Lake Tahoe hasn't been this clear since the 1980s. The primary cause is an abundance of microscopic zooplankton.
The once famously clear water of California’s Lake Tahoe appears to be on the rebound.according to a reportThe primary cause for the clarity is an abundance of microscopic zooplankton that eat other tiny particles that cloud the lake, researchers said.And the reason there are so many zooplankton is a sudden and unexpected drop in the population of shrimp that eat them, according to the report.
The plankton “provided a natural clean-up crew to help restore the lake’s famous blue waters,” the report said. The last time the lake was this clear was in the 1980s. Researchers have been studying the lake’s clarity for more than 50 years, and the technique remains charmingly low-tech. They lower a white disk the size of a dinner plate and record how much line has paid out when the plate disappears.There are many causes, including water temperature and runoff of pollutants from land and the streams that feed into the lake.
But the clean water is likely to be short-lived. The scientists didn’t say what caused the decline in“Future management actions should explicitly look at incorporating ways of controlling the
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