通辽市少花蒺藜草群落多样性分析  

Community diversity analysis of Cenchrus pauciflorus under different disturbance in Tongliao and surrounding area

作　　者：张志新[1] 田迅[2] 刘勇[1] 黄贝梅 

机构地区：[1]草地农业系统国家重点实验室兰州大学草地农业科技学院,甘肃兰州730020 [2]内蒙古民族大学生命科学学院,内蒙古通辽028043

出　　处：《草业科学》2015年第9期1392-1398,共7页Pratacultural Science

基　　金：国家自然科学基金项目(31360574);内蒙古自然科学基金项目(2011MS0403)

摘　　要：2008年7-8月用样方法对科尔沁沙地通辽市及周边地区森林公园、高林屯、建国村和巴胡塔4个不同人工干扰地区的入侵种少花蒺藜草(Cenchrus pauciflorus)及其伴生种进行调查,分析了各地区物种组成、盖度、高度、密度、重要值及多样性指数,以阐明少花蒺藜草及其伴生种在科尔沁沙地的多样性分布格局。结果表明,少花蒺藜草在建国村的入侵程度最严重,而对森林公园样地的影响最小。少花蒺藜草入侵严重的样地物种相对较少,植被分布不均匀,植被盖度低,受人工干扰大且多样性指数降低。受人工干扰较少的生境系统在少花蒺藜草的入侵时更稳定。此外,植被分布方式与少华蒺藜草分布紧密相关。Cenchrus pauciflorus and its accompanying species in four different locations （Forest Park, Gaolintun, Jianguo Village and Bahuta） with different disturbance from human being in Korqin sandy land were investigated by Quadrat method from July to August of 2008. Species composition, coverage, height, density, important value as well as diversity index in the four sites were analyzed to reveal C. pauciflorus and its accompanying species distribution pattern in Korqin sandy land. The results showed that C. pauci- florus had a serious invasion in Jianguo Village and a tiny interference to Forest park. In the plots with serious invasion of C. pauciflorus, there were less species, uneven distribution of plant species, low vege- tation coverage, more interference and low biodiversity index. The ecosystem with less interference from human being was more stable in the habitat invaded by C. pauciflorus. The distribution pattern of vegeta- tion had a close relationship with C. pauciflorus.

关 键 词：人工干扰 入侵种 少花蒺藜草 多样性 群落 

分 类 号：S45[农业科学—植物保护]