Tag: Selenium

Coal ash pollution poisoning fish in North Carolina

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Toxic pollution from coal-fired power plants builds up in fresh water fish. @bberwyn photo.

Trump’s proposed Cuts to federal regulations likely to lead to more environmental woes

Staff Report

Coal ash waste is poisoning fish in North Carolina lakes, scientists said this week announcing findings from a new study supported in part by the EPA. The research by scientists from Duke University showed that potentially harmful levels of selenium are building up because of emissions from coal-fired power plants.

“Across the board, we’re seeing elevated selenium levels in fish from lakes affected by coal combustion residual effluents,” said Jessica Brandt, a doctoral student in environmental health at Duke’s Nicholas School of the Environment, who led the study, published this month in the journal Environmental Science & Technology. Continue reading “Coal ash pollution poisoning fish in North Carolina”

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Pollution runs deep in the Colorado River

The confluence of Havasu Creek with the Colorado River (river mile 157) is a popular place for boaters to stop and admire the striking blue-green water of Havasu Creek. The turquoise color is caused by water with a high mineral content. At the point where the blue creek meets the turbid colorado river there often appears a definite break. NPS photo by Erin Whittaker.
The confluence of Havasu Creek with the Colorado River (river mile 157) is a popular place for boaters to stop and admire the striking blue-green water of Havasu Creek. The turquoise color is caused by water with a high mineral content. At the point where the blue creek meets the turbid colorado river there often appears a definite break. NPS photo by Erin Whittaker.

Fish in the Grand Canyon show levels of mercury and selenium that exceed risk thresholds for wildlife

Staff Report

FRISCO — Pollution runs deep in the Colorado River, according to U.S. Geological Survey scientists who recently documented traces of mercury and selenium contamination in fish living in the Grand Canyon.

Similar studies have documented mercury contamination in fish in Rocky Mountain National Park. In the bigger picture, the USGS has also documented mercury contamination in 25 percent of U.S. streams. In the Arctic, polar bears are being exposed to similar contaminants. Continue reading “Pollution runs deep in the Colorado River”

Study eyes selenium impacts to honey bees

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Bees gather on wildflowers in Breckenridge, Colorado.

Exposure can lead to mortality, California researchers say

By Summit Voice

FRISCO — Along with pesticides, heavy metals may also be contributing to the decline of honey bees in some regions, according to entomologists at the University of California, Riverside.

Their research found that four main forms of selenium found in plants cause mortality and delays in development in the honey bee. Study results appear in the Oct. 2013 issue of the journal Environmental Toxicology and Chemistry.

“Metal pollutants like selenium contaminate soil, water, can be accumulated in plants, and can even be atmospherically deposited on the hive itself,” said Kristen Hladun, the lead author of the study and a postdoctoral entomologist. “Our study examined the toxic effects of selenium at multiple life stages of the honey bee in order to mimic the chronic exposure this insect may face when foraging in a contaminated area.” Continue reading “Study eyes selenium impacts to honey bees”