we will explore what makes understanding forests and their responses to environmental change so challenging across disciplines and scales. How can we disentangle underlying processes, scale our understanding from organs and individual trees to ecosystems and landscapes, or bridge the gap between controlled experiments and the complexity of real-world conditions? Addressing these challenges increasingly requires us to cross disciplinary boundaries, bringing together different perspectives, methods and technologies. The Science Day will explore the conceptual, methodological and practical challenges we face in advancing our understanding of forests, and the opportunities that interdisciplinary approaches offer to address them.