Sensitivities of seven algal species to triclosan, fluoxetine and their mixtures
2018
Bi, Ran | Zeng, Xiangfeng | Mu, Lei | Hou, Liping | Liu, Wenhua | Li, Ping | Chen, Hongxing | Li, Dan | Bouchez, Agnes | Tang, Jiaxi | Xie, Lingtian | Shantou University Medical College | Chinese Academy of Sciences (CAS) | School Life Science ; Lanzhou University | South China Normal University [Guangdong, China] = Université normale de Chine du Sud [Canton, Chine] = 華南師范大學 (SCNU) | Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL) ; Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) | Liaoning Technical University ; Partenaires INRAE | National Natural Science Foundation of China 41401582 31270549 41501548; China Postdoctoral Science Foundation 2018M632471; Department of Science and Technology of Guangdong Province 2011B050300026; Guangdong Natural Science Foundation S2011030005257
International audience
Show more [+] Less [-]English. Increasing release of pharmaceuticals and personal care products (PPCPs) into aquatic ecosystems is a growing environmental concern. Triclosan and fluoxetine are two widely used PPCPs and frequently detected in aquatic ecosystems. In this study, the sensitivities of 7 algal species from 4 genera to triclosan, fluoxetine and their mixture were evaluated. The results showed that the inhibitory effect on algal growth (EC50-96h) of triclosan varied with 50 times differences among the 7 algal species. Chlorella ellipsoidea was the least susceptible species and Dunaliella parva was the most sensitive species to triclosan. The inhibitory effect of fluoxetine was less variable than triclosan. Slightly higher toxicity of fluoxetine than triclosan was shown in the 7 tested algal species. No consistent pattern of the effects from mixture of triclosan and fluoxetine was observed among the 7 algal species and among the 4 genera. Additive effects of the mixture occured in 4 species and antagonistic effects in the other 3 species but no synergistic effect was detected. The algal species might show some sign of phylogenetic response to triclosan, as evidenced by the wide range of differences in their sensitivity at the genus level. This study provides important data which could be beneficial for biomonitoring programs on the ecological risk (algal species diversity) of these two chemicals.
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