Field-level clothianidin exposure affects bumblebees but generally not their pathogens.

Autor: Wintermantel D; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden. dywintermantel@gmail.com.; INRA, UE 1255 APIS, Le Magneraud, 17700, Surgères, France. dywintermantel@gmail.com.; Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS & Université de La Rochelle, 79360, Villiers-en-Bois, France. dywintermantel@gmail.com., Locke B; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden., Andersson GKS; Department of Biology, Lund University, 223 62, Lund, Sweden.; Centre for Environmental and Climate Research, Lund University, 223 62, Lund, Sweden., Semberg E; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden., Forsgren E; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden., Osterman J; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden.; Martin Luther University of Halle-Wittenberg, Institute of Biology, 06120, Halle, Germany.; Department of Computational Landscape Ecology, Helmholtz Centre for Environmental Research-UFZ Leipzig, ESCALATE, 04318, Leipzig, Germany., Rahbek Pedersen T; Swedish Board of Agriculture, 551 82, Jönköping, Sweden., Bommarco R; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden., Smith HG; Department of Biology, Lund University, 223 62, Lund, Sweden.; Centre for Environmental and Climate Research, Lund University, 223 62, Lund, Sweden., Rundlöf M; Department of Biology, Lund University, 223 62, Lund, Sweden.; Department of Entomology and Nematology, University of California, Davis, CA, 95616, USA., de Miranda JR; Department of Ecology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2018 Dec 21; Vol. 9 (1), pp. 5446. Date of Electronic Publication: 2018 Dec 21.
DOI: 10.1038/s41467-018-07914-3
Abstrakt: Neonicotinoids are implicated in bee declines and laboratory studies imply that they impair the bee immune system, thereby precipitating a rise in pathogen levels. To establish whether such synergisms reduce bee performance in real-world agricultural landscapes, we analysed the microbial composition of the bumblebee (Bombus terrestris) samples from our recent landscape study on the impacts of field-level clothianidin exposure. We related clothianidin exposure and microbial composition to both individual- and colony-level performance parameters, to better understand the direct and indirect mechanistic effects of neonicotinoid exposure on bumblebees. We show that exposure to clothianidin from seed-coated oilseed rape reduces bumblebee size and numbers, particularly of reproductives. However, exposure does not affect the levels of non-pathogenic bacteria or viruses, nor induce rises in the levels or virulence of intracellular parasites. We conclude that field exposure to the neonicotinoid clothianidin affects bumblebee performance but generally not their pathogenic or beneficial microbiota.
Databáze: MEDLINE
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