Posts tagged: streams
FISHERIES — A new study says a metal-like element called selenium is leeching from coal mines into the Elk river drainage in southeastern British Columbia, threatening fish habitat in Canada and downstream in Montana.
The study found five coal mines in the Elk River Valley are causing toxic pollution, and four of the coal mines are planning expansions.
The Missoulian reports a new coal mine proposal and three exploration projects are also under way.
The executive director of a conservation group called Wildsight says the selenium affects reproductive organs in fish and could lead to a population collapse.
The Elk River joins the Kootenai River at Lake Koocanusa.
The study was commissioned by Glacier National Park and carried out by the University of Montana’s Ric Hauer and Erin Sexton.
Expect more information on this alarming development.
FISHING — Warmer water temperatures being recorded in North Idaho streams and rivers are creating unhealthy conditions for trout, especially the region's westslope cutthroats, Idaho environmental officials said.
A recent analysis by the Idaho Department of Environmental Quality shows that nearly 900 miles of streams in Kootenai and Shoshone counties are reaching temperatures up to 80 degrees in warmer months, well above the optimal temperature of 55 degrees or colder for trout species that attract legions of fly fishers.
The biggest factor to the warming trend is excessive sun exposure and lack of tree cover that provides shade and protection, Kajsa Stromberg, DEQ spokeswoman, told the Coeur d'Alene Press in a story published Tuesday.
In addition, Forest Service and Idaho Fish and Game studies over the years have documented major losses of deep holes and stream structure trout would seek to survive such conditions. Historic mining, logging and road-building practices contributed to the problems.
The region most affected by the warmer waters is the North Fork Coeur d'Alene River Sub basin, a region with a national reputation for producing great cutthroat trout fishing.
The warmer temperatures have a variety of negative impacts on trout, from making the fish lethargic to heightened risk and exposure to potentially threatening disease.
THE GOOD NEWS is that the DEQ is proposing a plan to lower water temperatures and improve access to colder, deeper waters to help reverse the warming trend.
The agency is taking written comments on the proposal until April 10, followed by a public hearing. The agency will also submit its draft plan to the Environmental Protection Agency for review.
THE BAD NEWS is that the online reaction to the CdA Press story on this issue was dominated by comments suggesting the DEQ's proposal is an example of government waste or a “liberal” reaction to climate change.
God help us if such ignorance is allowed to guide our stewardship of natural resources.
FISHING — Native cutthroat trout are likely to feel the heat from climate change.
A new study shows a changing climate could reduce suitable trout habitat in the western U.S. by about 50 percent over the next 70 years, with some trout species experiencing greater declines than others.
The results were reported by a team of 11 scientists from Trout Unlimited, the U.S. Forest Service Rocky Mountain Research Station, Colorado State University, the U.S. Geological Survey and the University of Washington Climate Impacts Group.
The study, published today in the peer-reviewed science journal Proceedings of the National Academy of Sciences, predicts native cutthroat throughout the West could decline by as much as 58 percent, while introduced brook trout could decline by as much as 77 percent. Rainbow and brown trout populations, according to the study, would also decline by an estimated 35 percent and 48 percent respectively. (Read the study report.)
The study notes that the decline of cutthroat trout is “of particular significance,” because cutthroats are the only trout native to much of the West and a keystone species in the Rocky Mountain ecosystem.
Read on for reaction from Trout Unlimited, and some reason for hope.