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THE USE OF LOCAL MERCURY DEPOSITION MEASUREMENTS IN MODELING THE FATE, TRANSPORT AND BIOACCUMULATION OF METHYLMERCURY ON THE CHEYENNE RIVER SIOUX TRIBAL LANDS
Citation:
JOHNSTON, J. M., D. HOFF, R. EDGAR, C. DUCHENEAUX, C. D. KNIGHTES, AND R. B. AMBROSE. THE USE OF LOCAL MERCURY DEPOSITION MEASUREMENTS IN MODELING THE FATE, TRANSPORT AND BIOACCUMULATION OF METHYLMERCURY ON THE CHEYENNE RIVER SIOUX TRIBAL LANDS. Presented at NADP 2005: Science Supporting Resource Management, Jackson, WY, September 27 - 30, 2005.
Impact/Purpose:
The objective of this task is to develop, support and transfer a wide variety of tools and mathematical models that can be used to support watershed and water quality protection programs in support of OW, OSWER, and the Regions.
Description:
Managed farm ponds on Sioux Tribal lands were monitored as a part of a two year study to address the variation in methylmercury bioaccumulation in fishes from 2003-2004. Initial tissue residue monitoring suggested that larger ponds posed less risk for human exposure to methylmercury than smaller ponds; however, variation in hydrology, chemistry, food web dynamics and patterns of local deposition among ponds was uncharacterized.