Consumer co-evolution as an important component of the eco-evolutionary feedback
Consumer co-evolution as an important component of the eco-evolutionary feedback
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DOI：
10.1038/ncomms6226
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发表时间：
2014-10-01
影响因子：
16.6
通讯作者：
Becks, Lutz
中科院分区：
文献类型：
--
作者：
Hiltunen, Teppo;Becks, Lutz
最近，人们认识到生态相关性状的快速演变会显着改变消费者与其资源之间的相互作用，这是所有生态群落中的关键相互作用。虽然这些生态进化动态已被证明在猎物种群进化时发生，但在这种情况下，人们对捕食者进化以及捕食者和猎物之间的共同进化的作用知之甚少。在这里，我们通过操纵捕食者种群的初始性状变异，研究了细菌-纤毛虫微观世界实验中消费者共同进化对生态进化反馈的作用。对于共同进化的捕食者，与非共同进化的捕食者相比，猎物更快地进化出反捕食防御，性状值更加可变，并且在实验结束时捕食者和猎物的种群规模更大。最重要的是，捕食者特征的差异导致从进化驱动生态向生态驱动进化的转变。因此，我们证明捕食者共同进化对生态进化动力学具有重要影响。
Rapid evolution in ecologically relevant traits has recently been recognized to significantly alter the interaction between consumers and their resources, a key interaction in all ecological communities. While these eco-evolutionary dynamics have been shown to occur when prey populations are evolving, little is known about the role of predator evolution and co-evolution between predator and prey in this context. Here, we investigate the role of consumer co-evolution for eco-evolutionary feedback in bacteria-ciliate microcosm experiments by manipulating the initial trait variation in the predator populations. With co-evolved predators, prey evolve anti-predatory defences faster, trait values are more variable, and predator and prey population sizes are larger at the end of the experiment compared with the non-co-evolved predators. Most importantly, differences in predator traits results in a shift from evolution driving ecology, to ecology driving evolution. Thus we demonstrate that predator co-evolution has important effects on eco-evolutionary dynamics.