Understanding biodiversity effects on prey in multi-enemy systems
Understanding biodiversity effects on prey in multi-enemy systems
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DOI：
10.1111/j.1461-0248.2006.00945.x
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发表时间：
2006-09-01
期刊：
影响因子：
8.8
通讯作者：
Thomas, Matthew B.
中科院分区：
文献类型：
--
作者：
Casula, Paolo;Wilby, Andrew;Thomas, Matthew B.
生物多样性-生态系统功能理论预测，天敌丰富度的增加会提高捕食率，因为天敌物种的功能互补性。然而，一些研究表明，天敌之间的生态相互作用可能会导致复杂的影响，天敌多样性对猎物的消费。因此，在了解天敌多样性的影响的挑战是预测多个敌人的消费率，同时考虑到所产生的影响模式的猎物使用与物种的相互作用。在这里，我们展示了如何互补和冗余的猎物使用模式的结果，分别在添加剂和饱和效应，以及如何生态相互作用，如表型生态位的变化，协同作用和intraguild捕食扩大范围的结果，包括零，协同和拮抗作用。本研究提供了一个简单的理论框架，可应用于实验研究，以推断天敌多样性对猎物的生物学机制。
Biodiversity-ecosystem functioning theory would predict that increasing natural enemy richness should enhance prey consumption rate due to functional complementarity of enemy species. However, several studies show that ecological interactions among natural enemies may result in complex effects of enemy diversity on prey consumption. Therefore, the challenge in understanding natural enemy diversity effects is to predict consumption rates of multiple enemies taking into account effects arising from patterns of prey use together with species interactions. Here, we show how complementary and redundant prey use patterns result in additive and saturating effects, respectively, and how ecological interactions such as phenotypic niche shifts, synergy and intraguild predation enlarge the range of outcomes to include null, synergistic and antagonistic effects. This study provides a simple theoretical framework that can be applied to experimental studies to infer the biological mechanisms underlying natural enemy diversity effects on prey.