Download or read book Assessment of Mercury Contamination in Selected Minnesota Lakes and Streams written by Edward B. Swain and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Mercury Contamination in Fish from Selected Lakes in Northern Louisiana written by Zhong Joseph Guo and published by . This book was released on 1996 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Mercury Contamination in Selected Michigan Lakes 1987 90 written by Elwin Evans and published by . This book was released on 1991 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury in the St Louis River Mississippi River Crane Lake and Sand Point Lake written by and published by . This book was released on 1992 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings A WMA Annual Meeting written by Air & Waste Management Association. Meeting and published by . This book was released on 1991 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Assessment of Human Health Risk Associated with Mercury Contamination of Fish in Northern Minnesota written by and published by . This book was released on 1977 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strategies for Reducing Mercury in Minnesota written by Edward B. Swain and published by . This book was released on 1994 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guidance for assessing chemical contaminant data for use in fish advisories volume IVrisk communication written by and published by DIANE Publishing. This book was released on 1994 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guidance for Assessing Chemical Contaminant Data for Use in Fish Advisories written by Barbara Ann Knuth and published by . This book was released on 1995 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Park Science written by and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Minnesota Water Quality written by Minnesota Pollution Control Agency and published by . This book was released on 1980 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Minnesota Lake Water Quality Assessment Report written by Steven A. Heiskary and published by . This book was released on 2005 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury in the Nation s Streams written by Dennis A. Wentz and published by . This book was released on 2014 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Mercury is a potent neurotoxin that accumulates in fish to levels of concern for human health and the health of fish-eating wildlife. Mercury contamination of fish is the primary reason for issuing fish consumption advisories, which exist in every State in the Nation. Much of the mercury originates from combustion of coal and can travel long distances in the atmosphere before being deposited. This can result in mercury-contaminated fish in areas with no obvious source of mercury pollution. Three key factors determine the level of mercury contamination in fish--the amount of inorganic mercury available to an ecosystem, the conversion of inorganic mercury to methylmercury, and the bioaccumulation of methylmercury through the food web. Inorganic mercury originates from both natural sources (such as volcanoes, geologic deposits of mercury, geothermal springs, and volatilization from the ocean) and anthropogenic sources (such as coal combustion, mining, and use of mercury in products and industrial processes). Humans have doubled the amount of inorganic mercury in the global atmosphere since pre-industrial times, with substantially greater increases occurring at locations closer to major urban areas. In aquatic ecosystems, some inorganic mercury is converted to methylmercury, the form that ultimately accumulates in fish. The rate of mercury methylation, thus the amount of methylmercury produced, varies greatly in time and space, and depends on numerous environmental factors, including temperature and the amounts of oxygen, organic matter, and sulfate that are present. Methylmercury enters aquatic food webs when it is taken up from water by algae and other microorganisms. Methylmercury concentrations increase with successively higher trophic levels in the food web--a process known as bioaccumulation. In general, fish at the top of the food web consume other fish and tend to accumulate the highest methylmercury concentrations. This report summarizes selected stream studies conducted by the U.S. Geological Survey (USGS) since the late 1990s, while also drawing on scientific literature and datasets from other sources. Previous national mercury assessments by other agencies have focused largely on lakes. Although numerous studies of mercury in streams have been conducted at local and regional scales, recent USGS studies provide the most comprehensive, multimedia assessment of streams across the United States, and yield insights about the importance of watershed characteristics relative to mercury inputs. Information from other environments (lakes, wetlands, soil, atmosphere, glacial ice) also is summarized to help understand how mercury varies in space and time."--Major Findings and Implications.

Download or read book Minnesota s Environment written by and published by . This book was released on 1993 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pollution Control Agency written by Minnesota. Legislature. Office of the Legislative Auditor. Program Evaluation Division and published by . This book was released on 1991 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Comments Submitted on the Draft Generic Environmental Impact Statement Study on Timber Harvesting and Forest Management in Minnesota written by and published by . This book was released on 1993 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: