Road salt, development blamed for spiking chloride levels
Lakes from New England to the Midwest are getting saltier from the massive use of chemicals to melt ice on roads, as well as from urban development. Under the current trend, many North American lakes will surpass EPA-recommended chloride levels in 50 years, spelling trouble for aquatic ecosystems.
A short photographic stroll through a city that consistently ranks near the very top worldwide for quality of life. Vienna’s coffee houses and parks are definitely part of its charms, but it’s also a European hub science, culture, literature and tech innovation. And there are connections to my old stomping grounds in Colorado. For example, I spent several years following the story of how parasitic whirling disease wiped out most of Colorado’s rainbows, and how biologists were working to restore the popular game fish with a population resistant to the disease. Then last summer, as I was working on a story about a massive fish die-off in the Yellowstone River, my research led me to an Egyptian-born research scientist at the University of Vienna who has been studying various parasitic trout diseases, and linking them with global warming. Turns out that Mansour El-Matbouli also was an instrumental figure in the efforts to breed the strain of rainbow trout that are resistant to whirling disease, and that he had worked closely with aquatic biologists in Colorado that I also had interviewed for my stories in Colorado. We’re facing global environmental challenges, and they require a global and science-based response. It’s a small world.
Trump’s proposed Cuts to federal regulations likely to lead to more environmental woes
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”→
As if toxic waste from chemical manufacturing and other industrial processes weren’t enough, scientists say some streams are also being fouled by remnants of amphetamines — in some cases at high enough levels to alter the base of aquatic food chain.
A new study, published in the journal Environmental Science & Technology, traced the presence of illicit drugs at six stream sites around Baltimore, focusing on the Gwynns Falls watershed, which is part of the Baltimore Ecosystem Study Long-Term Ecological Research program. Two rural streams were also sampled in the Oregon Ridge watershed, the closest forested region. Continue reading “Study tracks amphetamine pollution in Baltimore streams”→
Many streams are at risk from pharmaceutical pollution
Traces of pain-relieving substances, diabetes drugs and allergy medicines are widespread in small streams across the Southeast, especially in urban zones like Raleigh, North Carolina, the U.S. Geological Survey found in a new study.
Colorado’s continued unsustainable use water has taken a toll on trout in the Blue River, where Colorado Parks and Wildlife biologists have decided to remove the gold medal designation from a 19-mile reach stretching from just north of Silverthorne to Green Mountain Reservoir.
According to CPW aquatic biologist Jon Ewert, unnatural stream flows, sparse aquatic invertebrate populations, low nutrient content and degraded habitat all contributed to the decline of the fishery. The agency said that stretch of the river hasn’t met the Gold Medal standard for about 15 years.
There’s better news farther downstream, where CPW designated a 24-mile reach of the Colorado River, from Canyon Creek, at the mouth of Gore Canyon, to the confluence of Rock Creek, near the town of McCoy, as a new gold medal fishery. In Colorado, Gold Medal status is reserved for state waters that produce a minimum of 60-pounds of trout per acre and 12 trout measuring 14-inches or longer per acre. Continue reading “Blue River loses gold medal trout stream designation”→