Functions of canopy-stored seeds in the dune ecosystem: conclusions from Agriophyllum squarrosum and Artemisia wudanica
Functions of canopy-stored seeds in the dune ecosystem: conclusions from Agriophyllum squarrosum and Artemisia wudanica
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DOI：
10.1007/s11515-009-0047-0
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发表时间：
2009-08
期刊：
影响因子：
--
通讯作者：
Zhimin Liu;Xiumei Wang
中科院分区：
文献类型：
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作者：
Zhimin Liu;Xiumei Wang
在沙丘生态系统中发现种子释放延迟。然而，其功能却鲜有报道。为了了解沙粒释放延迟在风沙流中的作用，在内蒙古的一个活动沙丘上，对一年生沙生植物沙蓬（藜科）和沙生亚灌木武当蒿（菊科）的种子释放延迟进行了研究。沙丘生态系统中种子延迟释放的主要原因是：（1）推迟部分种子的扩散，使其推迟到风季结束和生长季开始;（2）调节种子库的时空格局;（3）帮助沙生植物适应活动沙丘的风蚀;（4）帮助沙生植物实现远距离扩散。
Delay in seed release is found in the dune ecosystem. However, its functions have been rarely reported. We studied delayed seed release in theAgriophyllum squarrosum(Chenopodiaceae), an annual psammophyte, and theArtemisia wudanica(Asteraceae), a psammophilous subshrub in an active sand dune field in Inner Mongolia, China, to get insights into its functions in dealing with sand movement. We concluded that delay in seed release in the dune ecosystem are as follows: (1) postponing dispersal of a portion of seeds until the end of windy season and the start of growing season; (2) regulating the spatiotemporal pattern of seed bank; (3) helping psammophytes adapt to wind erosion on the active sand dune; and (4) helping psammophytes realize long-distance dispersal.