The project MultiMyco: Multiscale determinants of arbuscular mycorrhizal fungal (AMF) communities, funded by CEBA Labex, and in collaboration with Christina Hazard (EMG group), Melanie Roy (Université Paul Sabatier), Francis Brearley and Jennifer Rowntree (Manchester Metropolitan University), aims to unravel the relative importance of biotic and abiotic factors on AMF, and how host tree genetic diversity influence their communities in a biodiversity hot spot. The CNRS Nouragues Research Station is one of the seven sites sampled during this campaign.