Six laboratories from five countries will be involved in this mesocosms experiment. The ‘Laboratoire d’Océanographie de Villefranche‘ is in charge of the organization and mesocosms installation. The scientists from the other laboratories will join us in Villefranche mid-February, they will install their material and take water sample every days for one month. Four italian scientists from OGS in Trieste and six greeks from HCMR in Athens will arrive from the East. One spanish PhD student from UAB in Barcelona and three french women will arrive from Lamp in Clermont-Ferrand. And, to finish, two english scientists will move down from PML in UK.