Mercury contribution to an adirondack lake |
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Authors: | R J Scrudato D Long Robert Weinbloom |
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Institution: | (1) Research Center SUNY at Oswego, 13126 New York, Oswego;(2) Freshwaters Institute, Rensselaer Polytechnic Institute, New York, 12182 Troy;(3) New York State Department of Health, New York, 12201 Albany |
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Abstract: | Elevated copper, lead, and zinc concentrations in the upper 10 to 20 cm of sediment sampled from Cranberry Lake, a large Adirondack
lake, are attributed to atmospheric contributions. Pb-210 and pollen core data, however, suggest Cranberry Lake also received
mercury discharges during the turn of the century when the area was the center of extensive lumbering and related activities.
Elevated mercury concentrations in Cranberry Lake smallmouth bass derived from remobilization from mercury-contaminated bottom
sediments which increased the bioavailability to Cranberry Lake organisms. Mercury remobilization and accumulation by fish
are promoted by fluctuating pH values resulting from acid precipilation. |
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