2.1.2.4 Contamination from Metals and HydrocarbonsDescriptionMetals are elements that can occur naturally in aquatic environments in lowconcentrations and have no adverse effects on human or animal health. Whenmetal concentrations are elevated relative to background levels, adverseecosystem impacts can occur. Once in the food web, these chemicals can bioaccumulatein organisms. In addition to being dependent upon the metal’sspeciation, the toxic effects of metals depend upon synergistic effects, thesensitivity of the organism, and rates of bio-magnification.
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