Since 1st January 2010 most of the researchers of the Institut des Mers du Nord have joined the Territoires, Villes, Environnement et Société laboratory (TVES) of the University of Lille 1 (U.S.T.L.). This operation is the fruit of a shared and collective project which respects the specificities of each of the places of research and the identity of their disciplines. It thus associates the orientations of research of IMN; an approach to port and coastal spaces as places for the expression of an interaction between the continental aspect of the sea and the maritime aspect of the continent; the analysis of the phenomena of permanent production and re-composition of urban territories in the context of the dynamics of the stakeholders. This reinforced laboratory now comprises about forty researchers. It is composed with 2 orientations of research and a transversal workshop: - 1st Orientation : Urban mutations, social mutations, mobility and development policies - 2nd Orientation : Environment, risks, nature and society.