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                        <gmx:Anchor xlink:href="https://vocab.ifremer.fr/scheme/SXT/cersat_latency">Cersat - Latency</gmx:Anchor>
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                              <gco:Date>2025-12-09</gco:Date>
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            <gmd:MD_LegalConstraints>
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                  <gco:CharacterString>Limitée aux partenaires du projet (IFREMER, BRGM, Ministère chargé de l'Écologie, UNPG).Copyright Ifremer pour la partie marine, copyright BRGM pour la partie terrestre.</gco:CharacterString>
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Pour tout autre usage, veuillez prendre contact avec l'administrateur du Serveur Sextant (sextant@ifremer.fr).

Toute modification de ces données est soumise à une autorisation préalable. Pour cela veuillez prendre contact avec le Coordinateur du projet Granulats marins.

Références bibliographiques à citer:
- "Cartographie synthétique et analyse des peuplements benthiques - Façade manche-Est et Loire-Gironde. Rapport IFREMER. 2006"
- "Cartographie synthétique et analyse des peuplements benthiques - Façade Bretagne et Sud-Gascogne. Rapport IFREMER. 2012"
- Obligation de citation sur la carte : "Produit numérique "Granulats marins" Ifremer 2013"
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            <gco:CharacterString>Références bibliographiques:
- Etude écologique d'avant-projet sur le site de Flamanville, CNEXO, 1976
- Peuplements benthiques du golfe Normano-Breton, Retière C., 1979
- Peuplements benthiques des substrats meubles de la baie de Saint-Brieuc, Thouzeau G., Hamon D., 1992
- Cartographie des peuplements benthiques du secteur Goëlo, Cabioch L., 1968
- Peuplements benthiques en Manche Occidentale, Cabioch L. 1968
- Carte des peuplements benthiques de la mer d'Iroise, Raffin C., 2003
- Atlas des fonds meubles du plateau continental du Golfe de Gascogne, cartes biosédimentaires, Chassé C., Glémarec M., 1976
- Carte des habitats benthiques du secteur de l'archipel des Glénan, multisource Rebent, 2006
- Etude écologique d'avant-projet sur le site d'Erdeven, Hussenot E., Guillou J., 1977,   
- Cartographie bio-sédimentaire pour la zone côte landaise (côte d'argent), Bouchet J-M., 1979
- Carte des peuplements benthiques de la côte landaise, secteur d'Arcachon, Monbet Y., 1972.  

Pour plus d'informations, se reporter aux rapports disponibles sur le site Granulats Marins https://sextant.ifremer.fr/fr/web/granulats-marins</gco:CharacterString>
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                        <gco:CharacterString>Dans un premier temps, l'inventaire des données de peuplements benthiques a été fait sur chaque zone. 
Les données déjà en typologie EUNIS ont été conservées :
- Atlas des fonds meubles du plateau continental du Golfe de Gascogne, 
- Carte des habitats benthiques du secteur de l'archipel des Glénan, 
- Carte des peuplements benthiques de la mer d'Iroise, 
- Peuplements benthiques en Manche Occidentale,
- Peuplements benthiques du golfe Normano-breton,
- Carte des peuplements benthiques de la côte landaise.

 Certaines autres données sont harmonisées en typologie EUNIS pour cette étude: 
- Etude écologique d'avant-projet sur le site de Flamanville,  
- Peuplements benthiques des substrats maubles de la baie de Saint-Brieuc,
- Etude écologique d'avant-projet sur le site d'Erdeven,
- La Cartographie bio-sédimentaire pour la zone côte landaise (côte d'argent), Bouchet J-M.)). 

Ensuite les données sont combinées dans ArcGIS, et lorsque deux données recouvrent la même zone, la plus ancienne est découpée pour insérer la plus récente. Un indice de fiabilité est attribué à chaque donnée en fonction de son ancienneté et des méthodes utilisées. Un indice de richesse est attribué à chaque peuplement, en fonction de la biomasse, de la richesse spécifique et de l'abondance.</gco:CharacterString>
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