Daphnia: The Secret Behind Madison Lakes' Clear Water Phase

North Temperate Lakes LTER researcher, Ted Bier, shows off his zooplankton catch during a sampling trip on Lake Monona in Madison, Wisconsin. The thousands of zooplankton (called daphnia pulicaria) in this jar are a major driver of clear-water phase - they eat phytoplankton and algae almost as fast as it can grow!