Mats Grahn

Mats Grahn is a Professor at Södertörn University, affiliated with the Natural Sciences, Technology and Environmental Studies school. His research focuses on evolutionary biology, genetics, and environmental sustainability, particularly studying genetic diversity in marine and terrestrial species. He leads a major project on PFAS pollution in the Baltic Sea, investigating how these 'forever chemicals' affect aquatic organisms and ecosystems. Grahn also teaches courses in evolution, population genetics, and statistics, supervising student research projects.

His work spans conservation genetics, population genomics, and ecotoxicology. Key research areas include the maintenance of genetic variation in wild populations, impacts of environmental contaminants like PFAS, and the role of major histocompatibility complex (MHC) genes in immune function. Collaborations include international teams studying coral reefs, Baltic Sea mussels, and fish populations.

Current initiatives involve quantifying PFAS concentrations near sewage treatment plants and assessing their ecological effects using novel fluorine mass balance (FMB) techniques. Grahn's projects emphasize interdisciplinary approaches, integrating molecular genetics with environmental monitoring and policy advocacy.