| Title: | "Interactive effects of xenobiotic, abiotic and biotic stressors on Daphnia pulex--results from a multiple stressor experiment with a fractional multifactorial design" |
| Author(s): | Scherer C; Seeland A; Oehlmann J; Muller R; |
| Address: | "Goethe University Frankfurt am Main, Department Aquatic Ecotoxicology, Max-von-Laue-Strasse 13, D-60438 Frankfurt, Germany. c.scherer85@gmx.net" |
| DOI: | 10.1016/j.aquatox.2013.04.014 |
| ISSN/ISBN: | 1879-1514 (Electronic) 0166-445X (Linking) |
| Abstract: | "Pollutant effects on aquatic key species are confounded by multiple abiotic and biotic stressors. To better discriminate and understand the intrinsic and environmental correlates of changing aquatic ecosystems, we untangle in present study how the effects of a low-dosed fungicide on daphnids (via different exposure routes) becomes modified by increasing temperature and the presence of a predator. Using a fractional multifactorial test design, the individual growth, reproduction and population growth rate of Daphnia pulex were investigated under exposure to the fungicide pyrimethanil at an environmental relevant concentration--either directly (via the water phase), indirectly (via food), dually (via water and food) or for multiple generations (fungicide treated source population)--at three temperatures and in presence/absence of the predator kairomones of Chaoborus flavicans. Our results clearly illustrate that multiple stress factors can modify the response of an aquatic key species to pollutants. The environmentally relevant exposure of the contaminant via food or the medium is of same importance. Nevertheless, temperature and the presence of a predator are the dominant factors controlling the reproduction of D. pulex. We conclude that sublethal pyrimethanil pollution can disturb the zooplankton community at suboptimal temperature conditions, but the effects will become masked by low temperatures or if chaoborid larvae are present" |
| Keywords: | "Analysis of Variance Animals Chromatography, High Pressure Liquid Daphnia/*drug effects/growth & development Diptera/physiology Fungicides, Industrial/*toxicity Germany Larva/physiology Population Dynamics Predatory Behavior/physiology Pyrimidines Reprodu;" |
| Notes: | "MedlineScherer, Christian Seeland, Anne Oehlmann, Jorg Muller, Ruth eng Research Support, Non-U.S. Gov't Netherlands 2013/06/04 Aquat Toxicol. 2013 Aug 15; 138-139:105-15. doi: 10.1016/j.aquatox.2013.04.014. Epub 2013 May 13" |
