On studying the hazards of pollution of the biosphere: effects of sodium dodecylsulfate (SDS) on planktonic filter-feeders.

Vorozhun I. M., S. A. Ostroumov. On studying the hazards of pollution of the biosphere: effects of sodium dodecylsulfate (SDS) on planktonic filter-feeders. - Doklady Biological Sciences, 2009, Vol. 425, pp. 133–134. Tables. Bibliogr. 15 refs. ISSN 0012-4966. DOI: 10.1134/S0012496609020136; http://www.springerlink.com/content/p7754h672w814m30/;
** Full text online free: http://www.scribd.com/doc/45914806;
** http://www.citeulike.org/user/ATP/article/6113581;
[the original Russian text: I.M. Vorozhun, S.A. Ostroumov, 2009, published in Doklady Akademii Nauk, 2009, Vol. 425, No. 2, pp. 271–272].
** The goal of this study was to test whether the surfactant SDS has an inhibitory effect on the ability of the planktonic filter-feeder Daphnia magna to remove phytoplankton from water during their filtration activity. Daphnia were kept under laboratory conditions in vessels and fed with phytoplankton: the green algae Scenedesmus quadricauda (Turp.) Breb. After filtration for 6–24 h in the presence of SDS at concentrations 5 and 10 mg/l, the abundance of S. quadricauda cells in water was higher than in the control. At the lower SDS concentrations (0.1, 0.5, and 1 mg/l), differences in the abundance of algal cells relative to the control were observed after 3 h of incubation and disappeared after 6–24 h of incubation. The calculation of the mean rate of algae removal by daphnia showed that this parameter decreased within the first 3 h after the beginning of incubation in the presence of SDS. ** CONCLUSION. It is the first time that it was demonstrated that the synthetic surfactant SDS decreased the rate of water filtration by the planktonic crustaceans D. magna.