Environmental Pollution, March, 2014, Vol.186, p.136(5)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.envpol.2013.11.028 Byline: Gabriela KalAikova, Dominic Englert, Ricki R. Rosenfeldt, Frank Seitz, Ralf Schulz, Mirco Bundschuh Abstract: Although nanoparticle production and application increases continuously, their implications in species interactions, especially in combination with other environmental stressors, are rarely assessed. Therefore, the present study investigated the influence of 2 mg/L titanium dioxide nanoparticles (nTiO.sub.2; 〈100 nm) on the interaction between the prey Ephemerella ignita (Ephemeroptera) and the predator Gammarus fossarum (Amphipoda) over 96 h considering UV-irradiation at field relevant levels (approximately 11.4 W/m.sup.2) as an additional environmental factor (n = 16). At the same time, gammarid's consumption of an alternative food source, i.e. leaf discs, was assessed. All endpoints covered were not affected by nTiO.sub.2 alone, while the combination of nTiO.sub.2 and UV caused a reduction in gammarid's predation (68%), leaf consumption (60%) and body weight (22%). These effects were most likely triggered by the UV-induced formation of reactive oxygen species by nTiO.sub.2. The present study, hence, highlights the importance to cover UV-irradiation during the risk assessment of nanoparticles. Author Affiliation: (a) Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, D-76829 Landau, Germany (b) Faculty of Chemistry and Chemical Technology, University of Ljubljana, AA kerAeva 5, SI-1000 Ljubljana, Slovenia (c) Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjelms vag 9, 750 07 Uppsala, Sweden Article History: Received 24 September 2013; Revised 6 November 2013; Accepted 18 November 2013
Nanoparticles ; Titanium Dioxide
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