Ecology - Darwin's naturalization hypothesis challenged
Ecology - Darwin's naturalization hypothesis challenged
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DOI：
10.1038/417608a
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发表时间：
2002-06-06
期刊：
影响因子：
64.8
通讯作者：
Williams, PA
中科院分区：
文献类型：
--
作者：
Duncan, RP;Williams, PA
自然化的植物可以产生重大的生态和经济影响，但它们只占人类引入新地区的植物物种的一小部分。达尔文提出，由于引进植物必须与其近缘的原生物种竞争，或者更容易受到原生食草动物或病原体的攻击，因此引进的植物物种不太可能在有同源原生物种的地方建立自我维持的野生种群，这一理论被称为达尔文的归化假说。在这里，我们分析了一个完整的种子植物物种的名单，已被引入新西兰，并发现那些同源的亲戚是显着更多，而不是更少，可能归化-也许是因为他们与他们的本地亲戚的特点，预先适应他们的新环境。
Naturalized plants can have a significant ecological and economic impact, yet they comprise only a fraction of the plant species introduced into new areas by humans. Darwin proposed that introduced plant species will be less likely to establish a self-sustaining wild population in places with congeneric native species because the introduced plants have to compete with their close native relatives, or are more likely to be attacked by native herbivores or pathogens,, a theory known as Darwin's naturalization hypothesis. Here we analyse a complete list of seed-plant species that have been introduced to New Zealand and find that those with congeneric relatives are significantly more, not less, likely to naturalize — perhaps because they share with their native relatives traits that pre-adapt them to their new environment.