Annual Streams Drying up
Small streams that dry up for part of the year are easy to overlook. But these intermittent streams are everywhere, making up more than half of Earth’s waterways. They help purify surface water and provide crucial habitat for creatures such as the Sonoran Desert toad, fairy shrimp, and Wilson’s warbler. Now, a study has found that ephemeral streams across the continental United States have become less reliable over the past 40 years, likely as a result of climate change. Some are dry for 100 days longer per year than in the 1980s.
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