| mercury trends in colonial waterbird eggs downstream of the oil sands region of alberta, canada. | mercury levels were measured in colonial waterbird eggs collected from two sites in northern alberta and one site in southern alberta, canada. northern sites in the peace-athabasca delta and lake athabasca were located in receiving waters of the athabasca river which drains the oil sands industrial region north of fort mcmurray, alberta. temporal trends in egg mercury (hg) levels were assessed as were egg stable nitrogen isotope values as an indicator of dietary change. in northern alberta, cali ... | 2013 | 24070029 |