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中国鹅掌楸的地理分布与空间格局
引用本文:方炎明.中国鹅掌楸的地理分布与空间格局[J].南京林业大学学报(自然科学版),1994,18(2):13-18.
作者姓名:方炎明
作者单位:南京林业大学森林资源与环境学院
摘    要:中国鹅掌楸呈东北-北美东部间断分布模式,该种的现代分布范围主要位于我国中亚热带,北纬22-32.5°,东经104.5-119.2°。大地理空间的分布格局呈聚集分布;小空间范围多呈均匀分布,个别地方居群呈聚集分布,中国鹅掌楸在历史上有过兴盛时期,虽然总体上趋势于衰退,但在局部有利的生境中表现一定的发展潜力。分布区及分布模式的形式,是鹅掌楸属的联合统一分布区分割的结果,它有三方面的原因:第三纪以来冷暖

关 键 词:地理分布  空间格局  中国鹅掌楸

GEOGRAPHICAL DISTRIBUTION AND SPATIAL PATTERN OF LIRIODENDRON CHINENSE(HEMSL.)SARG
Fang Yanming.GEOGRAPHICAL DISTRIBUTION AND SPATIAL PATTERN OF LIRIODENDRON CHINENSE(HEMSL.)SARG[J].Journal of Nanjing Forestry University(Natural Sciences ),1994,18(2):13-18.
Authors:Fang Yanming
Institution:College of Forest Resources and Environment
Abstract:Liriodendron chinense is one of the genera with a disjunct pattern. It occurs mainly in subtropical China, with the latitude roughly from 22 to 32. 5 degrees, and the longitude roughly from 104. 5 to 1 19. 2 degrees. On a large scale, the distributive pattern trends to be aggregate. On a small scale, within a community it shows a tendency to be regular but occassionally aggregate. The Pattern analysis implies that the taxon ever reached a evolutional Peak historically, in spite of its prevailing tendency of phytogenetical declining recently. On the other hand, a few local population may still show evolutional potential. The modern range and distributive Pattern result from breaking of the formerly united and continuous range of Liriondendron. The possible reasons include: the Tertiary climate, paleogeology and evolution itself. The Tertiary climate characterized by cooling vs. warming fluctuation was a powerful dynamic agent. The existence of the Bering and other geographical events provided the Path and processes. Finally, the morphological and genetic divergence in the old genus were the source of this pattern development. On the basis of geographical analysis and pattern test, with the consideration of changing climate, changing geography, and evoluting biota, the author suggests that L. chinense and L. tulipifera are a pair of sister species. which may be derived from the near ancestors by allopatric speciation respectively.
Keywords:Geographical distribution  Space pattern  Liriodendron chinense  
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