Lake Tahoe, the world’s clearest large lake, could become even clearer over the next few years due to changes in its plankton population, scientists said in a new report. Researchers at UC Davis last week released their annual “State of the Lake” report, detailing several significant changes in Tahoe’s water, including the plunging level of Mysis shrimp, a type of zooplankton, which could increase clarity. The team of scientists predicted that the drop in the population of Mysis shrimp will have a cascading effect on the lake.