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

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

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.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • INRA National Institute of Agricultural Research
  • Chizé Centre for Biological Studies
  • Martin-Luther-Universität Halle-Wittenberg
  • Helmholtz Centre for Environmental Research
  • Uppsala universitet, Historiska institutionen
  • Swedish University of Agricultural Sciences
  • University of California, Davis
  • University of La Rochelle
  • Swedish Board of Agriculture
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Miljö- och naturvårdsvetenskap
Originalspråkengelska
Artikelnummer5446
TidskriftNature Communications
Volym9
Utgivningsnummer1
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa