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research
Effects of chlorpyrifos on macroinvertebrate communities in coastal stream mesocosms
Authors
A Colville
G Hose
+4 more
P Jones
F Krassoi
R Lim
F Pablo
Publication date
1 January 2008
Publisher
'Springer Science and Business Media LLC'
Doi
Cite
Abstract
This study measured the effects of a single pulse of chlorpyrifos at nominal concentrations of 1 and 10 μg/l on the macroinvertebrate community structure of a coastal stream mesocosm system. Analysis of data using Principal Response Curves (PRC) and Monte Carlo tests showed significant changes in the treated stream mesocosms relative to that of the controls. These changes in the macroinvertebrate assemblages occurred within 6 h, and persisted for at least 124 days after dosing. Significant community-level effects were detected at the lowest concentration on days 2 and 16 post-dosing, giving a no-observed effect concentration (NOECcommunity) of 1.2 μg/l (measured). The mayflies Atalophlebia sp. and Koorrnonga sp., Chironomidae and Acarina were all sensitive to chlorpyrifos and decreased in abundance in treated mesocosms after dosing. The fauna of these coastal stream mesocosms showed similar sensitivity to chlorpyrifos with that of other reported studies, but there was no evidence of recovery after 124 days. © 2007 Springer Science+Business Media, LLC
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Macquarie University ResearchOnline
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OPUS - University of Technology Sydney
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oai:opus.lib.uts.edu.au:10453/...
Last time updated on 14/09/2015