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  • La carte de nature des fonds du site Natura 2000 en mer des Roches de Penmarc'h a été réalisée dans le cadre du programme Interreg MeshAtlantic et constitue la première étape de l'élaboration de la carte des habitats subtidaux du site. Ce jeu de données provient de l'interprétation et l'interpolation des acquisitions intertidales et subtidales ayant eu lieu sur le site de Penmarc'h entre 2011 et 2012. Ont participé à l'élaboration de ce produit : - Stevenn Lamarche (coord.), (Ifremer - Applications Géomatiques) - Jacques Populus (Ifremer - Applications Géomatiques) - Anthony Doré (MNHN SPN - Station de Biologie Marine de Concarneau) - Fabrice Pluquet (HOCER) - Anouar Hamdi (Géomaticien) - Eliot Besson (Stagiaire)

  • Cette carte des peuplements benthiques subtidaux du secteur Trégor-Goëlo est le résultat du traitement, de l'analyse et de l'agrégation des données des campagnes REBENT 10 et 11 (2006), HALIOTREGOR (2008) et IFR-NEOMYSIS (2011). Deux sources croisées d'acquisition des données ont été employées : un système acoustique embarqué (sondeur multifaisceaux) et remorqué (sonar à balayage latéral), permettant de définir des premières classes de signatures acoustiques, correspondant à des unités morpho-sédimentaires, complétées par des campagnes de prélèvements à la benne (échantillons sédimentaires biologiques) et des profils vidéo.

  • Mapis based on the interpretation of various types of data from a number of surveys carried out between 2011-2012 both in the intertidal and subtidal zones. Additionally the seabed « Carte G » from the French hydrographic survey (SHOM) was used in the interpretation process. In the tidal zone the identification was made by interpreting coastal ortho-photographs from BD Ortho (2005 et 2009) and digitising them on scale 1 : 2000ème with further qualification of the polygons based on ground truth data. For the subtidal zone, several data sources from 2011 were available: bathymetric lidar (with sounding density about 1pt*3m-2), side scan sonar (resolution of about 0.2m), underwater video, sediment and fauna samples collected with grabs and trawls. Addtionnally a single beam sounder was running at all times during the transects, which contributing to improve the depth DTM. In the outer rocky circalittoral zone, side scan sonar corridors were surveyed with a coverage of 30-50% depending on places. In the offshore deep circalittoral zone (known as La Grande vasière) where soft sediment is predominant, side scan sonar coverage was reduced to about 5-10%. In these latter two circalittoral zones, interpolation between sonar corridors was supported by SHOM « Carte G » (approx. scale 1:100000) along with a 100m resolution depth DTM. On rocky seabed, exposure at the seabed was described using kinetic energy from a combination of wave and current hydrodynamic models according to the methods described in: http://doi.org/10.13155/49975. Rocky substrate in intertidal and infralittoral zones was derived from the combined interpretation of both the topographic and bathymetric Lidar DTMs and aerial photographs, where permitted by water transparency. Various representations of the DTMs (slope, hillshade) helped delineate rocky outcrops with good reliability. Biological qualification of the substrate polygons was made through taxonomic analysis of benthos samples collected by MNHN in the framework of the project"Ecological assessment of Natura 2000 site - Roches de Penmarc’h".The final habitat classification was a synthesis of the main habitat classifications, namely: Generic habitats from the Habitat Directive (EUR 27), Elementary habitats from the French Cahiers d’habitats, The Rebent classificationand EUNIS level 4 as much as possible.

