File:Banc de maërl en rade de Brest (Ifremer 00686-79814 - 32445).jpg
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Français : Un banc de maërl est une accumulation d’algues calcaires rouges vivant sur les petits fonds côtiers meubles sur quelques centimètres à plusieurs mètres d’épaisseur. Il constitue un véritable réservoir de biodiversité car sa structure fournit une large gamme de microhabitats ainsi qu’une zone de nurserie et de recrutement pour de nombreuses espèces commercialement exploitées (coquilles Saint-Jacques, pétoncles, huîtres plates, jeunes bars, dorades, seiches…). En Bretagne, plus de 900 espèces d’invertébrés et 150 espèces d’algues ont été recensées vivant sur le maërl. La rade de Brest abrite l’un des bancs les plus étendus d’Europe : il couvre plusieurs dizaines de kilomètres. (Extrait paru dans les pages Nature du Télégramme du 27/04/2016) English: A maërl bed is an accumulation of red calcareous algae living on soft coastal shallows, a few centimetres to several metres thick. It constitutes a real reservoir of biodiversity because its structure provides a wide range of microhabitats as well as a nursery and recruitment area for many commercially exploited species (scallops, flat oysters, young sea bass, sea bream, cuttlefish, etc.). In Brittany, more than 900 species of invertebrates and 150 species of algae have been recorded living on maërl. Brest harbour is home to one of the most extensive beds in Europe: it covers several dozen kilometres. (Extract published in the Nature pages of Le Télégramme on 04/27/2016) |
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| Date | 25 March 2021 (upload date) | |||||||||
| Source | Banc de maërl en rade de Brest | |||||||||
| Author | Olivier Dugornay | |||||||||
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| Keywords | Coastal species; Macroalgae | |||||||||
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