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Structural and func...
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Bundschuh, MircoSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
(författare)
Structural and functional effects of a short-term pyrethroid pulse exposure on invertebrates in outdoor stream mesocosms
- Artikel/kapitelEngelska2018
Förlag, utgivningsår, omfång ...
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Elsevier BV,2018
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Elsevier,2024
Nummerbeteckningar
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LIBRIS-ID:oai:slubar.slu.se:86680
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https://res.slu.se/id/publ/86680URI
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https://doi.org/10.1016/j.scitotenv.2017.08.048DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Agricultural land-use frequently results in short pulse exposures of insecticides such as pyrethroids in river systems, adversely affecting local invertebrate communities. In order to assess insecticide-induced effects, stream mesocosms are used within higher tier aquatic risk assessment. Regulatory acceptable concentrations (RACs) derived from those studies are often higher compared with tier 1 RACs. Hence, the present mesocosm study evaluates this aspect using a pulse exposure scenario typical for streams and the pyrethroid insecticide etofenprox. A 6-h pulse exposure with measured concentrations of 0.04, 0.3 and 5.3 mu g L-1 etofenprox was used. We considered abundance, drift and emergence of invertebrates as structural endpoints and the in situ-measured feeding rates of the isopod Asellus aquaticus as functional endpoint. Most prominent effects were visible at 5.3 mu g L-1 etofenprox which caused adverse effects of up to 100% at the individual and population level, as well as community structure alterations. Transient effects were observed for invertebrate drift (effect duration <= 24 h) and for the invertebrate community (9 days after exposure) at 0.3 mu g L-1 etofenprox. Furthermore, 0.04 mu g L-1 etofenprox affected the abundance of the mayfly Cloeon simile (decrease by 66%) and the feeding rate of A. aquaticus (decrease by 44%). Thus, implications for the functional endpoint leaf litter breakdown in heterotrophic ecosystems may be expected. A hypothetical RAC derived from the present mesocosm study (0.004 mu g L-1) is in line with the official tier 1 RAC (0.0044 mu g L-1) and thus shows that the present mesocosm study did not result in a higher RAC. (C) 2017 Elsevier B.V. All rights reserved.
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Sveriges lantbruksuniversitetInstitutionen för vatten och miljö
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Sveriges lantbruksuniversitet
Sammanhörande titlar
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Ingår i:Science of the Total Environment: Elsevier BV610-611, s. 810-8190048-96971879-1026
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