Predation and avoidance behavior of the pea aphid Acyrthosiphon pisum confronted with native and invasive lady beetles in Europe
Predation and avoidance behavior of the pea aphid Acyrthosiphon pisum confronted with native and invasive lady beetles in Europe
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DOI：
10.1007/s10530-020-02209-5
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发表时间：
2020-01
影响因子：
2.9
通讯作者：
A. Ünlü;Jördis F. Terlau;Roman Bucher
中科院分区：
文献类型：
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作者：
A. Ünlü;Jördis F. Terlau;Roman Bucher
入侵物种是全球生物多样性丧失的主要驱动因素。然而，我们常常缺乏对为什么一些非本地物种变得具有入侵性的机制的理解。缺少入侵性捕食者和本地猎物之间的共同进化历史可能会导致本地猎物缺乏对捕食者的回避，从而导致入侵性捕食者的消耗率更高。我们比较了四种欧洲本土瓢虫物种和入侵瓢虫物种Harmonia axyridisPallas（鞘翅目：瓢虫科）的捕食率，使用本地豌豆蚜Acyrthosiphon pisumHarris（半翅目：蚜科）作为猎物。在这里，我们还量化了 A 的初始下降。来自寄主植物的豌豆。在另一项植物选择实验中，我们测试了带有瓢虫线索的植物对蚜虫的回避情况。捕食的差异由捕食者的体型大小决定。入侵瓢虫物种之间蚜虫的初始脱落没有差异。 axyridis 和剩余的本土瓢虫物种。然而，A.豌豆对H没有表现出回避行为。 axyridiscue，但却是最贪婪的本地物种的线索。因此，相对较大的体型和蚜虫缺乏化学信号回避可能有利于入侵性蚜虫。异色菊。
Invasive species are a major driver of global biodiversity loss. However, we often lack a mechanistic understanding why some non-native species become invasive. Missing coevolutionary history between invasive predators and native prey can lead to a lack of predator avoidance by native prey and consequently higher consumption rates by invasive predators. We compared predation rates of four native European lady beetle species and the invasive lady beetle speciesHarmonia axyridisPallas (Coleoptera: Coccinellidae), using the native pea aphidAcyrthosiphon pisumHarris (Hemiptera: Aphididae) for prey. Here, we also quantified initial dropping ofA. pisumfrom host plants. In an additional plant-choice experiment, we tested for aphid avoidance of plants bearing lady beetle cues. Differences in predation were determined by predator body size. Initial dropping of aphids did not differ between the invasive lady beetle speciesH. axyridisand the remaining native lady beetle species. However,A. pisumshowed no avoidance behavior towardsH. axyridiscues, but to cues of the most voracious native species. Thus, relatively large body size and missing chemical cue avoidance by aphids can benefit the invasiveH. axyridis.