  • This layer is a model of the biological zones of the EU's 'Atlantic Area 2007-2013'. It was performed within the framework of MeshAtlantic project (INTERREG ‘Atlantic Area 2007-2013’ program). This layer was modelled with the use of bespoke base layers that were the bathymetry, wave wavelength and the kdpar The biological zones boundaries were defined in the following way. - Infralittoral lower limit: limit at which the percentage of light reaching the seabed is 1%. The percentage of light layer was calculated by intersecting the kdpar and the bathymetry layers. For more details about this calculation see e.g. Vasquez et al. (in press). - Circalittoral lower limit: limit at which the ratio wave wave length over the depth equals 2.53 - Deep circalittoral lower limit: break of slope due to the entrance into the continental slope. This limit was digitalized with the use of the bathymetry layer - Upper slope lower limit: depth 750m - Upper bathyal lower limit: depth 1100m - Mid bathyal lower limit: depth 1800m - Lower bathyal lower limit: break of slope due to the entrance into the abyssal plain. This limit was digitalized with the use of the bathymetry layer Deep biological zones (from upper slope to abyssal) were chosen according to the classification proposed by Howell (2010). For more detail see Vasquez et al. (in press) Howell, K.L., 2010. A benthic classification system to aid in the implementation of marine protected area networks in the deep/high seas of the NE Atlantic. Biological Conservation 143, 1041–1056. Vasquez, M., Mata Chacón, D., Tempera, F., O’Keeffe, E., Galparsoro, I., Sanz Alonso, J. L., Gonçalves, J.M.S., Bentes, L., Amorim, P., Henriques, V., McGrath, F., Monteiro, P., Mendes, B., Freitas, R., Martins, R., Populus, J., In press. Broad-scale mapping of seafloor habitats in the north-east Atlantic using existing environmental data.

  • This map covers both the intertidal zone and subtidal zones of the study sites. It is made from high resolution remote sensing data - both acoustic and optical - from various surveys carried out over the period 2008 to 2013 of various types: (i) multibeam echosounder (MBES), side scan sonar (SSS), RoxAnn acoustic ground discrimination system (AGDS), (ii) ortho-photography (the “Ortholittorale survey” from 2000), (iii) topographic and bathymetric lidar . It was complemented by (i) underwater video,(ii) sediment and biological grab samples, (iii) ground truth data from surveys in the tidal and infralittoral zone using GPS, annotations and photography.The habitat classification was a synthesis of the main habitat classifications, namely:Generic habitats from the Habitat Directive (EUR 27), Elementary habitats from the French Cahiers d’habitats, The Rebent classificationand EUNIS level 4 as much as possible. Map scale is in the range of 1:20000, with local improvements to 1:10000.

  • This map mostly results from the interpolation in gaps between surrounding maps. In places the rugosity derived from bathymetric data (soundings from hydrographic minutes and hydrographic lidar) enabled the interpreter to infer rocky seabed presence. In shallowest places aerial photography was also used to retrieve rocky seabed, distinguished from similar-looking Zostera beds owing to a historic Zostera bed inventory available to the project. The habitat classification was a synthesis of the main habitat classifications, namely: Generic habitats from the Habitat Directive (EUR 27), Elementary habitats from the French Cahiers d’habitats, The Rebent classificationand EUNIS level 4 as much as possible.

  • This layer is a predictive EUNIS seabed habitat map for the Canary Islands. It was performed within the framework of EMODnet Phase 2 Thematic Lot n° 3 (aka EUSeaMap2). It is a preliminary version which will be refined during the course of the project. The layer was created using two pre-processed input datasets: substrate and biological zone. The seabed substrate type layer was a compendium of historical maps (Emodnet phase 2 Geology lot first release + Datasets from Instituto Español de Oceanografía). The biological zones layer, available in this catalog under the title 'Biological zones of the Canary Islands and Madeira archipelago', was modeled thanks to layers of bathymetry and light attenuation. The map follows the EUNIS 2007-11 classification system supplemented by additional categories in deep sea areas (Howell et al., 2010). The map does not include the intertidal zone. The study followed the methodology developped within the EUSeaMap project (EMODnet phase 1). For more details about the methodology see EUSeaMap final report (Cameron and Askew, 2011) or Coltman et al., 2008. For more details about the current map see EUSeaMap2 interim report (EMODnet Thematic Lot n° 3, 2014) Cameron, A., Askew, N. (eds.), 2011. EUSeaMap - Preparatory Action for development and assessment of a European broad-scale seabed habitat map final report. URL: http://jncc.gov.uk/euseamap Coltman, N., Golding, N., Verling, E., 2008. Developing a broadscale predictive EUNIS habitat map for the MESH study area. 16 pp. URL: http://www.searchmesh.net/pdf/MESH%20EUNIS%20model.pdf. EMODnet Thematic Lot n° 3, 2014. EMODnet Phase 2 - Annual (interim) report. Reporting Period: Sept. 2013 to Aug. 2014. URL: http://www.emodnet-seabedhabitats.eu/pdf/20140909_euseamap2_year1_report.pdf Howell, K.L., 2010. A benthic classification system to aid in the implementation of marine protected area networks in the deep/high seas of the NE Atlantic. Biological Conservation 143, 1041–1056.

