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The Physics Laboratory of Aquatic Systems (APHYS) at EPFL, led by Alfred Johny Wuest, focuses on understanding physical processes in natural waters, particularly the responses of aquatic systems to external influences like nutrient inputs, hydropower production, and climate change. The lab conducts research on Lake Geneva and other Swiss lakes, using cutting-edge technology like the LeXPLORE platform to monitor and forecast water quality. APHYS collaborates with various institutions to explore the mysteries of lakes, studying phenomena such as oxygen depletion, under-ice processes, and primary production. Their work contributes to a deeper understanding of aquatic ecosystems and environmental changes.