Journal
CHEMOSPHERE
Volume 128, Issue -, Pages 148-154Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2015.01.044
Keywords
Chlorpyrifos; Damselfly larvae; Heat wave; Latitude; Thermal adaptation
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Funding
- French Ministry of Ecology, Sustainable Development and Energy, FWO [G.0610.11]
- Belspo project Speedy
- KU Leuven Centre of Excellence program [PF/2010/07]
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Heat waves are generally associated with an increased energy consumption and could thus increase the vulnerability to subsequent pesticide exposure. We investigated the combined effect of a heat wave and subsequent exposure to the pesticide chlorpyrifos in Ischnura elegans damselfly larvae. To assess local thermal adaptation to heat waves, we applied these combined stressors on replicated low- and high-latitude populations in Europe. Unexpectedly, we observed positive sublethal effects of the heat wave: fat content and phenoloxidase activity increased. Chlorpyrifos had strong negative effects on survival, growth rate, and fat content, while phenoloxidase activity increased; these effects between latitudes were found similar. We found little indication of a higher ability to withstand a heat wave in southern larvae. We did detect a synergistic negative effect on AChE activity. This result highlights the importance of considering delayed effects of extreme temperature events when assessing the impact of pesticides under climate change. (C) 2015 Elsevier Ltd. All rights reserved.
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