, Volume 17, Issue 6, pp 539–548

Community and ecosystem responses to a pulsed pesticide disturbance in freshwater ecosystems

  • Amy L. Downing
  • Kristen M. DeVanna
  • C. Nichole Rubeck-Schurtz
  • Laura Tuhela
  • Heather Grunkemeyer

DOI: 10.1007/s10646-008-0211-3

Cite this article as:
Downing, A.L., DeVanna, K.M., Rubeck-Schurtz, C.N. et al. Ecotoxicology (2008) 17: 539. doi:10.1007/s10646-008-0211-3


Pesticides have been shown to be detrimental to key groups of freshwater organisms including cladocerans, odonates, and amphibians. However, less is known about the response of freshwater communities and ecosystems to pesticide disturbances as they occur in nature. Using outdoor aquatic mesocosms, we assembled identical and diverse replicate freshwater plankton food webs obtained from an adjacent pond. We established three pesticide treatments consisting of pulses of a common pesticide Sevin® with the active ingredient carbaryl, at concentrations of 0.1, 1 and 20 μg carbaryl/ml, and a pesticide-free control treatment. We monitored the response of microbial, phytoplankton, and zooplankton communities in addition to oxygen concentrations. Carbaryl concentrations peaked shortly after Sevin application and degraded quickly and treatment differences were undetectable after 30 days. Zooplankton richness, diversity, abundance, and oxygen concentrations all decreased in pulsed treatments, while phytoplankton and microbial abundance increased. Zooplankton composition in the high pesticide treatment consisted primarily of rotifers as compared to dominance by copepods in the other three treatments. While many of the community and ecosystem properties showed signs of recovery within 40 days after the pulsed pesticide disturbance, important and significant differences remained in the microbial, phytoplankton and zooplankton communities after the pesticide degraded.


Carbaryl Mesocosm Zooplankton Phytoplankton Freshwater ecosystem 

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Amy L. Downing
    • 1
  • Kristen M. DeVanna
    • 2
  • C. Nichole Rubeck-Schurtz
    • 3
  • Laura Tuhela
    • 4
  • Heather Grunkemeyer
    • 5
  1. 1.Department of ZoologyOhio Wesleyan UniversityDelawareUSA
  2. 2.Department of Environmental SciencesUniversity of ToledoToledoUSA
  3. 3.Department of Fisheries and WildlifeMichigan State UniversityEast LansingUSA
  4. 4.Department of Botany-MicrobiologyOhio Wesleyan UniversityDelawareUSA
  5. 5.Department of ChemistryOhio Wesleyan UniversityDelawareUSA

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