Vegetative Dispersal Ability of Spartina alterniflora in Eastern End of Chongming Island(Chinese)
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摘要: 互花米草是对我国影响较大的外来物种，尽管对其带来的效益以及危害等方面进行了一些研究，但是对影响这些效应的关键因素——无性扩散能力知之甚少.经对上海境内互花米草的分布进行调查，发现目前上海分布有3592 hm2互花米草.采用定位研究方法，对崇明东滩互花米草无性扩散能力进行的研究表明，互花米草具有十分强的无性繁殖能力，经过9个月的生长，单株互花米草可以扩展到86-222株，最大扩散距离达到226 cm，互花米草集群的扩散距离平均为107 cm，最大扩散距离可以达到263 cm.最后针对其无性繁殖的特点，提出了一些防治策略.Abstract: Smooth cordgrass(Spartina alterniflora)is one of the most notorious invader plants and was listed in the alien invader species of China in 2003. The area of smooth cordgrass in Shanghai was about 3592 hm2. However, few information was available about its vegetative dispersal ability in the nature. In the present study, we surveyed the distribution in Shanghai and estimated the vegetative dispersal ability in Eastern End of Chongming Island, Shanghai. Strong vegetative growth was observed in individuals and patches of smooth cordgrass. After 9 months＇growth, smooth cordgrass individuals could develope 86 to 222 ramets per genet. The largest dispersal distance was 226 cm for individual smooth cordgrass. Mean dispersal distance of smooth cordgrass patches was 107 cm and the largest was 263 cm. At last, some strategies based on the observations had been proposed to control the rapid spreading of this species.
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