Bundschuh, Mirco
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
Abstract
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
Keywords
Functional endpoint; Aquatic guidance document; Community; Drift; Emergence
Published in
Science of the Total Environment
2018, volume: 610-611, pages: 810-819
SLU Authors
Associated SLU-program
SLU Plant Protection Network
Global goals (SDG)
SDG6 Clean water and sanitation
UKÄ Subject classification
Other Natural Sciences
Publication identifier
- DOI: https://doi.org/10.1016/j.scitotenv.2017.08.048
Permanent link to this page (URI)
https://res.slu.se/id/publ/86680