Ecotoxicology

, Volume 17, Issue 8, pp 756–771

Impact of single and repeated applications of the insecticide chlorpyrifos on tropical freshwater plankton communities

  • Michiel A. Daam
  • Paul J. Van den Brink
  • António J. A. Nogueira
Article

DOI: 10.1007/s10646-008-0227-8

Cite this article as:
Daam, M.A., Van den Brink, P.J. & Nogueira, A.J.A. Ecotoxicology (2008) 17: 756. doi:10.1007/s10646-008-0227-8

Abstract

This paper describes the effects of a single and a repeated application of the organophosphorus insecticide chlorpyrifos on zooplankton and phytoplankton communities in outdoor microcosms in Thailand. Treatment levels of 1 μg L−1 were applied once or twice with a 2-week interval. Both treatments led to a significant decrease in cladocerans followed by an increase in rotifers, although the extent by which species were affected was different. Ceriodaphnia cornuta was the most responding cladoceran after the first treatment, while Moina micrura responded most to the second. This is explained by differences in the growth phase of M. micrura at the time of application and an increase in Microcystis abundance over the course of the experiment. Several phytoplankton taxa either increased or decreased as a result of the chlorpyrifos-induced changes in zooplankton communities. Even though chlorpyrifos disappeared fast from the water column, effects on plankton communities persisted till the end of the experiment (42 days) when the insecticide concentrations had dropped below the detection limit. This was presumably due to the increasing population trend of Microcystis, favouring rotifers over cladocerans.

Keywords

Chlorpyrifos Single application Repeated application Tropical Plankton community 

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Michiel A. Daam
    • 1
    • 2
  • Paul J. Van den Brink
    • 3
    • 4
  • António J. A. Nogueira
    • 1
  1. 1.CESAM & Department of BiologyUniversity of AveiroAveiroPortugal
  2. 2.Monte de CaparicaPortugal
  3. 3.Alterra, Wageningen University and Research CentreWageningenThe Netherlands
  4. 4.Department of Aquatic Ecology and Water Quality ManagementWageningen University and Research centre, Wageningen UniversityWageningenThe Netherlands

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