| a comparative study of cadmium and copper in ruffed grouse (bonasa umbellus) in regions with and without historic mining. | mining activities can increase the bioavailability of metals in aquatic and terrestrial ecosystems. following over 100 years of copper mining in portions of michigan's upper peninsula (up) terrestrial ecosystems retain vast quantities of waste rock with traces of cadmium and large concentrations of copper. we compared liver cadmium and copper concentrations in ruffed grouse (bonasa umbellus), a popular game bird from landscapes with and without historic mining. we also used chickens (gallus dome ... | 2006 | 16750853 |