期刊
ECOLOGICAL ENGINEERING
卷 35, 期 5, 页码 800-809出版社
ELSEVIER
DOI: 10.1016/j.ecoleng.2008.12.004
关键词
Dispersal; Plant invasion; Scirpus mariqueter; Seed bank; Spartina alterniflora
资金
- National Basic Research Program of China [2006CB403305]
- National Science Foundation of China [30670330]
- Ministry of Education of China [105063]
- Science and Technology Commission of Shanghai [07dz12038, 20050246013]
We investigated dynamics and spatial distribution of Scirpus mariqueter and Spartina alterniflora seed banks at Chongming Dongtan in the Yangtze River estuary, China. Five sites along an elevational gradient were chosen, one in each of the main zones (mudflat, Scirpus monoculture, Scirpus-Spartina mixture, Spartina monoculture and Spartina-Phragmites mixture). Three surveys were performed just after seed rain, before germination and after germination, respectively During the period of November 2005 to May 2006, soil seed density of Scirpus mariqueter declined by 36%, and that of Spartina alterniflora by 58%. The spatial distributions of their seed banks were also different. Soil seed density of Scirpus mariqueter was not determined directly by seed production, but positively correlated with total aboveground biomass of the whole plant community. On the contrary, soil seed density of Spartina alterniflora just after seed rain (November) was significantly correlated with seed production, but had a poor relationship with the community's aboveground biomass. Our results indicated that other factors such as tidal movement might have had great influence on dispersal of Scirpus mariqueter, which would also affect its population dynamics. The understanding of this process can help us improve the conservation and restoration efforts. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据