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| Registros recuperados: 36 | |
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| De Oliveira, Eric; Populus, Jacques; Guillaumont, Brigitte. |
| The aim of this study is to model the seaweed species distribution with respect to environmental parameters. We focused on fixed species of algae, such as fucoids. Firstly, we identified environmental parameters, such as substratum nature, immersion time, exposure, etc., which determine the seaweed distribution. Secondly, we used field sampling to compute the distribution laws for seaweed according to the environmental parameters selected. Thirdly, we used the distribution laws and the environmental parameters to perform predictive mapping of seaweed belts with a fuzzy logic method. Seaweed presence is directly dependent on the nature of the substratum. In the intertidal domain we used an alternative, because seaweed beds can be observed directly. We... |
| Tipo: Text |
Palavras-chave: Fussy logic; Mapping; Bentic habitats; Intertidal seaweed. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2279.pdf |
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| Talidec, Catherine; Berthou, Patrick; Rivoalen, Jean-jacques; Bermell, Sylvain; Guillaumont, Brigitte. |
| The study undertaken during the 1994-1998 planning contract on the Breton fishing fleet made it possible to underscore the size of the economic activity in regional territorial waters: More than 85% of the ships work there. This space, which is a matter of national sovereignty, is mainly managed at the regional level. To clarify the paths that may need to be taken, it seemed opportune to us to identify spatially the coastal fisheries, as well as the main current problems of planning. The fishing zones were mapped. This work required special surveys of the local fishing committees, because it could not be done from existing fishing statistics. The surveys allowed us to approach the localization of the various trades' fishing zones on maps at 1/50,000, as... |
| Tipo: Text |
Palavras-chave: Fishing regulation; Territorial waters; Cartography; Survey; Fleet; Fisheries; Brittany; Réglementation; Enquêtes; Zones de pêche; Cartographie; Gisements naturels; Eaux territoriales; Flotte; Pêche bretonne; CPER. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/rapport-2256.pdf |
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| Van Den Beld, Inge; Bourillet, Jean-francois; Arnaud-haond, Sophie; De Chambure, Laurent; Davies, Jaime S; Guillaumont, Brigitte; Olu, Karine; Menot, Lenaick. |
| The topographical and hydrological complexity of submarine canyons, coupled with high substratum heterogeneity, make them ideal environments for cold-water coral (CWC) habitats. These habitats, including reefs, are thought to provide important functions for many organisms. The canyons incising the continental slope of the Bay of Biscay have distinct morphological differences from the north to the south. CWCs have been reported from this basin in the late 19th century; however, little is known about their present-day distribution, diversity and environmental drivers in the canyons. In this study, the characteristics and distribution of CWC habitats in the submarine canyons of the Bay of Biscay are investigated. Twenty-four canyons and three locations... |
| Tipo: Text |
Palavras-chave: Cold-water corals; Habitats; Submarine canyons; Bay of Biscay; NE Atlantic; ROV; Towed camera; Distribution. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00382/49343/49733.pdf |
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| Guillaumont, Brigitte; Hamon, Dominique; D'Ozouville, Laurent. |
| Un des aspects de l'étude écologique d'avant-projet du site marémoteur du golfe normano-breton confié par EDF au CNEXO a consisté à identifier les peuplements benthiques de la zone intertidale de la baie du Mont-St-Michel. L'idée directrice a été de définir les différentes composantes faunistiques de la baie en fonction~ notamment la nature du substrat et du niveau bathymétrique. L'analyse des données bibliographiques a fait rapidement apparaître le manque de données biologiques dans la partie orientale de la baie, aussi l'étude a-t-elle été centrée sur ce secteur. |
| Tipo: Text |
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| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/00004/11522/8103.pdf |
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| Populus, Jacques; Laurentin, Astrid; Rollet, Claire; Vasquez, Mickael; Guillaumont, Brigitte; Bonnot-courtois, Chantal. |
| This paper addresses the need for a finer description of coastal zone relief that is currently of interest for benthic habitat mapping. For example, the distribution of seaweed species in the tidal zone will mostly depend on the terrain's hypsometric level, slope and orientation. These parameters can be used in predictive distribution models, or more simply merged with 2.5/3D imagery to enhance interpretation. Since the required accuracy is of the order of 20-30 cm, two remote sensing techniques, lidar and photogrammetry, were examined and conditions for their application were assessed. Lidar surveys have been shown to provide such accuracy in all instances, whatever the substratum and vegetal cover type, as well as with the slope values currently... |
| Tipo: Text |
Palavras-chave: Laser scanning; Benthos mapping; Photogrammetry; Coastal zone topography. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-2278.pdf |
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| Caillaud, L.; Guillaumont, Brigitte; Manaud, Francois. |
| Les objectifs de cette étude concernent l'apport potentiel de l'imagerie satellitaire SPOT sur les marais maritimes et plus particulièrement ceux situés dans la partie centrale de la façade atlantique française, notamment au travers de l'approche multidate. Deux thèmes seront traités séparément : - Le premier thème, de loin le plus important dans ce secteur, concerne les marais endigués gérés en eau de mer. Son objectif est la détermination du taux d'occupation (zones exploitées ou abandonnées) et du type d'activité exercée. - Le second concerne quant à lui la discrimination des couverts végétaux dans les marais naturels. |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00446/55728/57380.pdf |
