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首页> 外文期刊>Ecology letters >An inherited virus influences the coexistence of parasitoid species through behaviour manipulation
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An inherited virus influences the coexistence of parasitoid species through behaviour manipulation

机译：遗传病毒通过行为操纵影响寄生虫物种的共存

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摘要

The potential role of pathogens or parasites in maintaining species coexistence is well documented. However, the impact of vertically transmitted symbionts, that can markedly modify their host's biology, is largely unknown. Some females of the Drosophila parasitoid Leptopilina boulardi are infected with an inherited virus (LbFV). The virus forces females to lay supernumerary eggs in already parasitised hosts, thus allowing its horizontal transmission. Using two independent experimental procedures, we found that LbFV impacts inter-specific competition between L. boulardi and the related L. heterotoma. While L. boulardi rapidly outcompetes L. heterotoma in the absence of the virus, L. heterotoma was able to maintain or even to eliminate L. boulardi in the presence of LbFV. By forcing females to superparasitise, LbFV induced egg wastage in L. boulardi thus explaining its impact on the competition outcome. We conclude that this symbiont whose transmission is L. boulardi-density-dependant may affect the coexistence of Leptopilina species.
机译：病原体或寄生虫在维持物种共存中的潜在作用已得到充分证明。但是，垂直传播共生体的影响会显着改变宿主的生物学特性，目前尚不清楚。果蝇寄生性果蝇Leptopilina boulardi的某些雌性感染了遗传病毒（LbFV）。该病毒迫使雌性在已经寄生的宿主体内产下多余的卵，从而使其水平传播。使用两个独立的实验程序，我们发现LbFV影响boulardi和相关的L.异种瘤之间的种间竞争。尽管在不存在病毒的情况下博拉氏乳杆菌迅速地胜过了异双歧杆菌，但在存在LbFV的情况下，异种乳杆菌却能够维持甚至消除博拉氏乳杆菌。通过强迫雌性过度寄生，LbFV引起了布拉氏乳杆菌卵的浪费，从而解释了其对竞争结果的影响。我们得出的结论是，这种共生体的传播依赖于布拉迪氏菌的密度依赖性，可能会影响钩端螺旋体物种的共存。

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