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Registros recuperados: 28
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Etude dynamique d'un écosystème perturbé par des rejets polluants - Impact des activités humaines sur les peuplements macrobenthiques de la rade de Brest ArchiMer
Guillou, Monique; Hily, Christian.
Le présent travail est la troisième partie de l'étude entreprise en Rade de BREST sur l'impact des activités humaines sur les peuplements macrobenthiques des fonds meubles. - La première partie a recensé les fonds soumis aux perturbations et le type de dégradation provoqué par les activités humaines. - Dans la seconde partie, nous avons étudié les différents aspects présentés par un peuplement de vases sableuses sur un gradient de matière organique depuis la source de la pollution jusqu'aux fonds propres. Nous avons pu définir une échelle écologique de la pollution en la replaçant dans un contexte plus général. - La troisième partie mettra en évidence l'importance qualitative et quantitative des variations temporelles dans ces peuplements stressés, le...
Tipo: Text
Ano: 1980 URL: http://archimer.ifremer.fr/doc/00101/21229/18846.pdf
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Habitats particuliers de l’infralittoral. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM. ArchiMer
Hily, Christian; Kerninon, Fanny.
Tipo: Text Palavras-chave: Golfe de Gascogne; Habitats particuliers; Infralittoral; Herbiers; Zostère; Maërl; Modioles; Huîtres plates; Vers polychètes.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00329/44021/43593.pdf
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Impact des activités humaines sur les peuplements macrobenthiques des fonds meubles de la rade de Brest ArchiMer
Guillou, Monique; Hily, Christian.
La précédente étude a permis de cerner l'ampleur et le type de dégradation provoqués par les contraintes anthropiques en Rade de Brest. Le présent travail a permis de définir l'impact de la pollution sur le peuplement installé sur ces zones précédemment reconnues. Les phénomènes étudiés sont provoqués par l'enrichissement en matière organique, des sédiments et de l'interface eau-sédiment. Cet excès de matière organique bénéfique à faible concentration est néfaste ensuite. Nous avons défini les différents stades de la dégradation du milieu et établi le parallèle entre la Rade de Brest et d'autres milieux benthiques pollués dans le monde. Nous avons pu montrer les réactions spécifiques à ces stress, mais aussi les modifications des structures même d'un...
Tipo: Text
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00101/21228/18845.pdf
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The concept of population in clonal organisms: mosaics of temporally colonized patches are forming highly diverse meadows of Zostera marina in Brittany ArchiMer
Becheler, Ronan; Diekmann, O.; Hily, Christian; Moalic, Yann; Arnaud-haond, S..
Seagrasses structure some of the world's key coastal ecosystems presently in decline due to human activities and global change. The ability to cope with environmental changes and the possibilities for shifts in distribution range depend largely on their evolvability and dispersal potential. As large-scale data usually show strong genetic structure for seagrasses, finer-grained work is needed to understand the local processes of dispersal, recruitment and colonization that could explain the apparent lack of exchange across large distances. We aimed to assess the fine-grained genetic structure of one of the most important and widely distributed seagrasses, Zostera marina, from seven meadows in Brittany, France. Both classic population genetics and network...
Tipo: Text Palavras-chave: Clonality; Dispersal; Ecotype; Network analysis; Population; Zostera marina.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00006/11690/8499.pdf
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Selecting ecological indicators to compare maintenance costs related to the compensation of damaged ecosystem services ArchiMer
Vaissiere, Anne-charlotte; Levrel, Harold; Hily, Christian; Le Guyader, Damien.
The aim of this paper is to compare different maintenance costs of ecosystem service arising from a hypothetical case of environmental damage in order to help to understand how the different ecosystem services are considered in decision making processes. Compensatory measures are aimed precisely at maintaining the level of supply of ecosystem services. According to the literature, compensatory measures like restoration are usually applied to specific ecosystem services. We used the Millennium Ecosystem Assessment (MEA) categories of ecosystem service. For each MEA category, several ecological indicators are selected, and the cost of the compensatory measures required to fulfill the goal of no net loss is assessed using the Habitat Equivalency Analysis...
