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Mercury in the Environment$
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Michael Bank

Print publication date: 2012

Print ISBN-13: 9780520271630

Published to California Scholarship Online: September 2012

DOI: 10.1525/california/9780520271630.001.0001

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Mercury Hotspots in Freshwater Ecosystems: Drivers, Processes, and Patterns

Chapter:
(p.143) Chapter 9 Mercury Hotspots in Freshwater Ecosystems: Drivers, Processes, and Patterns
Source:
Mercury in the Environment
Author(s):

Celia Y. Chen

Charles T. Driscoll

Neil C. Kamman

Publisher:
University of California Press
DOI:10.1525/california/9780520271630.003.0009

Studies conducted in a wide range of freshwater ecosystems have revealed specific suites of attributes that predispose certain ecosystems to being sites of elevated MeHg bioaccumulation in fish and piscivorous birds and mammals. These hotspots result from a complex sequence of biotic and abiotic mechanisms that occur at critical points in the transfer of Hg in the environment from Hg supply, methylation, transport, bioaccumulation, and transfer in food webs. System-specific case studies are described in which Hg concentrations in biotic endpoints are known to be elevated. These studies highlight mercury sensitivity factors in natural lakes and ponds occupying sensitive landscapes, small and large managed reservoirs, the Florida Everglades, the Great Lakes, and in industrially impacted rivers.

Keywords:   methylmercury, hotspots, reservoirs, methylation, bioaccumulation, aquatic ecosystems, Everglades, Great Lakes, Adirondacks

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