In response to the issues identified by the sector and the questions raised by citizens concerning the environmental integration of marine renewable energies in France, the COME3T approach aims to provide elements of expertise, synthesis and recommendations based on a national network of experts. In this bulletin, 3 experts have worked together to define the reef effect and its consequences on fish populations and all mobile species.

Auteur(s): Bord Jean - Huguet Jean - Prevost Herve, Projet de restructuration urbaine pour Cestas. (Aucun plan n'accompagne cette étude).

Technology readiness levels are a widely used metric of technology maturity and risk for marine renewable energy devices. To-date, a large number of device concepts have been proposed which have reached the early validation stages of development. Only a handful of mature designs have attained pre-commercial development status following prototype sea trials. In order to navigate through the aptly named “valley of death” towards commercial realisation, it is necessary for new technologies to be de-risked in terms of component durability and reliability. In this paper the scope of the reliability assessment module of the DTOcean design tool is outlined including aspects of tool integration, data provision and how prediction uncertainties are accounted for

Auteur(s): Duolé Igor , Projet d'un pont habité dans la partie sud de Bordeaux, s'inscrivant dans le projet urbain Euratlantique

Backup of the data used for characterising the different biofouling monitoring protocols in an excel file.

The consequences of climate change for marine organisms are now well-known, and include metabolism and behavior modification, distribution area shifts and changes in the community. In the Bay of Biscay, the potential environmental niches of subtropical non-indigenous species (NIS) are projected to expand as a response to sea temperature rise by the mid-century under the RCP8.5 climate change scenario. In this context, this study aims to project the combined effects of changes in indigenous species distribution and metabolism and NIS arrivals on the functioning of the Bay of Biscay trophic network. To do this, we created six different Ecopath food web models: a “current situation” trophic model (2007–2016) and five “future” trophic models. The latter five models included various NIS biomass combinations to reflect different potential scenarios of NIS arrivals. For each model, eight Ecological Network Analysis (ENA) indices were calculated, describing the properties of the food web resulting from the sum of interactions between organisms. Our results illustrate that rising temperature increases the quantity of energy passing through the system due to increased productivity. A decrease in the biomass of some trophic groups due to the reduction of their potential environmental niches also leads to changes in the structure of the trophic network. The arrival of NIS is projected to change the fate of organic matter within the ecosystem, with higher cycling, relative ascendency, and a chain-like food web. It could also cause new trophic interactions that could lead to competition and thus modify the food-web structure, with lower omnivory and higher detritivory. The combined impacts (increasing temperatures and NIS arrivals) could lower the resilience and resistance of the system.

Auteur(s): Etomba Jean-Gabriel , Restructuration du centre ville de Bruges, banlieue de l'agglomération bordelaise.

Auteur(s): Gauthier Veronique , Implantation d'un cimetière urbain dans le quartier Meriadeck a bordeaux.

Auteur(s): Birault Jacques , Réutilisation des entrepôts de la Chambre de Commerce, situés cours du Médoc, pour en faire un lieu d'échanges et de communication

Report describing the methodology and results of the simulations