Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 410429
Title Effects of an anionic surfactant (FFD-6) on the energy and information flow between a primary producer (Scenedesmus obliquus) and a consumer (Daphnia magna)
Author(s) Lürling, M.F.L.L.W.; Lange, H.J. de; Peeters, E.T.H.M.
Source Ecotoxicology 20 (2011)8. - ISSN 0963-9292 - p. 1881 - 1889.
Department(s) Aquatic Ecology and Water Quality Management
CE - Molecular Ecology Ecotoxicology and Wildlife Management
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) absolute-configuration determination - unicell-colony transformation - alkylbenzene sulfonate las - aliphatic sulfates - morphological defense - phenotypic plasticity - aquatic toxicity - feeding-behavior - risk-assessment - phytoplankton
Abstract The effects of a commercially available anionic surfactant solution (FFD-6) on growth and morphology of a common green alga (Scenedesmus obliquus) and on survival and clearance rates of the water flea Daphnia magna were studied. The surfactant-solution elicited a morphological response (formation of colonies) in Scenedesmus at concentrations of 10-100 µl l(-1) that were far below the No Observed Effect Concentration (NOEC) value of 1,000 µl l(-1) for growth inhibition. The NOEC-value of FFD-6 for colony-induction was 3 µl l(-1). Daphnia survival was strongly affected by FFD-6, yielding LC(50-24h) and LC(50-48h) of 148 and 26 µl l(-1), respectively. In addition, clearance rates of Daphnia feeding on unicellular Scenedesmus were inhibited by FFD-6, yielding a 50% inhibition (EC(50-1.5h)) at 5.2 µl l(-1) with a NOEC of 0.5 µl l(-1). When Daphnia were offered FFD-6-induced food in which eight-celled colonies (43 × 29 µm) were most abundant, clearance rates (~0.14 ml ind.(-1) h(-1)) were only 25% the rates of animals that were offered non-induced unicellular (15 × 5 µm) Scenedesmus (~0.56 ml ind.(-1) h(-1)). As FFD-6 concentrations in the treated food used in the experiments were far below the NOEC for clearance rate inhibition, it is concluded that the feeding rate depression was caused by the altered morphology of the Scenedesmus moving them out of the feeding window of the daphnids. The surfactant evoked a response in Scenedesmus that is similar to the natural chemically induced defensive reaction against grazers and could disrupt the natural information conveyance between these plankton organisms
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