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Pesticide risk assessment in free-ranging bees is weather and landscape dependent

Author

Listed:
  • Mickaël Henry

    (INRA, UR406 Abeilles et Environnement
    UMT Protection des Abeilles dans l’Environnement, Site Agroparc)

  • Colette Bertrand

    (INRA, UR980 SAD Paysage
    CNRS et Université de Rennes 1, UMR6553 Ecosystèmes Biodiversité Evolution)

  • Violette Le Féon

    (INRA, UR406 Abeilles et Environnement
    UMT Protection des Abeilles dans l’Environnement, Site Agroparc)

  • Fabrice Requier

    (INRA, UE1255, UE Entomologie
    Centre d’Etudes Biologiques de Chizé, CNRS (USC-INRA 1339), UPR1934)

  • Jean-François Odoux

    (INRA, UE1255, UE Entomologie)

  • Pierrick Aupinel

    (INRA, UE1255, UE Entomologie)

  • Vincent Bretagnolle

    (Centre d’Etudes Biologiques de Chizé, CNRS (USC-INRA 1339), UPR1934)

  • Axel Decourtye

    (UMT Protection des Abeilles dans l’Environnement, Site Agroparc
    Association de Coordination Technique Agricole, Site Agroparc
    ITSAP-Institut de l’abeille, Site Agroparc)

Abstract

The risk assessment of plant protection products on pollinators is currently based on the evaluation of lethal doses through repeatable lethal toxicity laboratory trials. Recent advances in honeybee toxicology have, however, raised interest on assessing sublethal effects in free-ranging individuals. Here, we show that the sublethal effects of a neonicotinoid pesticide are modified in magnitude by environmental interactions specific to the landscape and time of exposure events. Field sublethal assessment is therefore context dependent and should be addressed in a temporally and spatially explicit way, especially regarding weather and landscape physiognomy. We further develop an analytical Effective Dose (ED) framework to help disentangle context-induced from treatment-induced effects and thus to alleviate uncertainty in field studies. Although the ED framework involves trials at concentrations above the expected field exposure levels, it allows to explicitly delineating the climatic and landscape contexts that should be targeted for in-depth higher tier risk assessment.

Suggested Citation

  • Mickaël Henry & Colette Bertrand & Violette Le Féon & Fabrice Requier & Jean-François Odoux & Pierrick Aupinel & Vincent Bretagnolle & Axel Decourtye, 2014. "Pesticide risk assessment in free-ranging bees is weather and landscape dependent," Nature Communications, Nature, vol. 5(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5359
    DOI: 10.1038/ncomms5359
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