Benthic biodiversity of the tidal test site of Paimpol-Bréhat assessed by video imagery
|Author(s)||Carlier Antoine1, Caisey Xavier1, Derrien-Courtel Sandrine3, Catherine Elodie3, Soubigou Olivier2, Gaffet Jean-Dominique1, Lejart Morgane4|
|Affiliation(s)||1 : Ifremer, Laboratoire d'Ecologie Benthique Côtière, ZI Pointe du Diable, 29280 Plouzane, France
2 : Ifremer, Service Navires et Equipements, ZI Pointe du Diable, 29280 Plouzane, France
3 : MNHN, Station de Biologie Marine, BP 225, 29182 Concarneau Cedex, France
4 : France Energies Marines, Technopôle Brest Iroise, Bâtiment Cap Ocean, 29280 Plouzane, France
|Keyword(s)||Benthic biodiversity, Hard bottom communities, Marine renewable energy, tidal turbine, Benthic habitat, Reference ecological state, subsea power cable|
Marine tidal energy technology is still in its infancy in France and potential environmental impacts on the seabed are virtually unknown. The first French pilot project is currently launched close to Paimpol and the Bréhat Island (Brittany). Environmental monitoring has started in 2012 to assess the baseline of benthic compartment before deployment and the grid-connections of the 4 turbines. The Paimpol-Bréhat tidal site is located on a hard rocky bottom where conventional benthic survey techniques are unsuitable. This paper describes the methodology used to assess the initial state of benthic communities on the turbines and cable deployment area and presents the first results of the mapping and monitoring of the targeted benthic ecosystem.