Lithothamnion corallioides Crouan et Crouan (Rhodophyta, Corallinales) is the main constituent of the maerl beds of the Bay of Brest (Atlantic coast of western Brittany) . Its growth rate was measured monthly in situ during one year . Growth rates were obtained by an adaptation of the buoyant weight technique . The highest daily growth rate was observed in July and reached 0 .26 % d -' (S .D. = 0 .06), when expressed as the increase of calcium carbonate weight . The average daily growth rate was 0 .12% d -' (S .D. = 0 .04) for a period of 275 days (summer and autumn 1988, winter 1989) . Using this preliminary data, the calcium carbonate accretion rate can be estimated provisionally : 876 gm-2 year -', a rate much lower than that of tropical reef coralline algae, but higher than that of Lithophyllum incrustans, the well known temperate European reef-builder . N 1 1 D J
L'interprétation de données de sismique réflexion acquises dans la baie de Douarnenez (Finistère) au cours de la campagne Canadou 2000 a permis la restitution de la morphologie du substratum et l'étude des remplissages sédimentaires. Le toit du substratum de la baie de Douarnenez révèle ainsi un réseau de paléovallées, entaillé lors de périodes d'émersion dans un soubassement sédimentaire briovérien et paléozoïque. Au cours des derniers interglaciaires, les invasions marines répétées déterminent la répartition des formations sédimentaires du domaine côtier, déposées successivement en conditions continentales, fluvio-estuariennes, puis marines. Pour citer cet article : G.
Norois Environnement, aménagement, société 196 | 2005 Géographie du littoral : approche géomatique Apport de l'approche systémique et pluridisciplinaire dans l'étude du domaine littoral et marin de la Seine-Maritime (France) Contribution of systemic and pluridisciplinary approach for the coastal and marine area of the Seine-Maritime (France) Stéphane Costa, Françoise Gourmelon, Claude Augris, Philippe Clabaut et Bernard Latteux Édition électronique URL : http://norois.revues.org/534
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.