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, Emily N Runnion Department of Evolution, Ecology, and Organismal Biology, The Ohio State University , 300 Aronoff Laboratories, 318 W. 12th Avenue , Columbus, OH 4321, USA Corresponding author, mail: Runnion.4@osu.edu Search for other works by this author on: Oxford Academic James P Strange Department of Entomology, The Ohio State University , Columbus, OH 2021, USA Search for other works by this author on: Oxford Academic Frances S Sivakoff Department of Evolution, Ecology, and Organismal Biology, The Ohio State University , 300 Aronoff Laboratories, 318 W. 12th Avenue , Columbus, OH 4321, USA Search for other works by this author on: Oxford Academic
https://orcid.org/0009-0001-8416-164X Environmental Entomology, Volume 53, Issue 4, August 2024, Pages 706–715, https://doi.org/10.1093/ee/nvae049
Published:
27 May 2024
Article history
Received:
30 October 2023
Revision received:
17 April 2024
Accepted:
07 May 2024
Published:
27 May 2024
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Emily N Runnion, James P Strange, Frances S Sivakoff, Consumption of pollen contaminated with field-realistic concentrations of fungicide causes sublethal effects in Bombus impatiens (Hymenoptera: Apidae) microcolonies, Environmental Entomology, Volume 53, Issue 4, August 2024, Pages 706–715, https://doi.org/10.1093/ee/nvae049
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Abstract
Bumble bees are declining across the globe. The causes of this decline have been attributed to a variety of stressors, including pesticides. Fungicides are a type of pesticide that has been understudied in the context of bumble bee health. As a result, fungicides are often applied to flowering plants without consideration of pollinator exposure. Recent work demonstrates that fungicides have sublethal effects in bumble bees, but little is known about how much fungicide it takes to cause these sublethal effects. To address this gap in the literature, we fed microcolonies of the common eastern bumble bee (Bombus impatiens CressonHymenoptera: ApidaeHymenoptera: ApidaeHymenoptera: ApidaeHymenoptera: Apidae) pollen contaminated with a range of fungicide concentrations. We chose these concentrations based on the range of fungicide concentrations in pollen and nectar that were reported in the literature. Results revealed that later-stage pupae and newly emerged males are potentially sensitive to fungicide exposure, showing smaller size and reduced fat reserves at intermediate levels of contamination. Compared to the control, intermediated levels of fungicide-contaminated pollen led to increased pupal mortality and delayed male emergence. Contrary to expectations, higher fungicide levels did not exhibit a linear relationship with negative impacts, suggesting nuanced effects. Because body size and emergence timing are important aspects of bumble bee reproductive behavior, results have implications for mating success, potentially disrupting colony development.
bumble bee, microcolony, risk assessment, sublethal effect, fungicide
© The Author(s) 2024. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/pages/standard-publication-reuse-rights)
Issue Section:
Pollinator Ecology and Management
Subject Editor: Sandy DeBano Sandy DeBano Subject Editor Search for other works by this author on: Oxford Academic
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