With so much of the fresh water lost to evaporation, what's left is highly concentrated with minerals and very salty. And that has left the turtles in bad shape.

The USGS researchers called Shaffer when they noticed that not only were the turtles lethargic, but some of their heads, feet and shells were coated in a thick white crust of mineral deposits.

"Some of them looked like ceramic turtles," Shaffer said. "Between the biologists who were out there and me, we have a hundred years of turtle experience and we had never seen turtles look like this."

So they mobilized, collecting 60 turtles from the arid lakebed and transporting half to the Turtle Conservancy's captive breeding facility in Ojai, and the other half to UCLA, where Shaffer and his team set up a reptile refugee camp on the roof of the botany building.