  • This layer is a model of the biological zones of the Adriatic Sea. It was performed within the framework of EMODnet Phase 2 Thematic Lot n° 3 (aka EUSeaMap2). It is a preliminary version which will be refined during the course of the project. This layer was modelled with the use of base layers that were the seabed substrate type (obtained from EMODnet phase 2 Geology lot, June 2014 release), the bathymetry (EMODnet phase 1 Hydrography lot) and the kdpar (bespoke computed layer) The biological zones boundaries were defined in the following way. - Infralittoral lower limit: limit at which the percentage of light reaching the seabed is 1%. The percentage of light layer was calculated by intersecting the kdpar and the bathymetry layers. For more details about this calculation see e.g. Cameron and Askew (2011). - Circalittoral lower limit: break of slope due to the entrance into the continental slope. This limit was digitalized with the use of the bathymetry layer - Bathyal lower limit: break of slope due to the entrance into the abyssal plain. This limit was digitalized with the use of the bathymetry layer In a western area for which the seabed substrated type is influenced by the Pô river, different rules were used for the definition infralittoral and circalittoral zones. Where the substrate is muddy (i.e. mud or sandy mud) and/or the seabed is deeper than 20 meters then the biological zone was said to be circalittoral. Elsewhere it was defined as infralittoral. For more details about the current layer see EUSeaMap first year report (EMODnet Thematic Lot n° 3, 2014) Cameron, A., Askew, N. (eds.), 2011. EUSeaMap - Preparatory Action for development and assessment of a European broad-scale seabed habitat map final report. URL: http://jncc.gov.uk/euseamap EMODnet Thematic Lot n° 3, 2014. EMODnet Phase 2 - Annual (interim) report. Reporting Period: Sept. 2013 to Aug. 2014. URL: http://www.emodnet-seabedhabitats.eu/pdf/20140909_euseamap2_year1_report.pdf

  • This layer is a predictive EUNIS seabed habitat map for the Adriatic Sea. It was performed within the framework of EMODnet Phase 2 Thematic Lot n° 3 (aka EUSeaMap2). It is a preliminary version which will be refined during the course of the project. The layer was created using two pre-processed input datasets: substrate and biological zone. The seabed substrate type layer was a compendium of historical maps (Emodnet phase 2 Geology lot first release + IBCM map). The biological zones layer, available in this catalog under the title 'Biological zones of the Adriatic Sea', was modeled thanks to layers of bathymetry and light attenuation. The map follows the EUNIS 2007-11 classification system. It does not include the intertidal zone. The study followed the methodology developped within the EUSeaMap project (EMODnet phase 1). For more details about the methodology see EUSeaMap final report (Cameron and Askew, 2011) or Coltman et al., 2008. For more details about the current map see EUSeaMap2 interim report (EMODnet Thematic Lot n° 3, 2014) Cameron, A., Askew, N. (eds.), 2011. EUSeaMap - Preparatory Action for development and assessment of a European broad-scale seabed habitat map final report. URL: http://jncc.gov.uk/euseamap Coltman, N., Golding, N., Verling, E., 2008. Developing a broadscale predictive EUNIS habitat map for the MESH study area. 16 pp. URL: http://www.searchmesh.net/pdf/MESH%20EUNIS%20model.pdf. EMODnet Thematic Lot n° 3, 2014. EMODnet Phase 2 - Annual (interim) report. Reporting Period: Sept. 2013 to Aug. 2014. URL: http://www.emodnet-seabedhabitats.eu/pdf/20140909_euseamap2_year1_report.pdf

  • This subtidal map was made in the framework of the Cartham project from 2009-2012. It incorporates remote sensing data in the form of a few side scan sonar profiles, along with a reasonable amount of sediment and fauna samples. Large gaps within the acoustic coverage were filled by the interpreter using evidence from bathymetric data, before the resulting polygons were labelled according to the biology contained in them. The habitat classification was a synthesis of the main habitat classifications, namely:Generic habitats from the Habitat Directive (EUR 27), elementary habitats from the French Cahiers d’habitats, the Rebent classification and EUNIS level 4 as much as possible.