“…Acclimation processes are important in the evaluation of the effects of contaminants in natural populations, because there is an important role of maternal effects, persisting throughout different generations (Chen and Stillman, 2012), and a redistribution of energy under stress (Paul et al, 2004;Guan and Wang, 2006), which can subsequently affect responses to all sorts of environmental variability. Indeed, some authors (Jansen et al, 2011;Seeland et al, 2012) have shown that past environmentally-stressful conditions produce evolution-driven carry-over effects across generations, thus complicating the prediction of the future risk of such stressors for the environment. Modifications in the tolerance limits of Daphnia after acclimation have been demonstrated for other stressors in multigenerational studies, including metals (Bossuyt et al, 2005;Guan and Wang, 2006;Chen and Stillman, 2012) and organic pesticides (Jansen et al, 2011;Seeland et al, 2012).…”