Sunlight glimmers on Lake Tahoe on a spring morning in April as the John LeConte, the 48-year-old research vessel for the UC Davis Tahoe Environmental Research Center, motors across the glassy water.

READ MORE: <a href=" Lake Tahoe is the second deepest lake in North America, with a maximum depth of 1,645 feet. Onboard the 48-year-old UC Davis research vessel named the John LeConte, the research ...