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Linking Selenium Sources to Ecosystems: San …

Marine sedimentary rocks of the Coast Ranges contribute selenium to soil, surface water, and ground water in the western San Joaquin Valley, California. Irrigation funnels selenium into a network of subsurface …

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Linking Selenium Sources to Ecosystems: Irrigation Active

Adverse effects of selenium (Se) on fish and waterfowl in wetlands receiving agricultural drainage occurred in the 1980s in the San Joaquin Valley of California. The identified mechanisms of Se enrichment helped resolve Se toxicity problems associated with irrigated agriculture in the arid West. Bioaccumulation of Se in ancient marine sediments is postulated …

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Linking Selenium Sources to Ecosystems: Mining

Linking Selenium Sources to Ecosystems: Local and Global Perspectives The sources, biogeochemistry, and ecotoxicology of selenium (Se) combine to produce a widespread potential for ecological risk such as deformities in birds and fish.

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Linking Selenium Sources to Ecosystems: Understanding the …

This case-study of selenium pollution of Lake Koocanusa from coal mining in the upper Elk and Fording River watersheds relates to an overall goal of linking geologic source …

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Chapter 16 Selenium loading through the Blackfoot River …

T.S. Presser et al. Selenium sources and source drainage Regional Se drainage, as measured at the gaging station, is linked to release of Se through mining activities associated …

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Selenium in Ecosystems: Ecosystem-Scale …

Linking Selenium Sources to Ecosystems: Local and Global Perspectives The sources, biogeochemistry, and ecotoxicology of selenium (Se) combine to produce a widespread potential for ecological risk such as …

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Chapter 16 Selenium loading through the Blackfoot River …

The upper Blackfoot River watershed in southeast Idaho receives drainage from 11 of 16 phosphate mines that have extracted ore from the Phosphoria Formation, three of which are presently active. Toxic effects from selenium (Se), including death of livestock and deformity in aquatic birds, were documented locally in areas where phosphatic shales are exposed (Piper …

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Evidence of selenium transport from Elk River Valley, Canada …

Selenium is an essential nutrient with a narrow gap between enough for life and too much for life. Mining operations have been linked to releasing selenium into rivers and streams, where it can accumulate in aquatic ecosystems and disrupt the development of egg-laying organisms like fish and birds. Recent research shows that selenium travels farther from …

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Selenium in Ecosystems: Petroleum Basins and …

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map …

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Selenium in Ecosystems: Time Distribution of Phosphate …

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map of the global distribution of Se source rocks informs potential areas of reconnaissance for modeling of Se risk including the ...

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Selenium in Ecosystems: Mountaintop Coal …

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map …

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Stream and Riverine Ecosystems | U.S. Geological Survey

Linking Selenium Sources to Ecosystems: Local and Global Perspectives The sources, biogeochemistry, and ecotoxicology of selenium (Se) combine to produce a widespread potential for ecological risk such as deformities in birds and fish.

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Selenium Assessment in Aquatic Ecosystems

Using his twenty-year experience, the author discusses the effects of selenium on fish and bird populations and presents guidelines for identifying sources of pollution, interpreting selenium concentrations, assessing hazardous conditions, setting water quality criteria and ecosystem loading limits (TMDLs).

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Evidence of Long-Range Transport of Selenium …

Mining and metal-mineral processing are among the main sources of selenium released into the environment. Excessive levels of selenium may induce toxicity in human as selenosis, in grazing animals as alkali disease and in aquatic …

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A methodology for ecosystemscale modeling of selenium

In this paper, we present an ecosystem-scale methodology that reduces uncertainty by systematically quantifying each of the influential processes that links source inputs of Se to …

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Selenium in Ecosystems: Global Plot of Phosphate and …

An official website of the United States government. Here's how you know

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Chapter 16 Selenium loading through the Blackfoot River …

Oxidized Se and associated metals can infiltrate and leach into the surrounding soils, surface water, and groundwater. Selenium release is of particular concern in coal, phosphate, and uranium ...

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Selenium in Ecosystems: Deformed American Coot Embryo

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map of the global distribution of Se source rocks informs potential areas of reconnaissance for modeling of Se risk including the ...

