Ecotoxicology

, Volume 7, Issue 5, pp 291–295 | Cite as

Toxicity of Nickel to the Earthworm and the Applicability of the Neutral Red Retention Assay

  • Janeck J. Scott-Fordsmand
  • Jason M. Weeks
  • Stephen P. Hopkin
Article

Abstract

The toxic effects of nickel on survival, growth, and reproduction of Eisenia veneta were investigated following 4 weeks of exposure to a nickel-chloride spiked loamy sand soil. The ability of a simple earthworm biomarker, the lysosomal membrane stability of coelomocytes, to reflect nickel exposure was also studied. Nickel caused a significant toxic effect on E.veneta at soil concentrations above 85 mg Ni/kg. Reproduction (cocoon production) was the most sensitive parameter being reduced at soil concentrations above 85 mg Ni/kg (EC10 = 85 mg Ni/kg). Survival of adults was only reduced at concentrations above 245 mg Ni/kg, while adult and cocoon wet weight were not affected by soil nickel concentrations up to 700 mg Ni/kg. The lysosomal membrane stability, measured as neutral-red retention time, was reduced at soil nickel concentrations similar to those that reduced reproduction, and demonstrated a dose-response relationship. The neutral-red retention time showed large individual variation for the earthworms within each exposure concentration. It was concluded that the lysosomal membrane stability, measured as neutral red retention time, has a potential role in risk assessment, but care should be taken conducting this test.

earthworm nickel soil toxicology eisenia veneta 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Janeck J. Scott-Fordsmand
    • 1
  • Jason M. Weeks
    • 2
  • Stephen P. Hopkin
    • 3
  1. 1.Dept. Terrestrial EcologyNational Environmental Research InstituteSilkeborgDenmark
  2. 2.Natural Environment Research CouncilInstitute of Terrestrial EcologyMonks Wood, Abbots Ripton, Huntingdon, CambridgeshireUK
  3. 3.Division of Zoology, School of Animal and Microbial SciencesUniversity of ReadingReadingUK

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