Flower preferences and pollen transport networks for cavity-nesting solitary bees: Implications for the design of agri-environment schemes

Ecology and Evolution
Catherine E A GrestyKatherine J Willis

Abstract

Floral foraging resources are valuable for pollinator conservation on farmland, and their provision is encouraged by agri-environment schemes in many countries. Across Europe, wildflower seed mixtures are widely sown on farmland to encourage pollinators, but the extent to which key pollinator groups such as solitary bees exploit and benefit from these resources is unclear. We used high-throughput sequencing of 164 pollen samples extracted from the brood cells of six common cavity-nesting solitary bee species (Osmia bicornis, Osmia caerulescens, Megachile versicolor, Megachile ligniseca, Megachile centuncularis and Hylaeus confusus) which are widely distributed across the UK and Europe. We documented their pollen use across 19 farms in southern England, UK, revealing their forage plants and examining the structure of their pollen transport networks. Of the 32 plant species included currently in sown wildflower mixes, 15 were recorded as present within close foraging range of the bees on the study farms, but only Ranunculus acris L. was identified within the pollen samples. Rosa canina L. was the most commonly found of the 23 plant species identified in the pollen samples, suggesting that, in addition to providing a nesting resou...Continue Reading

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Citations

Oct 15, 2019·Annual Review of Entomology·R RaderD W Inouye
Aug 4, 2019·Insects·Joseph Belsky, Neelendra K Joshi
Jun 20, 2020·Emerging Topics in Life Sciences·Daniel P CariveauGabriella L Pardee
Aug 18, 2020·The New Phytologist·Susanne DunkerTiffany M Knight
Jan 16, 2021·Ecotoxicology and Environmental Safety·Samuel BoffDaniela Lupi
Aug 28, 2021·Insects·Shaden A M KhalifaHesham R El-Seedi

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Methods Mentioned

BETA
light microscopy
PCR

Software Mentioned

R
FastQ
R scripts
CUTADAPT
MASS
MOTHUR
ggpubr
ggpubr R
BLAST

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