Mercury Accumulation in Periphyton of Eight River Ecosystems<sup>1</sup>

Bell, Amanda H.; Scudder, Barbara C.

doi:10.1111/j.1752-1688.2007.00078.x

Cited by 28 publications

(24 citation statements)

References 36 publications

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“…Across the large ranges of environmental conditions encompassed by streams in Oregon, Wisconsin, and Florida, the increases of mercury through food webs were similar to those for previously studied lakes and other aquatic ecosystems (Wiener and others, 2003;Chasar and others, 2009). Methylmercury concentrations in attached algae and other microorganisms were 2,900-1,700,000 times the methylmercury concentrations in water (Bell and Scudder, 2007) (fig. 3-19) and compare well to previously published values of 10,000-1,000,000 (Ward and others, 2010).…”

Section: Chaptermentioning

confidence: 90%

Mercury in the nation's streams - Levels, trends, and implications

Wentz¹,

Brigham²,

Chasar³

et al. 2014

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Library of Congress Cataloging-in-Publication DataWentz, Dennis A. The quality of our nation's waters : mercury in the nation's streams-levels, trends, and implications / by Dennis A. Wentz, Mark E. Brigham, Lia C. Chasar, Michelle A. Lutz, and David P. Krabbenhoft. ForewordThe United States has made major investments in assessing, managing, regulating, and conserving natural resources, such as water, minerals, soil, and timber. Sustaining the quality of the Nation's water resources and the health of our ecosystems depends on the availability of sound water-resources data and information to develop effective, science-based policies. Effective management of water resources also brings more certainty and efficiency to important economic sectors. Taken together, these actions lead to immediate and long-term economic, social, and environmental benefits that make a difference to the lives of millions of people.The U.S. Geological Survey (USGS) is committed to providing the Nation with reliable scientific information that helps to enhance and protect the overall quality of life and that facilitates effective management of water, biological, energy, and mineral resources (http://www.usgs.gov). Information on water resources is critical to ensuring long-term availability of water that is safe for drinking and recreation, and that is suitable for industry, irrigation, and fish and wildlife. Population growth and increasing demands for water make the availability of water, measured in terms of quantity and quality, essential to the long-term sustainability of our communities and ecosystems.Mercury is a pervasive contaminant of streams and lakes, and has resulted in fish consumption advisories in all 50 States. The current report, "Mercury in the Nation's Streams-Levels, Trends, and Implications," presents a summary of results from USGS investigations conducted since the late 1990s on the sources, occurrence, trends, transport, and bioaccumulation of mercury in stream ecosystems. The report draws from studies conducted by several USGS Programs, including the National WaterQuality Assessment, Toxics Substances Hydrology, and National Research Programs. This report is one of a series of publications, The Quality of Our Nation's Waters, which describe major findings of the USGS on...

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Section: Chaptermentioning

confidence: 90%

Mercury in the nation's streams - Levels, trends, and implications

Wentz¹,

Brigham²,

Chasar³

et al. 2014

Circular

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“…The conversion of inorganic mercury to methylmercury is important because methylmercury is more toxic than inorganic mercury and organisms require a longer time to eliminate methylmercury. Methylmercury-containing bacteria may be consumed by the next higher level in the food chain, or the bacteria may release the methylmercury to the water, where it can adsorb to plankton and periphyton (Bell and Scudder, 2007). Plankton are consumed by the next level in the food chain ( fig.…”

Section: Mercury Cycling In Aquatic Ecosystemsmentioning

confidence: 99%

Mercury in Indiana watersheds: Retrospective for 2001–2006

Risch¹,

Baker²,

Fowler³

et al. 2010

Professional Paper

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“…Methylmercury is highly absorbable and more toxic than inorganic Hg; organisms require a longer time to eliminate MeHg than Hg, and the amounts of MeHg in primary producers are preserved in successively higher levels of consumers in individual food chains within the food web (Munthe and others, 2007). Bacteria with MeHg may be consumed by the next higher level in a food chain, or the bacteria may release the MeHg to the water, where it can become part of plankton and periphyton (Bell and Scudder, 2007) that are consumed by the next level in a food chain. The concentration of MeHg magnifies in organisms at higher levels in food chains so that the highest concentrations are found in large, old, top-predator and bottom-feeding fish.…”

Section: Mercury and Methylmercury In The Environmentmentioning

confidence: 99%