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Direct and indirect effects of the fungicide azoxystrobin in outdoor brackish water microcosms

Gustafsson, Kerstin and Blidberg, Eva and Karlsson Elfgren, Irene and Hellström, Anna and Kylin, Henrik and Gorokhova, Elena (2010). Direct and indirect effects of the fungicide azoxystrobin in outdoor brackish water microcosms. Ecotoxicology. 19:2, 431-444
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Official URL: http://dx.doi.org/10.1007/s10646-009-0428-9

Abstract

The effects of the strobilurin fungicide azoxystrobin were studied in brackish water microcosms, with natural plankton communities and sediment. Two experiments were conducted: Experiment 1 (nominal conc. 0, 15 and 60 mu g/L, 24-L outdoor microcosms for 21 days) and a second, follow-up, Experiment 2 (nominal conc. 0, 3, 7.5, 15 mu g/L, 4-L indoor microcosms for 12 days). The microcosms represent a simplified brackish water community found in shallow semi-enclosed coastal areas in agricultural districts in the Baltic Sea region. Measured water concentrations of the fungicide (Experiment 1) were, on average, 83 and 62% of nominal concentrations directly after application, and 25 and 30% after 21 days, for the low and high dose treatments, respectively, corresponding to mean DT50-values of 15.1 and 25.8 days, for low and high dose treatments, respectively. In Experiment 1, direct toxic effects on calanoid copepods at both test concentrations were observed. Similarly, in Experiment 2, the copepod abundance was significantly reduced at all tested concentrations. There were also significant secondary effects on zooplankton and phytoplankton community structure, standing stocks and primary production. Very few ecotoxicological studies have investigated effects of plant protection products on Baltic organisms in general and effects on community structure and function specifically. Our results show that azoxystrobin is toxic to brackish water copepods at considerably lower concentrations than previously reported from single species tests on freshwater crustaceans, and that direct toxic effects on this ecologically important group may lead to cascade effects altering lower food webs and ecosystem functioning.

Authors/Creators:Gustafsson, Kerstin and Blidberg, Eva and Karlsson Elfgren, Irene and Hellström, Anna and Kylin, Henrik and Gorokhova, Elena
Title:Direct and indirect effects of the fungicide azoxystrobin in outdoor brackish water microcosms
Series/Journal:Ecotoxicology (0963-9292)
Year of publishing :2010
Volume:19
Number:2
Page range:431-444
Number of Pages:14
Publisher:Springer
ISSN:0963-9292
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
M Aquatic sciences and fisheries > M01 Fisheries and aquaculture - General aspects
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 207 Environmental Engineering > Environmental Management
Agrovoc terms:Baltic Sea, ecosystem approaches, toxicity, copepoda
Keywords:Baltic Sea, Strobilurin fungicides, Copepoda, indirect effects, model ecosystems, toxicity
URN:NBN:urn:nbn:se:slu:epsilon-e-2574
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2574
Additional ID:
Type of IDID
Web of Science (WoS)000273979000019
DOI10.1007/s10646-009-0428-9
ID Code:12065
Faculty:NL - Faculty of Natural Resources and Agricultural Sciences (until 2013)
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:06 Aug 2015 13:03
Metadata Last Modified:06 Aug 2015 13:03

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