Tipo: Text Palavras-chave: Ecosystem services; Maintenance costs; Compensatory measures; HEA; MEA; No net loss.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00134/24552/22997.pdf
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Lower trophic levels and detrital biomass control the Bay of Biscay continental shelf food web: Implications for ecosystem management ArchiMer
Lassalle, G.; Lobry, J.; Le Loc'H, F.; Bustamante, Paco; Certain, Gregoire; Delmas, Daniel; Dupuy, C.; Hily, Christian; Labry, Claire; Le Pape, O.; Marquis, Elise; Petitgas, Pierre; Pusineri, Claire; Ridoux, Vincent; Spitz, J.; Niquil, Nathalie.
The Bay of Biscay (North-East Atlantic) has long been subjected to intense direct and indirect human activities that lead to the excessive degradation and sometimes overexploitation of natural resources. Fisheries management is gradually moving away from single-species assessments to more holistic, multi-species approaches that better respond to the reality of ecosystem processes. Quantitative modelling methods such as Ecopath with Ecosim can be useful tools for planning, implementing and evaluating ecosystem-based fisheries management strategies. The aim of this study was therefore to model the energy fluxes within the food web of this highly pressured ecosystem and to extract practical information required in the diagnosis of ecosystem state/health. A...
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00057/16851/14329.pdf
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Fishing effects on diversity, size and community structure of the benthic invertebrate and fish megafauna on the Bay of Biscay coast of France ArchiMer
Blanchard, Fabian; Le Loc'H, Francois; Hily, Christian; Boucher, Jean.
Within the framework of the 'dynamic equilibrium model', we tested the hypothesis that fishing causes major disturbance to benthic communities on deeper bottoms of the continental shelf. Benthic megafauna on the Bay of Biscay coast of France was sampled on fishing grounds subject to various conditions of exploitation. Samples were taken at around 100 m depth to avoid strong natural disturbances. Species diversity and the largest body mass class of invertebrates were smaller in strongly exploited areas than in moderately exploited ones. Biomass size spectra in strongly exploited areas were characterised by a comparatively large biomass of small invertebrates, hence the K-dominance curve of abundance was either above the biomass curve, or the curves...
Tipo: Text Palavras-chave: Benthic communities; Community dynamics; Disturbance; Diversity; Size spectrum.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/00000/10896/7578.pdf
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Habitats particuliers du médiolittoral. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM. ArchiMer
Hily, Christian; Kerninon, Fanny.
Tipo: Text Palavras-chave: Manche; Mer du Nord; Habitats particuliers; Médiolittoral; Bancs intertidaux; Moule commune; Herbiers; Zostère naine; Récifs; Hermelles.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00327/43836/43410.pdf
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Dynamique successionnelle des peuplements de fonds meubles au large de la Bretagne ArchiMer
Hily, Christian; Glemarec, M.
Tipo: Text
Ano: 1990 URL: http://archimer.ifremer.fr/doc/00103/21385/18985.pdf
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Habitats particuliers de l’infralittoral. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM. ArchiMer
Hily, Christian; Kerninon, Fanny.
Tipo: Text Palavras-chave: Manche; Mer du Nord; Habitats particuliers; Infralittoral; Herbiers; Zostère; Maërl; Modioles; Huîtres plates; Vers polychètes.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00327/43839/43413.pdf
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Etude de la connectivité potentielle en rade de Brest : application au cas de l'huître plate, Ostrea edulis ArchiMer
Bernard, Ismael; Duchene, Julie; Hily, Christian; Lazure, Pascal; Pouvreau, Stephane; Boudry, Pierre.
En complément du rapport final (Anonyme (2014). PERLE. Programme d'expérimentation et de recherche sur l'huître plate Ostrea edulis. Rapport final de l'ensemble du projet 2011-2014. http://archimer.ifremer.fr/doc/00248/35932/), ce rapport présente l'étude de la phase de dispersion des larves en rade de Brest et analyse le lien entre la quantité de larves émises et la quantité de larves captées. Ce lien, qui possède une forte composante spatiale, est appelé connectivité. Il est sous l’influence de la dispersion et de la survie des larves mais seule la dispersion larvaire, avec différents forçages biophysiques du milieu, a été considérée ici. Les effets de la localisation des zones d’émission et de captage, du comportement des larves, du vent ou de la durée...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00251/36233/34793.pdf
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Biocénoses des fonds durs du médiolittoral. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM. ArchiMer
Ar Gall, Erwan; Hily, Christian; Grall, Jacques; Le Duff, Michel; Redon, Christophe; Kerninon, Fanny.
