者并没有相同的成分。华夏植物群是以热带雨林气候为特征。在二叠纪 ,华夏区的气候比欧美区的气候更为湿润。华夏植物群的分子不同于安加拉植物群的分子 ;此外 ,安加拉植物群代表了温带气候条件。在石炭纪和二叠纪 ,冈瓦纳植物群分布在南半球高纬度地区 ,不同于分布于北半球低纬度的华夏植物群的组成分子 ;因此 ,这两个植物群没有必然联系。在石炭纪和二叠纪 ,在北半球华夏植物群与欧美植物群的一些植物在形态上的相似性以及在南半球 (西藏、沙特阿拉伯、土耳其、新几内亚和伊拉克 )一些华夏型分子的分布可以是起因于类似的气候条件、大陆位置、板块运动、洋流作用、古地理环境等因素的影响。华夏植物群与其同期植物群的差异反映了植物群成分、古气候、古地理位置和陆地生态系在时?
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| 关 键 词： | 华夏植物群 欧美植物群 安加拉植物群 冈瓦纳植物群 石炭纪 二叠纪 古植物地理 |
| 文章编号： | 1005-2321(2002)03-0073-12 |
| 修稿时间： | 2002年2月25日 |
THE CATHAYSIA FLORA AND ITS COMPARISON WITH GLOBAL CONTEMPORANEOUS FLORAS |
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| SUN Ke,qin.THE CATHAYSIA FLORA AND ITS COMPARISON WITH GLOBAL CONTEMPORANEOUS FLORAS[J].Earth Science Frontiers,2002,9(3):73-84. |
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| Authors: | SUN Ke qin |
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| Abstract: | This study focuses on the Cathaysia flora and its comparison with global contemporaneous floras and deals with some aspects of palaeophytogeographic reconstructions of the Carboniferous and Permian. The Cathaysian and Euramerican floral provinces were both located in the equatorial regions in tropical climates, and some plants from the two areas had morphological similarities under similar climatic condition during the Carboniferous and Permian. In addition, the Cathaysia flora has a number of elements in common with the Euramerica flora. Therefore, the two floras are closely related. Although the Cathaysia flora has a number of elements in common with the Euramerica flora, none of the gigantopterids are shared by both floras at the species level. The Cathaysia floral province was characterized by a tropical rain forest climate. The climate of Cathaysia was more humid than that of Euramerica during the Permian. The elements of the Cathaysia flora are quite different from those of the Angara flora. In addition, the Angara flora represents a temperate climatic condition. During the Late Carboniferous and Permian, the Gondwana flora was distributed in high latitudes in the Southern Hemisphere, which was quite different from elements of the Cathaysia flora in low latitudes in the Northern Hemisphere. Thus, there is no relation between the two floras. The morphological similarity of plant elements of the Cathaysia flora and the Euramerica flora in the Northern Hemisphere and the distribution of the Cathaysian elements in some land masses in the Southern Hemisphere (Tibet, Saudi Arabia, Turkey, New Guinea and Iraq) might be due to similar climatic conditions, continental positions, tectonic movements, oceanic circulation, and palaeogeographical environments during the Carboniferous and Permian. Differences between the Cathaysia flora and its contemporaneous floras reflect variations of floristic composition, palaeoclimate, palaeogeographic position and terrestrial ecosystem in time and space. |
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| Keywords: | Cathaysia flora Euramerica flora Angara flora Gondwana flora Carboniferous Permian palaeophytogeography |
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