State Water Resources Research Institute Program

Project ID: 2012ME270B
Title: Do coastal Maine lakes have fish higher in mercury? A targeted survey including lakes in Acadia National Park
Project type: Research
Start date: 3/01/2012
End date: 2/28/2013
Congressional district: ME-2
Focus categories: Hydrogeochemistry, Non Point Pollution, Toxic Substances
Keywords: Geochemistry, Hydrobiology, Lakes, Pollutants, Ponds, Water Quality Monitoring, Water Chemistry
Principal Investigators: Nelson, Sarah (University of Maine); Amirbahman, Aria; Bacon, Linda; Norton, Stephen
Federal funds: $ 16,546
Non-Federal Matching Funds: $ 33,643
Abstract: Mercury (Hg) is second on the Agency for Toxic Substances and Disease Registry's (ATSDR) list of priority pollutants and is a global contaminant of major concern because exposure to the neurotoxin poses risk to human and wildlife health. Fish tissue contamination by Hg underlies the current statewide fish consumption advisory in Maine for all freshwaters. Over the past few years, the Maine Department of Environmental Protection (DEP) has been in support of our research to assess current levels of contamination in lake fish tissue and better understand Hg dynamics in watersheds and produce a model to predict fish tissue mercury concentrations specific to Maine. When finalized, these results will be shared with the Maine Center for Disease Control (CDC) for their future consideration when evaluating advisories. Our research has revealed that both historic and recent analyses of fish tissue obtained from lakes in close proximity to Maine’s coastal waters reveal particularly high Hg concentrations in both water and fish tissue. Because Acadia National Park (ANP) has been the site of numerous terrestrial and aquatic Hg studies and has the distinction of having the lake with the highest recorded Hg levels in fish in the 1990s, we decided to target lakes in ANP the park for additional data acquisition to determine whether coastal proximity is a factor. This project would support fish tissue, water and sediment chemistry data acquisition from nine to 15 lakes located within approximately 30 kilometers of the Maine Coast. At least half of these lakes would be located on Mount Desert Island because of the rich Hg datasets collected from ANP. These data will be utilized in conjunction with existing data (landscape attributes and lake chemistry and morphometry data), to determine if and how a coastal proximity component should be included when constructing models to predict Hg contamination levels in Maine fish. In addition, data obtained under this project will be shared with the Maine CDC.

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