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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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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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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: 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 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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Selenium in Ecosystems: Global Plot of Phosphate and …

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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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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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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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Selenium loading through the Blackfoot River watershed--linking sources …

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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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 Assessment in Aquatic Ecosystems

Using his twenty-year experience, the author discusses the effects of selenium on fish and 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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Linking Selenium Sources to Ecosystems: Refining Active

The San Francisco Bay-Delta receives selenium (Se) internally from oil refineries and externally through riverine agricultural discharges. Predator species considered at risk from Se consume the estuary's dominant bivalve, C. amurensis, an efficient bioaccumulator of Se. Modeling predicts site-specific ecological risk and derives a range of protective Se concentrations for use by …

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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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Selenium loading through the Blackfoot River watershed--linking sources …

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 pr

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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 …

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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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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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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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 ia 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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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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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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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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Lake and Wetland Ecosystems | U.S. Geological Survey

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: 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: 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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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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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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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 ...