Do major host shifts spark diversification in butterflies?

Do major host shifts spark diversification in butterflies?
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主要宿主的转变是否会引发蝴蝶的多样化?

DOI:
10.1002/ece3.6116
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发表时间:
2020
影响因子:
2.6
通讯作者:
Hardy, Nate B.
Hardy, Nate B.
中科院分区:
生物学2区
文献类型:
--
作者:
Kaczvinsky, Chloe;Hardy, Nate B.

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逃逸和辐射假说认为,草食性昆虫及其寄主植物通过拮抗的共同进化适应辐射而多样化。50多年来,它启发了关于食草性昆虫宏观进化的预测,但直到最近,资源才开始到位,用于对这些预测进行严格测试。在这里,通过对若虫类蝴蝶的比较系统发育分析,我们检验了其中的两个预测:主要的寄主转换倾向于增加物种多样性,并且这种增加将与特定的新寄主协会提供的生态机会的范围成比例。我们发现,总的来说,寄主使用的重大变化对蝴蝶多样性的影响与预测相反;尽管一些新的寄主组合的进化似乎可以导致物种形成的短期爆发,但总的来说,寄主使用的重大变化往往与蝴蝶物种丰富度的长期显著下降有关。
The Escape and Radiate Hypothesis posits that herbivorous insects and their host plants diversify through antagonistic coevolutionary adaptive radiation. For more than 50 years, it has inspired predictions about herbivorous insect macro‐evolution, but only recently have the resources begun to fall into place for rigorous testing of those predictions. Here, with comparative phylogenetic analyses of nymphalid butterflies, we test two of these predictions: that major host switches tend to increase species diversification and that such increases will be proportional to the scope of ecological opportunity afforded by a particular novel host association. We find that by and large the effect of major host‐use changes on butterfly diversity is the opposite of what was predicted; although it appears that the evolution of a few novel host associations can cause short‐term bursts of speciation, in general, major changes in host use tend to be linked to significant long‐term decreases in butterfly species richness.
植物食性昆虫的微观和宏观进化权衡
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