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Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants

1. Insect pollinators are essential for both the production of a large proportion of world crops and the health of natural ecosystems. As important pollinators, bumblebees must learn to forage on flowers to feed both themselves and provision their colonies. 2. Increased use of pesticides has caused...

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Autores principales: Stanley, Dara A., Raine, Nigel E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4950133/
https://www.ncbi.nlm.nih.gov/pubmed/27512241
http://dx.doi.org/10.1111/1365-2435.12644
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author Stanley, Dara A.
Raine, Nigel E.
author_facet Stanley, Dara A.
Raine, Nigel E.
author_sort Stanley, Dara A.
collection PubMed
description 1. Insect pollinators are essential for both the production of a large proportion of world crops and the health of natural ecosystems. As important pollinators, bumblebees must learn to forage on flowers to feed both themselves and provision their colonies. 2. Increased use of pesticides has caused concern over sublethal effects on bees, such as impacts on reproduction or learning ability. However, little is known about how sublethal exposure to field‐realistic levels of pesticide might affect the ability of bees to visit and manipulate flowers. 3. We observed the behaviour of individual bumblebees from colonies chronically exposed to a neonicotinoid pesticide (10 ppb thiamethoxam) or control solutions foraging for the first time on an array of morphologically complex wildflowers (Lotus corniculatus and Trifolium repens) in an outdoor flight arena. 4. We found that more bees released from pesticide‐treated colonies became foragers, and that they visited more L. corniculatus flowers than controls. Interestingly, bees exposed to pesticide collected pollen more often than controls, but control bees learnt to handle flowers efficiently after fewer learning visits than bees exposed to pesticide. There were also different initial floral preferences of our treatment groups; control bees visited a higher proportion of T. repens flowers, and bees exposed to pesticide were more likely to choose L. corniculatus on their first visit. 5. Our results suggest that the foraging behaviour of bumblebees on real flowers can be altered by sublethal exposure to field‐realistic levels of pesticide. This has implications for the foraging success and persistence of bumblebee colonies, but perhaps more importantly for the interactions between wild plants and flower‐visiting insects and ability of bees to deliver the crucial pollination services to plants necessary for ecosystem functioning.
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spelling pubmed-49501332016-08-08 Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants Stanley, Dara A. Raine, Nigel E. Funct Ecol Plant–Animal Interactions 1. Insect pollinators are essential for both the production of a large proportion of world crops and the health of natural ecosystems. As important pollinators, bumblebees must learn to forage on flowers to feed both themselves and provision their colonies. 2. Increased use of pesticides has caused concern over sublethal effects on bees, such as impacts on reproduction or learning ability. However, little is known about how sublethal exposure to field‐realistic levels of pesticide might affect the ability of bees to visit and manipulate flowers. 3. We observed the behaviour of individual bumblebees from colonies chronically exposed to a neonicotinoid pesticide (10 ppb thiamethoxam) or control solutions foraging for the first time on an array of morphologically complex wildflowers (Lotus corniculatus and Trifolium repens) in an outdoor flight arena. 4. We found that more bees released from pesticide‐treated colonies became foragers, and that they visited more L. corniculatus flowers than controls. Interestingly, bees exposed to pesticide collected pollen more often than controls, but control bees learnt to handle flowers efficiently after fewer learning visits than bees exposed to pesticide. There were also different initial floral preferences of our treatment groups; control bees visited a higher proportion of T. repens flowers, and bees exposed to pesticide were more likely to choose L. corniculatus on their first visit. 5. Our results suggest that the foraging behaviour of bumblebees on real flowers can be altered by sublethal exposure to field‐realistic levels of pesticide. This has implications for the foraging success and persistence of bumblebee colonies, but perhaps more importantly for the interactions between wild plants and flower‐visiting insects and ability of bees to deliver the crucial pollination services to plants necessary for ecosystem functioning. John Wiley and Sons Inc. 2016-03-14 2016-07 /pmc/articles/PMC4950133/ /pubmed/27512241 http://dx.doi.org/10.1111/1365-2435.12644 Text en © 2016 The Authors. Functional Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Plant–Animal Interactions
Stanley, Dara A.
Raine, Nigel E.
Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
title Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
title_full Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
title_fullStr Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
title_full_unstemmed Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
title_short Chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
title_sort chronic exposure to a neonicotinoid pesticide alters the interactions between bumblebees and wild plants
topic Plant–Animal Interactions
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4950133/
https://www.ncbi.nlm.nih.gov/pubmed/27512241
http://dx.doi.org/10.1111/1365-2435.12644
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