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Tytuł pozycji:

Higher mean and fluctuating temperatures jointly determine the impact of the pesticide chlorpyrifos on the growth rate and leaf consumption of a freshwater isopod.

Tytuł:
Higher mean and fluctuating temperatures jointly determine the impact of the pesticide chlorpyrifos on the growth rate and leaf consumption of a freshwater isopod.
Autorzy:
Theys C; Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium. Electronic address: .
Verheyen J; Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium.
Tüzün N; Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium.
Stoks R; Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium.
Źródło:
Chemosphere [Chemosphere] 2021 Jun; Vol. 273, pp. 128528. Date of Electronic Publication: 2020 Oct 08.
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
MeSH Terms:
Chlorpyrifos*/toxicity
Isopoda*
Odonata*
Pesticides*/toxicity
Animals ; Ecosystem ; Fresh Water ; Larva ; Plant Leaves ; Temperature
Contributed Indexing:
Keywords: Climate-induced toxicant sensitivity (CITS) concept; Ecosystem process; Multiple stressors; Organophosphate pesticide; Temperature variability
Substance Nomenclature:
0 (Pesticides)
JCS58I644W (Chlorpyrifos)
Entry Date(s):
Date Created: 20201023 Date Completed: 20210427 Latest Revision: 20210427
Update Code:
20240105
DOI:
10.1016/j.chemosphere.2020.128528
PMID:
33092821
Czasopismo naukowe
There is growing evidence that both increases in mean temperature and the widespread daily temperature fluctuations (DTF) may increase pesticide toxicity. Nevertheless, the likely more stressful, realistic combination of the two warming-related stressors has rarely been considered in ecotoxicology. Moreover, we have little knowledge on whether these stressor combinations could impair ecosystem functioning. We examined the effect of the pesticide chlorpyrifos under an increased mean temperature (+4 °C, from 18 °C to 22 °C) and in the presence of DTF (constant and 8 °C) on two life-history traits (mortality and growth rate) and one ecologically important behavioural trait (feeding rate) in the freshwater isopod Asellus aquaticus. The chlorpyrifos concentration used, 0.2 μg/L, did not cause mortality in any thermal condition, nor did it cause sublethal effects at the mean temperature of 18 °C. A key finding was that growth rate was strongly reduced by the pesticide only under the combination of both a higher mean temperature and DTF, highlighting the importance of testing toxicity under this realistic thermal scenario. The leaf consumption of chlorpyrifos-exposed isopods increased at the higher mean temperature when this was kept constant, however, it lowered again towards control levels when DTF was induced, thereby contributing to the growth reduction at this most stressful condition. These alterations of growth and leaf degradation rates may impact nutrient recycling, a key ecosystem function. Our results highlight the importance of integrating both increases in mean temperature and in DTF to improve current and future ecological risk assessment of pesticides.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)

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