Prof. Sergei Petrovskii is a Chair in Applied Mathematics in the School of Computing and Mathematical Sciences and an associated member of the Institute for Environmental Futures at the University of Leicester (UK). He is an applied mathematician with over 30 years of research experience in mathematical ecology and ecological modelling, with a special focus on modelling complex multiscale environmental and ecological systems. His research on the effect of global warming on ocean deoxygenation, where he discovered a new type of ecological catastrophe potentially leading to mass extinction, has been published in high-ranked scientific journals and highlighted by media around the world. Other topics include biological invasions, mass extinctions in Earth’s deep past, and anomalous long transient dynamics in ecosystems and ecologically-inspired models. He published five books and 170 papers in peer-reviewed journals. He is the “Mathematical Biology” Section Editor of Mathematics, an Associate Editor of the Journal of Mathematical Biology and an editorial board member of Physics of Life Review.