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Investigation of Apis mellifera L. foraging behaviour to promote pollinator-friendly urban cities in Japan
Nagase, Ayako; Pouilloux, Lise; Francis, Frédéric et al.
2021VIII International Conference on Landscape and Urban Horticulture
 

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Keywords :
Biodiversity; Urban Greening; Urban Ecology
Abstract :
[en] Urbanization is a primary cause of pollinator biodiversity loss because it depletes floral and nesting resources. Since green areas are limited in urban zones, it is crucial to promote urban greening to provide pollen and nectar sources for pollinators. To investigate the floral resources of the urban environment, we used an efficient floral bio-sampler, Apis mellifera L., to identify the contribution of the urban road network to plant diversity. Pollen samples were collected every month at four study sites (Kiba, Kashiwanoha, Yaesu, and Nishichiba) during 2017 and 2018. DNA metabarcoding of pollen samples was used to identify the taxonomic composition of the floral resources. The results showed that 168 species belonging to 57 taxonomic families were acting as pollen sources, with a large number of honey-plant species in the Fabaceae (15 spp.), Asteraceae (14 spp.), or Rosaceae(8 spp.) families. Fifty-two per cent of the floral resources were alien species, 20% were cultivar species, 25% were native to Japan, and the remaining 3% were not identified. We observed that spontaneously colonizing plant species and street plantings were important sources for urban honeybees. We then located the spatial occurrences of the most foraged species by honeybees around hives. Sixty floral species on urban roads were targeted, and after 60 transects in May 2019, 24 of them were identified. Our results suggested that the urban road network could be not only the refuge of a majority of exotic pollinator species (63%) but also of a large proportion of cultivar species (25%) and a minority of indigenous species (13%). Urban greening programmes based on our findings could enhance biodiversity by creating green spaces suitable for all pollinators, whether generalists or specialists.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Nagase, Ayako;  Chiba University > College of Liberal Arts and Sciences
Pouilloux, Lise
Francis, Frédéric  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Noël, Grégoire  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Language :
English
Title :
Investigation of Apis mellifera L. foraging behaviour to promote pollinator-friendly urban cities in Japan
Publication date :
15 December 2021
Event name :
VIII International Conference on Landscape and Urban Horticulture
Event place :
Catania, Italy
Event date :
du 15 décembre 2021 au 17 décembre 2021
Available on ORBi :
since 20 September 2021

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