Senior scientist and Leader of the Light Pollution and Eco-physiology Group (IGB). Expert in fish bioenergetics, light pollution, eco-physiology, ecological modelling. Assoc. Professor for Zoology at Freie Universität Berlin (FUB). Former Chair of the COST-Action LoNNe (Loss of the Night Network, FP7-ESF, 2012-2016). Associate Editor of J. of Limnology, Member of the Editorial Board International Journal of Sustainable Lighting.