Increasing biodiversity and winter survival of bumblebees for better yields

Potential causes of the current native pollinator decline observed around the world include pesticide uses, lost of floral diversity and landscape simplification. In apple production, apple trees blossom soon in spring, too early for many native pollinator species, and orchards often represent undiversified floral landscapes, two characteristics limiting their attractiveness for pollinators. Actually, much of the pollination is done by the use of the honey bee (Apis mellifera). But this work could be done by native pollinators such as bumblebees Bombus spp., more efficient than honey bees, and already working early in spring, but generally rare in orchards because of the reduced floral diversity. This three-year-project, in collaboration with apple producers from Montérégie and Estrie, was settled last spring by Amélie Gervais, a PhD student co-supervised by Valérie Fournier and Marc Bélisle. This study will quantify the impacts of flower planting – such as windbreaks, riparian strips and flowerbeds – on the diversity of native bumblebees and on their winter survival. Ultimately, this project will evaluate the biological and economic impacts of habitat enhancements to support pollinators in apple production.
Source de financement: MAPAQ
Ajouté par: Audrey Bourret 2018-01-16