My work focuses on the impact of tree species interactions on forest ecosystems functioning. I am particularly interested in the impact of these interactions on productivity and how climate, disturbances and environmental gradients change tree species interactions. We use tree ring and national forest inventories data. In 2011, we also set up an experiment in oak-pine forests (OPTMix, see optmix.inrae.fr) to evaluate if low density and mixture are relevant strategies to face climate change.