At Ecotoxicology we study the effects of chemical contaminants on organisms in the environment. We develop and apply ecotoxicity tests to evaluate effect endpoints all the way from the molecular level up to the functioning of entire ecosystems. Our studies integrate field monitoring, experimental and modelling approaches, building bridges between ecotoxicology, environmental toxicology, ecophysiology and stress ecology. The main aim of our research is to improve our understanding of mechanisms of toxic action. We also study how environmental science is used for agency decision-making and develop novel approaches to facilitate the use of scientific data in regulatory risk assessment and risk management. We work closely with national and international regulatory agencies, non-governmental organizations and actors in the private sector to address current environmental problems.