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… marine ecosystem functioning and set the upper limits for fishery yields (Ryther and Yentsch, 1957; Behrenfeld et al., … lead to increased exposure of high trophic level Arctic freshwater biota to contaminants. Their reasoning is that … al., 2009). For instance, the lethality of dieldrin to the freshwater darter (Etheostoma nigrum) and the toxicity of …