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| Bajjouk, Touria; Guillaumont, Brigitte; Michez, Noemie; Thouin, Benoît; Croguennec, Chantal; Populus, Jacques; Louvel-glaser, Justine; Gaudillat, Vincent; Chevalier, Claire; Tourolle, Julie; Hamon, Dominique. |
| Ce document est une traduction française que l’on espère transcrire au mieux les descriptions d’habitats de la classification EUNIS. Il vient compléter la traduction en français des habitats terrestres et d’eau douce réalisée par le MNHN‐SPN (Louvel et al., 2013). Il a pour objectif de faciliter l’appropriation de cette typologie par les acteurs concernés (scientifiques, gestionnaires ou bureaux d’études) et favoriser les échanges de connaissance sur la biodiversité des habitats benthiques en cohérence avec ce standard. Il s’agit dans ce document du dictionnaire de la typologie EUNIS dans sa version 2007, revue en 2012 pour des modifications des codes de la classification paléarctique et ceux de la classification des habitats marins de la Grande Bretagne.... |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00271/38222/36382.pdf |
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| Allain, Serge; Guillaumont, Brigitte; Le Visage, Christophe; Loubersac, Lionel; Populus, Jacques. |
| Devant la demande croissante des aménageurs du territoire, des scientifiques ou des usagers travaillant en milieu littoral, le SHOM et l'IFREMER ont mis en commun au sein d'un groupe de travail les moyens qu'ils consacrent à l'identification et la définition des « données géographiques de référence » en domaine littoral. Ce travail d'analyse est conduit à travers une démarche pragmatique croisée entre une approche par thème et une approche par application. Une grille de lecture a été construite, prenant en compte un certain nombre de paramètres tels que vocabulaire, données existantes, intérêt applicatif, cohérence et forme des produits. Une liste des données de référence issue de ces analyses a été établie. Ces données sont hiérarchisées selon deux... |
| Tipo: Text |
Palavras-chave: Données de référence numériques; Base de données; Domaine littoral; Applications; SIG. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00423/53406/54282.pdf |
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| Meleder Tard, Vona; Populus, Jacques; Guillaumont, Brigitte; Perrot, Thierry; Mouquet, Pascal. |
| Predictive modelling to map subtidal communities is an alternative to "traditional" methods, such as direct sampling, remote sensing and acoustic survey, which are neither time- nor cost-effective for vast expanses. The principle of this modelling is the use of a combination of environmental key parameters to produce rules to understand species distribution and hence generate predictive maps. This study focuses on subtidal kelp forests (KF) on the coast of Brittany, France. The most significant key parameters to predict KF frequency are (1) the nature of the substrate, (2) depth, (3) water transparency, (4) water surface temperature and (5) hydrodynamics associated with the flexibility of algae in a flow. All these parameters are integrated in a spatial... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00006/11758/9273.pdf |
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| Auffret, J.p.; Berne, Serge; Gresselin, F; Guillaumont, Brigitte; Walker, P. |
| The study of the sublittoral bottoms near the Flamanville site has been tackled in the pilot studies (1976) and project studies (1977 - 1979) in the aim of assessing benthic populations. Given the coarse nature of the sea bed, the identification (figure 1) was carried out using a towed tool susceptible of sampling in a semi-quantitative way on a wide variety of substrates: a Rallier du Baty drag. Apart from the rocky bottoms lying right next to the coast, on which no information could be collected, two types of populations have been identified. |
| Tipo: Text |
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| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/rapport-6464.pdf |
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| Guillaumont, Brigitte. |
| Un-quantified observations seem to indicate a decrease in brown algae blanket in inter-tidal zones along several coastlines. The goal of this contract, which is CEVA's contribution to REBENT- Bretagne_ year 2003, regards the quantitative evaluation and long term follow up of fucales in inter-tidal zones. The work that was accomplished during a previous contract with CEVA had allowed defining a SPOT image processing protocol used to evaluate and follow up, in time, global vegetal blankets. A methodology form had been written up and two SPOT images from the Trégor region had been processed as a vegetal blanket. Results analysis showed how being able to isolate fucales, and for that matter, its various species, was necessary in order to create more pertinent... |
| Tipo: Text |
Palavras-chave: Fucales; Staging; Intertidal; SPOT; Covers algales; Fucales; Etagement; Intertidal; SPOT; Couvertures algales. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/rapport-1657.pdf |
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| Guillaumont, Brigitte. |
| Since the end of the 1990s, the need for more knowledge on and monitoring of marine biodiversity has appreciably increased. The expectations are driven by the necessity to better evaluate not only the impact of pollution and anthropic activities but also climate changes. It also has to do with contributing to natural environment management and protection measures. These needs range from international and European levels (International symposiums, European guidelines,...) to national, regional, if not local, entities (Natural areas of ecological interest, Marine parks, management schemes,...). Benthic species (related to the sea bed), which integrate local ecological characteristics and are subjected to fluctuations which are either natural or generated by... |
| Tipo: Text |
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| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/acte-6339.pdf |
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| Registros recuperados: 36 | |
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