Utah’s Great Salt Lake is smaller and saltier than at any time in recorded history, putting a critical feeding ground for millions of migrating birds at risk.
Utah’s Great Salt Lake is smaller and saltier than at any time in recorded history. In July, the U.S. Geological Survey reported that the world’s third-largest saline lake had dropped to the lowest level ever documented. And last week researchers measured the highest salt concentrations ever seen in the lake’s southern arm, a key bird habitat. Salinity has climbed to 18%, exceeding a threshold at which essential microorganisms begin to die.
After years of inaction, the prospect of a dying lake, plus the risk of harmful dust blowing from the dry lakebed, is galvanizing policymakers to find ways of restoring water to the shrinking lake. NASA satellite images from June 1985 and July 2022 highlight how Utah’s Great Salt Lake has shrunk to the lowest level recorded since measurements began in the 1840s. Use the slider to see the two images.
Soon the brine shrimp could dwindle as well. “The fear is that in some future year, [the lake] will become so salty that its populations … will collapse,” a pair of state ecologists wrote recently.
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