Human activities – including for the energy transition – are leading to the steady decline of biodiversity. This is worrying, because where species diversity declines, ecosystems are at risk. Ecosystems involve complex networks of connections and dependencies. Accordingly, challenges within the Healthy Habitats impact area require comprehensive ecosystems knowledge. Both on the eDNA project and on our research into the effects of anthropogenic electromagnetic fields (EMFs), we are building up a solid foundation of this knowledge.