Tipo: Text Palavras-chave: Golfe de Gascogne; Biocénoses; Fonds durs; Médiolittoral.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00329/44017/43589.pdf
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Liste des espèces marines introduites dans les eaux bretonnes et des espèces introduites envahissantes des eaux périphériques ArchiMer
Blanchard, Michel; Goulletquer, Philippe; Hamon, Dominique; Le Mao, Patrick; Nezan, Elizabeth; Gentil, Franck; Simon, Nathalie; Viard, Frédérique; Ar Gall, Erwan; Grall, Jacques; Hily, Christian; Le Duff, Michel; Stiger-pouvreau, Valérie; Acou, Anthony; Derrien-courtel, Sandrine; Feunteun, Eric; D'Hondt, Jean-loup; Canard, Alain; Ysnel, Frédéric; Perrin, Bertrand.
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00026/13737/10865.pdf
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Biocénoses des fonds durs du médiolittoral. Sous-région marine Mers celtiques. Evaluation initiale DCSMM. ArchiMer
Ar Gall, Erwan; Hily, Christian; Grall, Jacques; Le Duff, Michel; Redon, Christophe; Kerninon, Fanny.
Tipo: Text Palavras-chave: Mers celtiques; Biocénoses; Fonds durs; Médiolittoral.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00328/43938/43511.pdf
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Habitats particuliers du médiolittoral. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM. ArchiMer
Hily, Christian; Kerninon, Fanny.
Tipo: Text Palavras-chave: Golfe de Gascogne; Habitats particuliers; Bancs intertidaux; Moule commune; Herbiers; Zostère naine; Récifs; Hermelles.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00329/44018/43590.pdf
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Variablility of stable isotope signatures (delta C-13 and delta N-15) in two spider crab populations (Maja brachydactyla) in Western Europe ArchiMer
Bodin, Nathalie; Le Loch, Francois; Hily, Christian; Caisey, Xavier; Latrouite, Daniel; Le Guellec, Anne-marie.
The ontogenic variations of nitrogen and carbon stable isotopic signatures (delta N-15 and delta C-13) were investigated in two spider crab (Maja brachydactyla) populations inhabiting in different biotopes of Western Europe. The Iroise Sea population is localized in Western Brittany and characterized by a seasonal migration occurring on a large bathymetric and habitat gradient while the Seine Bay population, in the Eastern English Channel, remains in a more homogeneous environment during its migration. In the Iroise Sea population, delta C-13 Values increased significantly both with body size and age, revealing a shift towards "benthic-component" prey with spider crab growth. On the contrary, neither body size nor ageing gave rise to a significant trophic...
Tipo: Text Palavras-chave: Migration; Marine decapod crustaceans; Growth; Feeding; Carbon and nitrogen stable isotopes.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2535.pdf
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Angiospermes des côtes françaises Manche-Atlantique. Propositions pour un indicateur DCE et premières estimations de la qualité ArchiMer
Auby, Isabelle; Oger-jeanneret, Helene; Sauriau, Pierre-guy; Hily, Christian; Barille, Laurent.
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00032/14358/11646.pdf
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Habitats particuliers du médiolittoral. Sous-région marine Mers celtiques. Evaluation initiale DCSMM. ArchiMer
Hily, Christian; Kerninon, Fanny.
Tipo: Text Palavras-chave: Mers celtiques; Habitats particuliers; Bancs intertidaux; Moule commune; Herbiers; Zostère naine; Récifs; Hermelles; Médiolittaral.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00328/43939/43512.pdf
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Habitats particuliers de l’infralittoral. Sous-région marine Mers celtiques. Evaluation initiale DCSMM. ArchiMer
Hily, Christian; Kerninon, Fanny.
Tipo: Text Palavras-chave: Mers celtiques; Habitats particuliers; Infralittoral; Herbiers; Zostère; Maërl; Modioles; Huîtres plates; Vers polychètes.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00328/43942/43515.pdf
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Protocoles de suivi stationnel des herbiers à zostères pour la Directive Cadre sur l’Eau (DCE) Zostera marina - Zostera noltei. Version 2 ArchiMer
Auby, Isabelle; Sauriau, Pierre-guy; Oger-jeanneret, Helene; Hily, Christian; Dalloyau, Sebastien; Rollet, Claire; Trut, Gilles; Fortune, Mireille; Plus, Martin; Rigouin, Loic.
Tipo: Text
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00186/29685/28059.pdf
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