云南地区裸子植物的区系组成及物种多样性分布格局  

Flora Composition and Geographical Distribution Patterns of Species Diversity of Gymnosperms in Yunnan

作　　者：冯建孟[1] 朱有勇[2,3] 

机构地区：[1]大理学院生命科学与化学学院,云南大理671000 [2]云南农业大学农业生物多样性应用技术国家工程研究中心,昆明650201 [3]农业生物多样性和病虫害控制教育部重点实验室,昆明650201

出　　处：《西南大学学报（自然科学版）》2011年第10期51-56,共6页Journal of Southwest University(Natural Science Edition)

基　　金：国家"973"计划基金资助项目(2006CB100200)

摘　　要：该研究利用云南地区裸子植物的地理分布信息,探讨了该地区裸子植物的多样性、区系构成及其地理分布格局.结果表明:云南地区共拥有裸子植物106种,分属于32属,10科,是中国裸子植物最丰富的地区.比较重要的科为松科Pinaceae、柏科Cupressaceae、罗汉松科Podocarpaceae和杉科Taxodiaceae;比较重要的属为圆柏属Sa-bina、松属Pinus和罗汉松属Podocarpus.无论是在科还是在属的水平上,云南地区裸子植物区系总体上以温带区系成分为主,表现出强烈的温带区系特征.温带起源的松科、杉科和柏科植物主要分布于云南北部,尤其是滇西北地区,这与喜马拉雅山的抬升作用和相对温凉的环境是一致的.热带起源的罗汉松科、买麻藤科和苏铁科植物主要分布在云南南部地区,这与其相对温暖的环境和稳定的地质历史是一致的.云南地区裸子植物科的种系分化强度的高值主要出现在滇西北地区,这可能与其相对活跃的地质历史和复杂的地形有关.In this paper,the taxa diversity and flora composition of gymnosperms and their geographical distribution patterns in Yunnan were investigated based on comprehensive flora information in a large scale.A total of 106 gymnospermous species of 32 genera and 10 families were found to distribute in the study area,suggesting that the study area is a hotspot of taxa diversity of gymnosperms in China.The most important families included Pinaceae,Cupressaceae,Podocarpaceae and Taxodiaceae.The most important genera included Sabina,Pinus and Podocarpus.The flora of gymnosperms was dominated by temperate elements according to flora composition of genera and families.Pinaceae,Cupressaceae and Taxodiaceae originating in the temperate zone were mainly found in the northern part of Yunnan,especially in Northwest Yunnan,which may be due to the upheaval of the Himalaya and relatively cool climate.Podocarpaceae,Gnetaceae and Cycadaceae originating in the tropical zone were mainly observed in the southern part of Yunnan,which was consistent with its stable geological history and warm climate.The strong species differentiation was mainly found in Northwest Yunnan,which was mainly due to its active geological history and complex topography.

关 键 词：裸子植物 区系组成 物种多样性 分布格局 云南地区 

分 类 号：Q948.5[生物学—植物学]