I am interested in the positive (facilitation, complementarity) and negative (competition) interactions affecting the functioning of trees integrated into agricultural plots (alley cropping agroforestry) compared to forest monocultures. Tree functioning is studied through all the factors contributing to its biomass production: primary and secondary aboveground and belowground growth, architecture, phenology, resource use efficiency, etc. These determinants of productivity are estimated at the organ level (leaves, branches, wood, roots), at the tree level, and then extrapolated to the stand level. Another aspect of my work concerns the study of the services provided by trees in agricultural environments: carbon storage, microclimate buffering, increased biodiversity, improved soil water management, etc.