乌海草原化荒漠区种子植物区系研究  

Floristic Analysis of Spermatophytes in the Steppe Desert Area of Wuhai

作　　者：岳秀贤[1] 刘果厚[1] 任林 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 [2]内蒙古乌海市园林局,内蒙古乌海016000

出　　处：《草地学报》2011年第1期7-12,共6页Acta Agrestia Sinica

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);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;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)

摘　　要：通过3年实地调查结果以及大量文献资料查阅,研究乌海草原化荒漠区种子植物区系的组成和特征,以期探讨其起源与演化。结果表明:该区有种子植物72科、267属、565种,其中被子植物占总数的99.1%。大型科、寡种科属和单种属是本区系的主体,是植物区系复杂性及物种多样性的主要来源,大型科和寡种属优势明显。中型科属和单种科虽不占主体,但对植物群落的组成和植物区系的构成具有重要影响。区系地理成分复杂多样,联系广泛,温带分布和地中海-中亚分布是本区系地理成分的主要组成部分,区域植物具有明显的温带性质,特有程度较低。区域植物表现出较强的旱生性和古老性,从其发生角度可以归为古地中海成分和东亚成分2大地理成分。The composition and features of spermatophytes were analyzed to explore the origin and evolution of flora in the steppe desert area of Wuhai.Results based on a three-year survey with ample relevant data suggest that the spermatophyte distribution in the steppe desert area include 72 families,267 genera and 565 species,of which 560 angiosperm species（including 41 varieties） belong to 265 genera and 70 families.The number of angiosperms account for 99.1% of all species.The multi-specific family,oligo-specific family,oligo-specific genera and mono-specific genera are the main source of flora complexity.The dominance of the multi-specific family and oligo-specific genera were evident in the number of species.In most cases,though mid-specific family,mid-specific genera and mono-specific family are not the main part,they have an influence on the structure of flora and vegetable composition.Geographic elements of the flora were complex and numerous.Both temperate element and Mediterranean-Central-Asia element were the main part of local flora.The temperate element characteristics were the typical features of local flora.The particular components only include six Chinese endemic genera.Both xeromorphy and antiquity are domination in the flora classified as Old Mediterranean and East Asia element according to their origin.

关 键 词：种子植物 区系分析 乌海草原化荒漠区 

分 类 号：Q948.5[生物学—植物学]