Title:
Definition von Referenzbedingungen, Kontrollsedimenten und Toxizitätsschwellenwerten für limnische Sedimentkontakttests – SeKT.
Authors:
Ute Feiler, Wolfgang Ahlf, Christiane Fahnenstich, Daniel Gilberg, Monika Hammers-Wirtz, Sebastian Hoess, Henner Hollert, Kerstin Melbye, Michael Meller, Helga Neumann-Hensel, Toni Ratte, Thomas-Benjamin Seiler, Denise Spira, Jürgen Weber & Peter Heininger
Year:
2009
Bibl. details:
Final report for the German Federal Ministery of Education and Research, prepared by the German Federal Institute of Hydrology (BfG, Koblenz), BFG-1614
Keywords:
Sediment, ecotoxicological sediment assessment, sediment contact test, test battery, toxicity threshold, reference conditions, control sediment, artificial sediment, Oligochaeta, Lumbriculus variegatus, Arthrobacter globiformis, Saccharomyces cerevisiae, Caenorhabditis elegans, Myriophyllum aquaticum, Danio rerio
Abstract
The aim of the investigations by the joint research project SeKT (sediment contact tests) was to review the practical applicability of sediment contact tests for an extensive range of various sediments. Test organisms from different trophic levels covering all micro habitats in freshwater sediments were tested using standardised test procedures: bacteria (Arthrobacter globiformis), fungi (Saccharomyces cerevisiae), nematodes (Caenorhabditis elegans), oligochaetes, (Lumbriculus variegatus; toxicity and bioaccumulation), fish (Danio rerio), and macrophytes (Myriophyllum aquaticum). These organisms cover a wide range of exposure and uptake pathways.
A key issue of the joint research project was the investigation of the variability of the respective test systems in low contaminated native sediments. A wide range of sediments were tested with several sediment contact tests in order to determine representatively influence of natural sediment properties on the test systems. Another aim of the project was the definition of reference conditions and standardised control conditions (negative control) as a basis for the derivation of toxicity thresholds and the comparability of the sediment contact tests within the used test battery. Finally the suitability of the used test systems should be checked in different spiked control sediments and in anthropogenic contaminated field sediments.
The results of this project should provide a sound data basis to improve the interpretation and assessment of ecotoxicological sediment examinations.
