How much is pollinator diversity and abundance related to floral traits in various grassland habitats?
Résumé
Pollination represents an important ecosystem service for plant reproduction, biodiversity conservation and human nutrition. However, insect populations have been declining for the last decades. The Polliflor project aims to achieve a functional characterization of agropastoral habitats for pollinator communities. The study was conducted on 4 regions with contrasted grassland habitats (mesophilic, mountain and chalk grasslands, marshlands), mown or grazed. Captures with a sweep net and identification of foraging pollinators were carried out from May to September 2020 (n = 2615 pollinators). For each pollinator, the species of the plant foraged was determined, as well as the measurement of plant traits: height, floral area, and nectariferous tube depth, to characterize floral resources at community level.
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