John Wiley & Sons, Ltd.

No observable effect of a glyphosate‐based herbicide on two top predators of temporal water bodies

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The application of pesticides has been implied to be involved in the world‐wide decline of biodiversity, but little is known about the influence of these chemicals on key predators of temporary wetlands. We examined the direct impacts of a frequently applied glyphosate‐based herbicide on larval Aeshna cyanea (Müller, 1764; Odonata, Insecta) and adult male Lissotriton vulgaris (Linnaeus, 1758; Caudata, Amphibia), two top predators of Central European ephemeral ponds. We measured effects of herbicide‐exposure on survival, behaviour, body mass change and predatory activity in an outdoors mesocosm experiment lasting 17 days. We observed no significant effects of exposure on either trait in either predator species. Our results suggest that the herbicide has no immediate effect at environmentally relevant concentrations on the studied predators and these can fulfil their top‐down regulatory role also in contaminated ecosystems. Environ Toxicol Chem © 2014 SETAC

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