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当前位置: 首页 > 文章 > 上海崇明东滩外来物种互花米草二次入侵过程 应用生态学报 2012,23 (11) 2997-3002
Position: Home > Articles > Reinvasion of exotic plant species Spartina alterniflora in Chongming Dongtan Nature Reserve of Shanghai Chinese Journal of Applied Ecology 2012,23 (11) 2997-3002

上海崇明东滩外来物种互花米草二次入侵过程

作  者：
肖德荣;祝振昌;袁琳;田昆
单  位：
华东师范大学河口海岸学国家重点实验室;西南林业大学国家高原湿地研究中心
关键词：
互花米草;二次入侵;有性扩散;无性繁殖;崇明东滩
摘  要：
选取上海崇明东滩"刈割+水位调节"集成技术治理互花米草示范工程样地,对互花米草二次入侵过程进行了2年的监测.结果表明:大量互花米草实生苗在春季随潮水沿潮沟等通道向恢复自然水文区扩散定居,2年即可形成与周边群落无明显差异的二次入侵群落,而群落边缘通过无性繁殖的扩散距离有限.在保持淹水控制区,互花米草两年累计扩散距离小于1m.在物理隔离区,2年未监测到互花米草的二次入侵现象.实生苗在春季的快速拓植是互花米草实现种群二次入侵的关键.彻底消除治理区周边互花米草扩散源,设置隔离带以阻止其向治理区的扩散,或采用种植芦苇等土著物种进行生物替代,是防止互花米草二次入侵的主要措施.
译  名：
Reinvasion of exotic plant species Spartina alterniflora in Chongming Dongtan Nature Reserve of Shanghai
作  者：
XIAO De-rong1, ZHU Zhen-chang2, YUAN Lin2, TIAN Kun1 (1National Plateau Wetlands Research Center, Southwest Forestry University, Kunming 650224, China; 2State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200026, China).
关键词：
Spartina alterniflora; reinvasion; sexual reproduction; vegetative propagation; Chongming Dongtan
摘  要：
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 countermeasures to effectively prevent the reinvasion of S. alterniflora.

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