The study of the land-sea continuum

The coastal zone, at the interface between the earth system and the sea system, concentrates a set of interfaces and natural environmental gradients, generating a very strong heterogeneity at different spatio-temporal scales. Scientific questions are therefore numerous to try to better understand the nature and dynamics of physical, biological and geochemical flows and forcings, and their interactions and feedbacks (prospective SIC-INSU). Extremely dynamic and complex, this coastal zone is also the seat of many facets of global change with climate change of course, but also strong and growing anthropogenic pressures related to urban planning, land use, exploitation mineral and living resources on land and at sea. In this context, our objectives are threefold:

● develop an integrated approach to land-to-sea transfers of dissolved and particulate matter, combining observation, process studies and modeling in estuaries and coastal areas to better understand the coastal ecosystem’s response to physical, biogeochemical forcings and biological, terrestrial and oceanic (Axis 1 of Team 3);

● Anticipate the possible evolution of the coastal ecosystem in response to global change, by developing scenarios describing the response of organisms and the coastal ecosystem to the interaction of different facets of global change: climate change, change in farming practices evolution (natural or not) of invasive species (Axis 1 of team 3, strong links to develop with the AR5 of team 2), and

● to develop a transdisciplinary approach allowing the co-construction of these scenarios and their analysis with the concerned actors, with a view to decision support in the sustainable management of the coastal socio-ecosystem (links with the “Rade de Brest” axis And with the “unruly” axis, links with the other components of the IUEM).