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Full-Text Articles in Life Sciences
The Distribution Of Minnesota Fishes And Late Pleistocene Glaciation, James C. Underhill
The Distribution Of Minnesota Fishes And Late Pleistocene Glaciation, James C. Underhill
Journal of the Minnesota Academy of Science
No abstract provided.
Mercury In Fish From Northeastern Minnesota Lakes: Historical Trends, Environmental Correlates, And Potential Sources, Edward B. Swain, Daniel D. Helwig
Mercury In Fish From Northeastern Minnesota Lakes: Historical Trends, Environmental Correlates, And Potential Sources, Edward B. Swain, Daniel D. Helwig
Journal of the Minnesota Academy of Science
ABSTRACT-High mercury concentrations in fish of some Minnesota lakes and rivers were first noted in 1971. Major anthropogenic sources of mercury to Minnesota rivers generally have been identified and controlled, but it has been difficult to identify mercury sources to remote northeastern Minnesota lakes containing fish with elevated mercury levels. Analysis of sediments from these lakes suggests that mercury deposition has increased by a factor of about 3.5 since white settlement in the state. Because the increase is spatially constant across northeastern Minnesota, atmospheric pollution appears to be responsible for the increase. Given that fish mercury varies considerably among lakes, …