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Articles on Freshwater biology

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Winter road salting is a common de-icing technique used to ensure public safety during icy winters. However, it is crucial to find sustainable and environment-friendly alternatives to road salt. (Shutterstock)

Winter road salting has year-round consequences

Salty water seeps into our soils and groundwater through surface runoff and storm-water pipes. The long-term storage of salt in the environment impacts aquatic life, infrastructure and drinking water.
Environmental DNA is a promising tool for tracking species in freshwater ecosystems like Oregon’s Elkhorn Creek. Greg Shine, BLM/Flickr

Scientists at work: We use environmental DNA to monitor how human activities affect life in rivers and streams

Rivers are among the most embattled ecosystems on Earth. Researchers are testing a new, inexpensive way to study river health by using eDNA to count the species that rivers harbor.
Red-finned blue-eye Bush Heritage Australia / Adam Kerezsy

Australia’s smallest fish among 22 at risk of extinction within two decades

Twenty of these freshwater fish species have a 50% or greater probability of extinction within the next 20 years.
Some lakes in the Arctic are expanding and others are disappearing as permafrost thaws. This lake north of Inuvik, N.W.T., is expanding as the ice wedges (darker lines leading away from the lake) around this lake melt and the ground subsides. (Philip Marsh)

Collapsing permafrost is transforming Arctic lakes, ponds and streams

Hundreds of thousands of lakes, rivers and streams in the Arctic exist only because of the permafrost that lies beneath them. The warming Arctic threatens to change that.

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