锡林郭勒荒漠草地种子植物区系研究  

Research on Spermatophyte Flora in the Xilingol Desert Steppe

作　　者：岳秀贤[1] 刘果厚[1] 刘慧娟[1] 扈顺[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《干旱区研究》2011年第4期643-648,共6页Arid Zone Research

基　　金：教育部博士点基金项目"浑善达克沙地榆适应机理研究"(20070129004);内蒙古自治区自然科学基金项目"西鄂尔多斯高原特有植物资源形成机制及保护措施的研究"(20080404zd14);教育部科学技术研究重点项目"基于景观格局演变研究的四合木生境质量动态评价"(209022)资助

摘　　要：通过对锡林郭勒荒漠草地种子植物的组成特征、区系地理成分的分析,结果表明:该区有种子植物55科180属348种,被子植物占优势。科属组成分析表明,区系优势现象较明显,优势科、大属和较大属均以温带分布占优势;属种的地理成分分析表明,温带分布属、种占优势,热带分布的属、种所占比例很小,表明温带属性是该地区植物区系的基本属性,并受泛热带植物区系的影响。不同地区植物区系相似性系数比较研究表明,与阿拉善荒漠区关系最为密切,草地植物区系具有明显的荒漠化特征。地理成分复杂、联系广泛。特有现象不明显,区系起源新老兼备,以新生进化成分为主。The local flora structure and the distribution characteristics of seed plants in the Xilingol desert steppe were studied based on wild vegetable survey by processing the data,analyzing the plant families,genera and species and applying the methods of botany and phytogeography.It is suggested to protect and utilize rationally the wild plant resources in the study area,and an important reference is provided as the scientific basis to protect the local plant species.The results show that the local plants belong to the desert steppe flora.So far 348 endemic species in 180 genera and 55 families in the Xilingol desert steppe were recorded.In which there were 4 species in 2 genera and 2 families of Gymnosperm and 344 species（including 31 varieties） in 178 genera and 53 families of Angiosperm.Composed by the families and genera,the plurimotypic families（including more than 10 species）,monotypic genera and oligotypic genera were the main part of the local flora and the main sources of flora complexity and species diversity to be as the widely distributed local species.At family level,the proportion of Gramineae,Compositae,Leguminosae,Chenopodiaceae,Cruciferae and Polygonaceae was the highest,there was a trend that the floristic element laid in big families of spermatophyte,and the dominance of plurimotypic families was evident.The proportion of 45 families with less than 10 species was 81.83% of the total families in the region.At genus level,although plurimotypic genera and plurotypic genera were the dominant species of local plant communities and the typical components,but they were not the main part,they had an important influence on the structure of flora and vegetable composition.The single-species genera and few-species genera are the main part of the local flora and the main sources of the local flora complexity and species diversity to be as the widely distributed local species.After analyzing the floristic geographical element of genera and species,the results reveal that the temperate element genera and

关 键 词：荒漠草地 种子植物 植物区系 地理成分 锡林郭勒 

分 类 号：Q948.5[生物学—植物学]