ConnexStere French Mediterranean

A research project launched off the coast of Leucate to better understand the benefits of making offshore wind turbine floats more complex. To this end, two buoys, BoB and OCG-DATA, were deployed for 4 and 2 years, respectively.

Partners and funders

  • EFGL

  • Agence de l'eau Rhône-Méditerranée-Corse

  • Ocean Winds

  • Ocergy

  • CREM

  • Université de Perpignan

  • CNRS

The overall objective of the ConnexStere project was to gather knowledge about the fish and macroinvertebrate species found offshore on and around floating structures and to compare them with better-known artificial coastal sites (ports, harbors, artificial reefs). The project also sought to assess whether relationships, connections, or similarities existed between these coastal sites and the offshore sites.

Project impacts

From a technical standpoint, the buoys and their moorings demonstrated exceptional durability, with no detachment whatsoever, despite challenging weather conditions, including swells exceeding 9 meters. The loss rate was very low, even for the Biohuts attached to the buoys to increase their complexity. Installation, maintenance, and removal proceeded without a hitch.

From a biological perspective:
- Better understanding of the fish species inhabiting the area, thanks to the combination of several monitoring methods and the validation of the potential for colonization by coastal species (larval passageway).

- Better understanding of the potential colonization by macroinvertebrates (and, to a lesser extent, sessile flora and fauna), primarily in the Biohuts.
- Several species common to both offshore and coastal areas, for both fish and macro-invertebrates...
- Several species are common to both offshore and coastal areas, including both fish and macroinvertebrates.
- Similar functional diversity between the open sea and the coast.
- Existing connectivity with the open sea confirmed by the presence of species tagged on the coast and observed at the BoB buoy.
- Diverse marine life exists in the open sea at the surface (0–15 m) on floating structures; abundance and species richness are much greater and more diverse than previously imagined.

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Sector concerned

  • Energy specialist

    Are you involved in the renewable energy sector (offshore wind, floating solar) and looking to adopt a proactive environmental approach? We work with you to develop innovative, scientifically sound …

Solutions implemented

  • Biohut®

    Biohut® is an artificial nursery designed to restore the ecological functions of developed areas.