应用生态学报2012，Vol.23Issue(11)：2997-3002,6.
上海崇明东滩外来物种互花米草二次入侵过程
Reinvasion of exotic plant species Spartina alterniflora in Chongming Dongtan Nature Reserve of Shanghai
摘要
Abstract
A demonstration plot in Chongming Dongtan for controlling exotic plant species Spartina alterniflora by using an integrated treatment technique of tussock cutting plus water level controlling was selected to make a 2-year monitoring on the reinvasion process of this plant species. A large number of S. alterniflora seedlings could proliferate and settle down in the hydrological restoring plots by tidal water in spring, and, after two years, the reinvasion community was established, with no obvious differences in its density as compared to the communities in neighboring areas. However , the distance of extension via vegetative propagation was limited. At the plots maintaining waterlogging, the distance of 2-year lateral extension was less than 1 m; at physically isolated plots, there was no any reinvasion of S. alterniflora. The rapid spreading of the seedlings in spring was the key of the fast reinvasion of S. alterniflora, and thus, to completely eradicate the spreading source from neighboring areas, to build isolation barrier to stop the spreading of this plant, and to adopt biological substitute by planting a native species such as Phragmites australis would be the main coun-termeasures to effectively prevent the reinvasion of S. alterniflora.关键词
互花米草/二次入侵/有性扩散/无性繁殖/崇明东滩Key words
Spartina alterniflora/ reinvasion/ sexual reproduction/ vegetative propagation/ Chongming Dongtan分类
农业科技引用本文复制引用
肖德荣,祝振昌,袁琳,田昆..上海崇明东滩外来物种互花米草二次入侵过程[J].应用生态学报,2012,23(11):2997-3002,6.基金项目
云南省应用基础研究计划项目(2011FB069)、上海市科委海洋科技专项(10dz1211002)和云南省社会事业发展专项(2010CA010)资助. （2011FB069）
