Plant resistance reduces the strength of consumptive and non-consumptive effects of predators on aphids

The Journal of Animal Ecology
Mônica F Kersch-Becker, Jennifer S Thaler

Abstract

1. The impact of predators on prey has traditionally been attributed to the act of consumption. Prey responses to the presence of the predator (non-consumptive effects), however, can be as important as predation itself. While plant defences are known to influence predator-prey interactions, their relative effects on consumptive vs. non-consumptive effects are not well understood. 2. We evaluated the consequences of plant resistance and predators (Hippodamia convergens) on the mass, number of nymphs, population growth, density and dispersal of aphids (Macrosiphum euphorbiae). We tested for the effects of plant resistance on non-consumptive and consumptive effects of predators on aphid performance and dispersal using a combination of path analysis and experimental manipulation of predation risk. 3. We manipulated plant resistance using genetically modified lines of tomato (Solanum lycopersicum) that vary incrementally in the expression of the jasmonate pathway, which mediates induced resistance to insects and manipulated aphid exposure to lethal and risk predators. Predation risk predators had mandibles impaired to prevent killing. 4. Plant resistance reduced predation rate (consumptive effect) on high resistance plants. As a con...Continue Reading

Associated Datasets

References

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Citations

Apr 11, 2019·The Journal of Animal Ecology·Mônica F Kersch-Becker, Jennifer S Thaler
Sep 8, 2017·Proceedings. Biological Sciences·Mônica F Kersch-BeckerJennifer S Thaler
Sep 5, 2019·Ecology·Robert E ClarkDavid W Crowder
May 13, 2020·Ecology Letters·Ian S PearseMarjorie G Weber
Jun 6, 2018·Oecologia·Mônica F Kersch-BeckerGustavo Q Romero
Sep 10, 2020·Ecology Letters·Michael Culshaw-MaurerJay A Rosenheim
Jan 11, 2021·Ecological Applications : a Publication of the Ecological Society of America·Kayleigh C HauriWilliam C Wetzel
Jun 13, 2017·Current Opinion in Insect Science·Sara L Hermann, Douglas A Landis

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