Florian Leeseis a Professor and Head of the Aquatic Ecosystem Research Group at the University of Duisburg-Essen. His research focuses on the biodiversity of aquatic ecosystems and how it is affected by anthropogenic stressors. A key part of his work involves developing and applying innovative tools and concepts for monitoring biodiversity and ecosystem state, as well as for assessing and analysing genetic biodiversity data. He also uses molecular markers to study factors affecting the special and temporal occurrence of species populations.