Mongabay: Warming temperatures may cloud Lake Tahoe’s legendary clear waters and put the lake’s native species at risk, reports a new study from the University of California, Davis. The research projects higher temperatures will alter water circulation in the lake, dramatically altering the conditions for its flora and fauna. "What we expect is that deep mixing of Lake Tahoe’s water layers will become less frequent, even non-existent, depleting the bottom waters of oxygen. This …