The Marine Interactions research group explores marine food webs and human impact on coastal ecosystems. In a time where human activities have become the dominant driver of Earth system processes, our seas and oceans are crucial for buffering climate change and maintaining biodiversity and the associated delivery of ecosystem services. We use network science and trait-based approaches in combination with long-term, large-scale monitoring data as well as targeted field sampling and mesocoms studies to assess how the changing marine environment influences biodiversity and ecosystem functioning. The research group works across a range of marine ecosystems, from the intertidal to the deep sea, from the Baltic Sea to the Arctic, the North Sea, and Mediterranean-climate areas.