Possible Spillover of Pathogens between Bee Communities Foraging on the Same Floral Resource - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Insects Année : 2021

Possible Spillover of Pathogens between Bee Communities Foraging on the Same Floral Resource

Anne Dalmon
Connectez-vous pour contacter l'auteur
Virgine Diévart
  • Fonction : Auteur
  • PersonId : 1207286
Romain Fouque
  • Fonction : Auteur
  • PersonId : 1090057
Bernard E Vaissière
Laurent Guilbaud
  • Fonction : Auteur
  • PersonId : 1206689
Yves Le Conte
Mickaël Henry

Résumé

Floral resource availability is one of the keys to preserving the health of bee communities. However, flowers also present a risk of pathogen transmission, as infected pollinators could deposit pathogens while foraging, exposing other pollinators to infection via the consumption of contaminated nectar or pollen. Here, we studied, over time, the prevalence of seven viruses in bee communities that share the same small surface of floral resource in order to assess the risk of virus spillover. In total, 2057 bee specimens from 30 species were caught, identified and checked for the presence of viruses. Specimens from the Halictidae family were the dominant wild bees. The prevalence of viruses was quite high: at least one virus was detected in 78% of the samples, and co-infections were frequent. The genetic diversity of the viruses was also investigated to look for the possible association of geographic origin or host with shared ancestry. Viruses are known to contribute to bee population decline. Possible spillover is suspected from the co-occurrence of viruses in wild bees and honey bees. In order to study the risk of virus transmission between wild and managed bee species sharing the same floral resource, we tried to maximize the possible cross-infections using Phacelia tanacetifolia, which is highly attractive to honey bees and a broad range of wild bee species. Virus prevalence was compared over two years in Southern France. A total of 1137 wild bees from 29 wild bee species (based on COI barcoding) and 920 honey bees (Apis mellifera) were checked for the seven most common honey bee RNA viruses. Halictid bees were the most abundant. Co-infections were frequent, and Sacbrood virus (SBV), Black queen cell virus (BQCV), Acute bee paralysis virus (ABPV) and Israeli acute paralysis virus (IAPV) were widespread in the hymenopteran pollinator community. Conversely, Deformed wing virus (DWV) was detected at low levels in wild bees, whereas it was highly prevalent in honey bees (78.3% of the samples). Both wild bee and honey bee virus isolates were sequenced to look for possible hostspecificity or geographical structuring. ABPV phylogeny suggested a specific cluster for Eucera bees, while isolates of DWV from bumble bees (Bombus spp.) clustered together with honey bee isolates, suggesting a possible spillover.
Fichier principal
Vignette du fichier
2021 - Dalmon - Insects.pdf (3.23 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03128977 , version 1 (02-02-2021)

Licence

Paternité

Identifiants

Citer

Anne Dalmon, Virgine Diévart, Maxime Thomasson, Romain Fouque, Bernard E Vaissière, et al.. Possible Spillover of Pathogens between Bee Communities Foraging on the Same Floral Resource. Insects, 2021, 12 (2), pp.122. ⟨10.3390/insects12020122⟩. ⟨hal-03128977⟩
14 Consultations
55 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More