Ensuring access to high-quality resources reduces the impacts of heat stress on bees
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2019
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Pollinators are experiencing declines globally, negatively affecting the reproduction of wild plants and
crop production. Well-known drivers of these declines include climatic and nutritional stresses, such
as a change of dietary resources due to the degradation of habitat quality. Understanding potential
synergies between these two important drivers is needed to improve predictive models of the future
effects of climate change on pollinator declines. Here, bumblebee colony bioassays were used to
evaluate the interactive effects of heat stress, a reduction of dietary resource quality, and colony size.
Using a total of 117 colonies, we applied a fully crossed experiment to test the effect of three dietary
quality levels under three levels of heat stress with two colony sizes. Both nutritional and heat stress
reduced colony development resulting in a lower investment in offspring production. Small colonies
were much more sensitive to heat and nutritional stresses than large ones, possibly because a higher
percentage of workers helps maintain social homeostasis. Strikingly, the effects of heat stress were far
less pronounced for small colonies fed with suitable diets. Overall, our study suggests that landscape
management actions that ensure access to high-quality resources could reduce the impacts of heat
stress on bee decline.
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VANDERPLANCK, Maryse; MARTINET, Baptiste; CARVALHEIRO, Luísa Gigante; RASMONT, Pierre; BARRAUD, Alexandre; RENAUDEAU, Coraline; MICHEZ, Denis. Ensuring access to high-quality resources reduces the impacts of heat stress on bees. Scientific Reports, New York, v. 9, e12596, 2019. DOI: 10.1038/s41598-019-49025-z . Disponível em: file:///C:/Users/Usu%C3%A1rio/Downloads/s41598-019-49025-z.pdf. Acesso em: 13 jan. 2023.