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Terrestrial avoidance behaviour tests as screening tool to assess soil contamination.

Susana Loureiro1, Amadeu M V M Soares, António J A Nogueira

  • 1Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal. sloureiro@bio.ua.pt

Environmental Pollution (Barking, Essex : 1987)
|May 12, 2005
PubMed
Summary

Soil bioassays using earthworms and isopods reveal that avoidance behavior tests are effective screening tools for assessing contaminant toxicity. These tests quickly identify toxic compounds in soil, aiding in environmental risk assessment.

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Area of Science:

  • Environmental Toxicology
  • Ecotoxicology
  • Soil Science

Background:

  • Bioassays are crucial for evaluating soil quality and the bioavailable fraction of contaminants.
  • Assessing potential toxicity requires sensitive and rapid screening tools.

Purpose of the Study:

  • To evaluate the efficacy of a rapid, sublethal avoidance behavior test as a screening tool for soil contaminants.
  • To compare the sensitivity of avoidance behavior tests with other sublethal parameters.

Main Methods:

  • Earthworms (Eisenia andrei) and isopods (Porcellionides pruinosus) were exposed to various chemicals and contaminated mine soils for 48 hours.
  • Avoidance behavior was monitored, and EC50 values were statistically derived for all bioassays.
  • Comparison with other sublethal parameters like reproduction and growth was performed.

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Main Results:

  • Both earthworms and isopods demonstrated avoidance of contaminated soils and chemical exposures.
  • The avoidance behavior test proved to be as sensitive, or more sensitive, than traditional sublethal parameters.
  • EC50 values were successfully derived, indicating quantifiable toxicity thresholds.

Conclusions:

  • Avoidance behavior tests are highly effective and sensitive screening tools for ecotoxicological risk assessment (ERA).
  • These tests provide rapid insights into the bioavailability and toxicity of soil contaminants.
  • The method offers advantages for quick assessment of soil quality and contaminant impact.