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- W2085474605 abstract "Multiple-predator limitation of prey populations may be mediated by both predator–predator interactions and vegetation structure. Antagonistic interactions among predators, such as intraguild predation, can diminish the collective impact of natural enemies on prey population size. However, structurally complex vegetation may moderate such interactions by providing a refuge for predators, thereby enhancing prey suppression. Specifically, we examined the combined impact of two salt-marsh-inhabiting invertebrate predators, the mirid Tytthus vagus and the wolf spider Pardosa littoralis, on suppression of their shared prey, the planthopper Prokelisia dolus, in simple (thatch-free) and complex (thatch-rich) vegetation. In structurally simple habitats in the laboratory, the predators interacted antagonistically, due to the intraguild predation of mirids by spiders, and predation pressure on the planthopper population was relaxed. However, structurally complex habitats dampened this antagonistic interaction by providing a refuge for mirids from spider predation, thereby increasing the combined effectiveness of these predators in suppressing planthopper populations. Consistent with our laboratory results, we found enhanced co-occurrence of these predators in complex habitats in the field, where mirids are apparently at lower risk from spider predation and outbreaks of planthoppers are less likely. In contrast, in simple habitats, mirids were relatively less abundant, a finding consistent with the expectation of increased intraguild predation from spiders. Therefore, in this salt marsh system, complex vegetation diminished the occurrence of intraguild predation between mirids and spiders and increased overall enemy impact on their shared herbivore prey, demonstrating for the first time that plants can mediate enemy effects on insect herbivores by influencing predator–predator interactions." @default.
- W2085474605 created "2016-06-24" @default.
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- W2085474605 date "2002-03-01" @default.
- W2085474605 modified "2023-10-11" @default.
- W2085474605 title "INTRAGUILD PREDATION DIMINISHED IN COMPLEX-STRUCTURED VEGETATION: IMPLICATIONS FOR PREY SUPPRESSION" @default.
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- W2085474605 doi "https://doi.org/10.1890/0012-9658(2002)083[0643:ipdics]2.0.co;2" @default.
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