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Predicting the impact of invasive species: a look froward on the comparative functional response approach

Abstract : n the aim of optimizing management strategies, invasion science faces the need to prioritize future invasions with reliable, cost-effective and generalizable approaches. To predict the ecological impact of invasive species, it has recently been proposed to compare the relationship between resource consumption and resource availability, namely the functional response, between potential invaders and their trophic analogs inthe recipient ecosystem. After a brief description of the framework ofthe comparative functional response approach(CFR approach hereafter), wereview the functional responsecomparisons already available in the literature. We then investigate how the presence of conspecifics of the predators may alter predictions of the CFR approach. Indeed, the functional response experimentscarried under the CFR approachtypically involve a range of prey densities but a single predatorindividual whereas predators rarely forage alone in nature.Mutual interference between predators can generate predator dependence in the FR through the alteration of per capitaconsumption rates. Mutual interference is therefore likely to modulate the difference in functional response between an invasive predatorand its native counterpart, and accounting for mutual interference shouldpromote extrapolation of results to natural populations.
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Submitted on : Friday, July 21, 2017 - 3:35:11 PM
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  • HAL Id : hal-01567038, version 1


Vincent Medoc, Thierry Spataro. Predicting the impact of invasive species: a look froward on the comparative functional response approach. Revue d'Ecologie, Terre et Vie, Société nationale de protection de la nature, 2015, 70 (suppt 12), pp.114-126. ⟨hal-01567038⟩



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