Invasive plants versus their new and old neighbors: A mechanism for exotic invasion
Invasive plants versus their new and old neighbors: A mechanism for exotic invasion
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DOI：
10.1126/science.290.5491.521
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发表时间：
2000-10-20
期刊：
影响因子：
56.9
通讯作者：
Aschehoug, ET
中科院分区：
文献类型：
--
作者：
Callaway, RM;Aschehoug, ET
外来植物入侵之所以成功，主要是因为它们逃脱了天敌，而不是因为与新邻居的新互动。然而，我们发现，矢车菊弥漫，在北美的有毒杂草，有更强的负面影响，从北美的草种比密切相关的草种社区矢车菊是本地的。矢车菊对北美物种的优势似乎是由于其根系分泌物的影响以及这些根系分泌物如何影响资源竞争的差异。我们的研究结果可能有助于解释为什么一些外来物种如此成功地入侵自然植物群落。
Invading exotic plants are thought to succeed primarily because they have escaped their natural enemies, not because of novel interactions with their new neighbors. However, we find that Centaurea diffuse, a noxious weed in North America, has much stronger negative effects on grass species from North America than on closely related grass species from communities to which Centaurea is native. Centaurea's advantage against North American species appears to be due to differences in the effects of its root exudates and how these root exudates affect competition for resources. Our results may help to explain why some exotic species so successfully invade natural plant communities.