Due to climate change, it is anticipated that current tree populations will be exposed to very different environmental conditions from the current conditions. Assisted migration is a potential management strategy, but the planted trees are confronted with more rigorous conditions, especially during their early establishment phase. We have established an experiment in the Quebec mixed forest to better understand vulnerability of trees planted for assisted migration. Nine thousand seedlings of 9 different species and 3 provenances, representing current climate, that of 2050 and of 2080, were planted and subject to treatments testing different abiotic and biotic constraints : microclimate, herbivory (exclosures) and vegetation competition. We are seeking a PhD candidate interested in working