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The sediment-contact test using the ostracod Heterocypris incongruens: Effect of fine sediments and determination of toxicity thresholds.
Journal article

The sediment-contact test using the ostracod Heterocypris incongruens: Effect of fine sediments and determination of toxicity thresholds.

  • Casado-Martinez MC Swiss Centre for Applied Ecotoxicology Eawag-EPFL, Station 2 (GR B0 391), 1015 Lausanne, Switzerland. Electronic address: carmen.casado@centreecotox.ch.
  • Burga-Pérez KF Université de Lorraine (UdL), Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC) - UMR 7360 CNRS, Campus Bridoux, Bât. IBiSE, 8, rue du Général Delestraint, 57070 Metz, France.
  • Bebon R Swiss Centre for Applied Ecotoxicology Eawag-EPFL, Station 2 (GR B0 391), 1015 Lausanne, Switzerland.
  • Férard JF Université de Lorraine (UdL), Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC) - UMR 7360 CNRS, Campus Bridoux, Bât. IBiSE, 8, rue du Général Delestraint, 57070 Metz, France.
  • Vermeirssen EL Swiss Centre for Applied Ecotoxicology Eawag/EPFL, Überlandstrasse 133, 8600 Dübendorf, Switzerland.
  • Werner I Swiss Centre for Applied Ecotoxicology Eawag/EPFL, Überlandstrasse 133, 8600 Dübendorf, Switzerland.
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  • 2016-03-05
Published in:
  • Chemosphere. - 2016
Clay content
Grain size
Ostracodtoxkit(®)
Sediment toxicity
Toxicity threshold
Animals
Biological Assay
Crustacea
Ecotoxicology
Geologic Sediments
Toxicity Tests
English The toxicity test using freshwater ostracods of the species Heterocypris incongruens is a sub-chronic static test that exposes individuals to whole sediments over a period of 6 d, the endpoints being mortality and growth. We tested the hypothesis that endpoints of the sediment bioassay using Heterocypris incongruens are affected by the presence of fine sediment particles by testing control sediment supplied with the commercial test kit with increasing proportions of kaolin clay as a proxy for fines. While mortality was not affected, the results showed that increasing the presence of clay reduced ostracod growth. Based on the variability in growth, a sublethal toxicity threshold of 35% is proposed to distinguish effects due to sediment properties from those due to toxicity. The relevance of this threshold was verified using data from toxicity tests of ambient sediment samples with low levels of contamination.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/96977
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