Effects of chlorpyrifos on macroinvertebrate communities in coastal stream mesocosms

Anne Colville, Peter Jones, Fleur Pablo, Frederick Krassoi, Grant Hose, Richard Lim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalEcotoxicology
Volume17
Issue number3
DOIs
Publication statusPublished - Apr 2008
Externally publishedYes

Keywords

  • Artificial streams
  • Chlorpyrifos
  • Macroinvertebrates
  • Mesocosm
  • Organophosphate pesticide
  • Toxicity

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