内蒙古短花针茅草原种子植物区系研究  

Floristic Study of Spermatophyte on Stipa breviflora Steppe Distributed in Inner Mongolia

作　　者：张庆[1] 牛建明[1,2] 董建军[1] 王凤兰[1] 郭婧[1] 丁勇[1] 赵利清[1] 

机构地区：[1]内蒙古大学生命科学学院生态与环境科学系,内蒙古呼和浩特010021 [2]内蒙古大学中美生态、能源及可持续科学研究中心,内蒙古呼和浩特010021

出　　处：《中国沙漠》2009年第3期451-456,共6页Journal of Desert Research

基　　金：国家“973”计划子课题(2007CB106807);国家自然科学基金项目(30760158);内蒙古草地生态学重点实验室--省部共建国家重点实验室培育基地项目(2007-02);内蒙古大学人才引进项目;内蒙古大学“513”项目;教育部留学归国人员科研启动基金([2003]406)资助

摘　　要：对短花针茅草原种子植物科、属、种的区系特征进行了统计分析,结果表明:①研究区共统计种子植物31科,96属,161种,并集中分布在几个大科,区系的优势现象明显;②属种比为1∶1.68,较内蒙古自治区、全国及全世界均低,物种分化程度低;③植物区系组成具有明显的温带性质,但与热带植物区系也存在一定的亲缘关系,具有过渡性;④植物区系组成以年轻成分为主,兼有古老性;⑤植物生活型特征表明本区多年生草本植物占绝对优势,表现出草原植物群落种类组成的特征,但由于该区土壤覆沙或沙质化明显,因此,灌木和半灌木种类也较多;⑥植物水分生态类群以旱生为主,非旱生也占有很大比例,具有明显的过渡性;⑦该生态系统比较脆弱,应加强保护,合理利用,实现可持续性发展。The flora characteristics of Stipa breviflora steppe in Inner Mongolia at different levels of family, genera and species were studied. （1）The total of 161 species, belongs to 31 families and 96 genera of Spermatophyte, was counted. Most of them concentrated on several main families, which demonstrated rioristic dominances obviously; （2）The ratio of genera to species, 1/1.68, of the steppe was smaller than that of Inner Mongolia, China and of the world, represented the low level differentiation of species; （3）The flora showed the composition of temperate zone remarkably, although there was a certain relationship with the flora of tropic zone. The transitional characteristics of the flora was clear; （4）The flora was dominated by young components, while ancient ones played a companionate role; （5）According to the statistics of life forms, perennial herbs dominated the steppe, which showed the features of plant species composition of steppe communities. However, there were a lot of shrubs and semi-shrubs due to the sandy soil covered many areas in this region; （6）Compared with non-xerophytes that accounted for a large proportion, the xerophytes were still dominances. The transition in terms of ecological types of water was obvious, too; （7）This steppe is fragile at present. It is necessary to strengthen the protection and to promote the rational utilization so as to implement sustainable development.

关 键 词：短花针茅草原 植物区系 种子植物 内蒙古 

分 类 号：Q948.5[生物学—植物学]