|
2K - Sediment Assays (TUP/156) Comparison of aquatic and sediment toxicity data of the sediment organisms Vallisneria americana, Hyalella azteca, Lumbriculus variegatus and Chironomus riparius. Fiedler, Sabine, Nagel, Roland, ABSTRACT- Data from acute toxicity tests with algae, Daphnia spec. and fish are available. But for sediment organisms there are no or only few data from long term sediment toxicity tests present. To close this gap the macrophyte V. americana and the invertebrates H. azteca, L. variegatus and C. riparius were selected as models for sediment organisms. Cadmiumchloride, 4,4-DDT, benzo[a]pyrene, pentachlorophenol, 2,4-dichlorophenol, trinitrotoluene, TBT and 3,4-dichloroaniline were selected as model compounds. In the first step of this CEFIC-LRI project, the selected organisms were exposed via water phase in acute toxicity tests. These data are necessary for comparison with acute aquatic toxicity data from other standard test organisms such as algae, Daphnia spec. and fish species. The results serve as a range finder for the sediment toxicity tests. Further, these data are necessary for discussing the effects observed in sediment toxicity tests because the different possible exposure routes (sediment, pore water and overlaying water) have to be assessed. In this poster the acute toxicity data for the selected sediment organisms and literature data from tests with algae, Daphnia spec. and fish are compared. Key words: sediment toxicity, acute toxicity |
