Exceeds the latter's ability to metabolize or excrete the substance
Chemical accumulates within the tissues of the organism.
Concentration of a contaminant may be virtually undetectable in water
Magnified thousands of time as the contaminant passes up the food chain
Phytoplankton Zooplankton Rainbow smelt Lake trout Herring Gull Fish Fry Polychlorinated biphenyls (PCBs) undetectable in water Biomagnification In food chain X 1 X 49.2 X 416 X 1932 X 49,600 ?????