Preference and prey switching in a generalist predator attacking local and invasive alien pests.
Preference and prey switching in a generalist predator attacking local and invasive alien pests.
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DOI：
10.1371/journal.pone.0082231
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Desneux N
中科院分区：
文献类型：
--
作者：
Jaworski CC;Bompard A;Genies L;Amiens-Desneux E;Desneux N
入侵害虫物种可能会强烈影响农业生态系统中的生物相互作用。由于捕食者介导的猎物之间的间接相互作用，通才捕食者捕食新入侵害虫的能力可能会导致当地害虫物种的种群动态发生巨大变化。在短时间内，这种间接相互作用的性质和强度在很大程度上取决于猎物之间的偏好和捕食者的行为模式。在实验室条件下，我们评估了多面性捕食者Macrolophus pygmaeus Rambur（异翅目：Miridae）同时遇到当地番茄害虫烟粉虱（Bemisia tabaci）（半翅目：粉虱科）和外来入侵害虫Tutaabsoluta（Meyrick）（鳞翅目： 蜈蚣科）。我们测试了本地与外来猎物数量的各种比率，测量捕食者从一种猎物到另一种猎物的转换，并评估哪些条件（例如猎物物种丰度和猎物发育阶段）可能有利于这种猎物转换。侏儒巨蜥的总捕食活动受到猎物复合体中绝对巨蜥的影响，与成年和幼年捕食者相比，效果相反。捕食者对烟粉虱卵和烟粉虱若虫表现出类似的偏好，但烟粉虱幼虫显然受到的攻击较少。然而，猎物偏好很大程度上取决于猎物的相对丰度，对最丰富的猎物的捕食率不成比例地高，而对最稀有的猎物的捕食率则不成比例地低。结合最近的一项配套研究（群体生态学）的结果，对侏儒烟粉虱猎物转换的深入了解可能有助于番茄作物的害虫综合防治，特别是对烟粉虱和绝对烟粉虱的最佳同步管理，这两种物质经常同时出现在番茄上。
Invasive pest species may strongly affect biotic interactions in agro-ecosystems. The ability of generalist predators to prey on new invasive pests may result in drastic changes in the population dynamics of local pest species owing to predator-mediated indirect interactions among prey. On a short time scale, the nature and strength of such indirect interactions depend largely on preferences between prey and on predator behavior patterns. Under laboratory conditions we evaluated the prey preference of the generalist predator Macrolophus pygmaeus Rambur (Heteroptera: Miridae) when it encounters simultaneously the local tomato pest Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) and the invasive alien pest Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae). We tested various ratios of local vs. alien prey numbers, measuring switching by the predator from one prey to the other, and assessing what conditions (e.g. prey species abundance and prey development stage) may favor such prey switching. The total predation activity of M. pygmaeus was affected by the presence of T. absoluta in the prey complex with an opposite effect when comparing adult and juvenile predators. The predator showed similar preference toward T. absoluta eggs and B. tabaci nymphs, but T. absoluta larvae were clearly less attacked. However, prey preference strongly depended on prey relative abundance with a disproportionately high predation on the most abundant prey and disproportionately low predation on the rarest prey. Together with the findings of a recent companion study (, Population Ecology), the insight obtained on M. pygmaeus prey switching may be useful for Integrated Pest Management in tomato crops, notably for optimal simultaneous management of B. tabaci and T. absoluta, which very frequently co-occur on tomato.
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影响因子：
1.7
作者：
Bompard, Anais;Jaworski, Coline C.;Desneux, Nicolas
通讯作者：
Desneux, Nicolas
影响因子：
3.7
作者：
Li Y;Ke Z;Wang S;Smith GR;Liu X
通讯作者：
Liu X
影响因子：
2.3
作者：
Causton, CE;Peck, SB;Landry, B
通讯作者：
Landry, B
影响因子：
3.4
作者：
Chaneton, EJ;Bonsall, MB
通讯作者：
Bonsall, MB
影响因子：
4.2
作者：
Fantinou, A. A.;Perdikis, D. Ch.;Maselou, D. A.
通讯作者：
Maselou, D. A.