Thomas Mehner is vice director and senior researcher at the Leibniz Institute of Freshwater Ecology and Inland Fisheries in Berlin, Germany. He is limnologist and fisheries biologist by training, has got his PhD at the University of Rostock in 1992, and has received his habilitation in limnology in 1999. He has published about 170 ISI papers, with focus on fish communities, lake food webs, and evolutionary and behavioural ecology of aquatic organisms. He has been Handling Editor of ‘Aquatic Ecology’ and ‘Freshwater Biology’ for several years, and he is currently member of the Editorial Boards of ‘Global Change Biology’ and ‘Limnologica’. Since spring 2018, he has been the president of the International Society of Limnology (SIL). Thomas Mehner has taught courses on Limnology, Fish Ecology, Fisheries Management, Behaviour and Evolution, and Scientific Writing. He has trained many MSc and PhD students, and is actively mentoring undergraduates, graduates and post-doc researchers. Klement Tockner is president of the Austrian Science Fund – FWF, full professor of Aquatic Ecology at the Freie Universität Berlin and former director of the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin. He received a PhD from the University of Vienna (1993) and a Titulary Professorship at ETH (2005). He is an internationally leading freshwater scientist, in particular in the research domains biodiversity, ecosystem science and environmental management. He was Editor in Chief of the journal Aquatic Sciences and is Subject Editor of the journal Ecosystems. He has published more than 250 scientific papers including 150 ISI papers. In 2009, he edited a comprehensive book on European Rivers (Rivers of Europe, Elsevier). Klement Tockner has successfully managed large inter- and transdisciplinary projects such as the EC-funded project BioFresh (www.freshwaterbiodiversity.eu). He is member of several scientific committees and advisory boards and elected member of the Austrian Academy of Sciences and the Germany Academy of Sciences, Leopoldina.
