|REBENT Workshop Journées Rebent 2006|
Principles of REBENT
The REBENT project was set up in the wake of the Erika wreckage (oil spill) and aims at producing a reference statusof coastal benthic ecosystems -flora and fauna- and at ensuring benthic monitoring, in order to detect any modifications in these ecosystems (of chronic or accidental origins).
Brittany was selected as the pilot-region for the REBENT project. The preliminary project, implemented in 2001-2002, included the strategy and methods, the operational schedule and distribution of work to the different partners. Priority was given to recurrent needs common to the different regulations. Operations started in 2003.
Harmonization of data
The historical biological data have been improved and harmonized at the regional level, and a first inventory of remarkable habitats was made. With the support of the European Interreg MESH project (Mapping European Seabed Habitats), new methods on the detailed mapping of seabed habitats –using numerous modern tools (satellite and airborne sensing, acoustics, underwater video, Geographic Information Systems, etc)- have been implemented in reference coastal zones.
Treatment of archives
The analysis of recent images and archives has helped monitor the spatial dynamics of the vegetal cover on tidal flats. More localized biodiversity monitoring has been implemented on a selection of remarkable habitats and/or well represented habitats. In tidal zones, they concern fine sediments, sea grasses and some types of rock masses. On the shallow sea floor (0 to 40 metres deep), they concern fine sands, maerl beds and rocky sea floors, studied when diving. Selected monitoring points are located along the coastline and each habitat is regularly sampled according to a protocol.
Results and propects
The most significant results, as well as evolution prospects, were presented during the REBENT-Bretagne workshop held in Rennes (Brittany) on May 16, 2006, in reply to new regulations (Water Directive).
Once these studies were reported, round-table discussions -bringing together the main organizations and institutions concerned by benthic monitoring- were held to analyse synergies and methods of organization thus ensuring a permanent network adapted to the various needs. The first round-table, held on May 16, 2006 and organized by Brigitte Guillaumont (IFREMER, Dyneco/Vigies, Brest) and Hervé Morisset (DIREN Bretagne, Rennes) focussed its attention on Brittany. The second round-table, on May 17, was organized by Patrick Le Mao (IFREMER, LERSM, Saint-Malo) and concerned the development of the REBENT network along the French coastlines (Metropolitan France).
Présentation du Réseau de surveillance BENThique (REBENT) : mise en place et réalisations du pilote breton