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Selenium in ecosystems within the mountaintop coal mining …

Coal and associated waste rock are among environmental selenium (Se) sources that have the potential to affect reproduction in fish and aquatic birds. Ecosystems of southern West Virginia that are affected by drainage from mountaintop coal mines and valleys filled with waste rock in the Coal, Gauley, and Lower Guyandotte watersheds were assessed during 2010 …

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Linking Selenium Sources to Ecosystems: Local and Global …

The sources, biogeochemistry, and ecotoxicology of selenium (Se) combine to produce a widespread potential for ecological risk such as deformities in birds and fish. Linking the understanding of source characteristics to a mechanistic, biodynamic dietary model of Se exposure on an ecosystem-scale improves the prediction of Se effects and its potential …

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Chapter 16 Selenium loading through the Blackfoot River …

In addition to the magnitude of regional Se release in the Blackfoot River watershed, Se concentrations in individual source drains and waste-rock seeps, and those predicted by experimental column leaching of proposed mining overburden materials, also indicate that drainage options that currently meet existing demands for phosphate mining cause eco- logical …

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Linking Selenium Sources to Ecosystems: Refining

Five oil refineries process crude oil and discharge selenium (Se) to the San Francisco Bay-Delta Estuary (Bay-Delta) (Figures 1 and 2). Organic-rich marine basins are the primary source of elevated concentrations of Se in crude …

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Selenium in Ecosystems: Schematic of Mountaintop Coal Mining …

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map of the global distribution of Se source rocks informs potential areas of reconnaissance for modeling of Se risk including the ...

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Ecosystem Functions and Processes | U.S. Geological …

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map of the global distribution of Se source rocks informs potential areas of reconnaissance for modeling of Se risk including the ...

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Linking Selenium Sources to Ecosystems: San …

To understand the effects of changing selenium inputs, scientists have developed the Bay-Delta Selenium Model. U.S. Department of the Interior U.S. Geological Survey Fact Sheet 2004-3091 August 2004 Linking Selenium Sources to Ecosystems: San Francisco Bay-Delta Model The Bay-Delta Selenium Model is a systematic linked approach for

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A methodology for ecosystem-scale modeling of selenium

The main route of exposure for selenium (Se) is dietary, yet regulations lack biologically based protocols for evaluations of risk. We propose here an ecosystem-scale …

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Theresa Presser | U.S. Geological Survey

Theresa Presser is a Emeritus Research Chemist with the Earth System Processes Division of the USGS Water Resources Mission Area in Menlo Park, California.

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Impacts of Selenium on the Biogeochemical Cycles of …

Impacts of Selenium on the Biogeochemical Cycles of Mercury in Terrestrial Ecosystems in Mercury Mining Areas Download book PDF. Download book EPUB. Overview Authors: Hua Zhang 0; Hua Zhang. Norwegian Institute for Water Research, Oslo, Norway ... Offers insights from a new perspective on selenium in traditional risk assessment of environmental ...

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Linking selenium sources to ecosystems [electronic …

Linking selenium sources to ecosystems [electronic resource] : San Francisco Bay-Delta Model / [Theresa S. Presser and Samuel N. Luoma] View online Order a copy. Bib ID: 4470909 Format: ... Selenium : a short review of its production and utilization with reference to the current shortage / by R. Ashton, E. G. Hill [and] D. Neville-Jones ...

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Linking Selenium Sources to Ecosystems: Local and Global …

Ecosystem-scale selenium modeling conceptualizes processes and parameters important for quantifying and understanding the effects of selenium in the environment. The …

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Linking Selenium Sources to Ecosystems: San Francisco …

Linking Selenium Sources to Ecosystems: San Francisco Bay-Delta Model . U.S. Department of the Interior. U.S. Geological Survey. Fact Sheet 2004-3091. August 2004 . ... The Bay-Delta Selenium Model is a systematic linked approach for conducting forecasts of selenium (Se) effects on aquatic food webs including higher trophic level animals such ...

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Linking selenium sources to ecosystems: San Francisco Bay …

Marine sedimentary rocks of the Coast Ranges contribute selenium to soil, surface water, and ground water in the western San Joaquin Valley, California. Irrigation funnels selenium into a network of subsurface drains and canals. Proposals to build a master drain (i.e., San Luis Drain) to discharge into the San Francisco Bay-Delta Estuary remain as controversial today as they …

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Selenium in Ecosystems: Valley Fill of Mud River

Linking Selenium Sources to Ecosystems: Mining Environmental sources of selenium (Se) such as from organic-enriched sedimentary deposits are geologic in nature and thus can occur on regional scales. A constructed map …

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Selenium loading through the Blackfoot River watershed: linking sources …

Life cycle of the phosphoria formation from deposition to the post mining environment: 437-466 2004

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