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Delineation of the OSPAR Regions in the OSPAR maritime area. The delineation does not include a coastline and the polygons overlap with land.
The aim of the survey was to map the seabed environment around North Rona. The survey will form the baseline for future management of the area to determine the scope and nature of any “appropriate assessment”. The survey area encompasses the seabed all around North Rona. In order to record and characterise the habitats around North Rona, Seastar Survey Ltd. undertook an acoustic and a ground-truthing survey (video/still photography survey) in 2009. The aim of the acoustic element of the survey was to identify different backscatter returns and describe as well as delineate the extent of the various seabed habitat types occurring around North Rona. A digital sidescan sonar mosaic, in conjunction with single beam echo sounder derived bathymetry, provided the initial broadview to map the substrata present throughout the survey area as well as allowing the identification of any features of interest. The aim of the ground-truthing element of the survey was to provide a description of the richness and diversity of the habitats on both rocky reef and the softer sediments. The biotope distribution and species composition was developed through interpretation of drop-down video footage and digital still photography, taken after evaluation of the sidescan mosaic. The results of all elements of the survey were used to create a Geographical Information System (GIS) which enabled a high level of processing, interpretation and display of the sidescan sonar mosaic, bathymetry, substrata types, biotopes and the digital photography.
Translated from Anton Dohrn biotope maps showing all Annex I and non-Annex I habitats. Translated to EUNIS by JNCC. Data collected aboard the MV Franklin in July 2009: Acoustics (Multibeam echosounder), Drop camera/towed video (10 sites). The original survey plan (Stewart 2009) for the Anton Dohrn Seamount AoS involved a combination of radial transects on the top of Anton Dohrn and a suite of transects parallel to the flanks of the seamount both at the top of the flank and a level near the base the flank tohighlight the lower level of possible rock or hard substrate. The survey plan was subsequently modified to provide an area of multibeam coverage over two areas on the flanks of the seamount. The areas selected were on the south-eastern flank and the northwestern flank (Figure 5) and included diverse morphological features noted during the SEA 7 2005 survey (Jacobs 2006). The areas would provide a contrast between the south-eastern area primarily subject to ‘southern’ water masses and the north-western area occasionally influenced by ‘colder’ NSDW waters spilling over the Wyville Thomson Ridge. The two case study areas also differ in the height of the cliff surrounding the seamount. In the northwestern area the break in slope is at around 845m below sea level with the cliff descending to the moat at around 2195m depth, the slope levels off below 1700m at the foot of the cliff. The south-eastern area shows a subtle break in slope at around 875m below sea level and a major break in slope at around 1100m below sea level before the cliff descends towards the centre of the moat at around 2300m water depth. The range of morphological features observed on the lower slopes of also differed.
The atlas provides a basic knowledge of the marine and coastal seabed as well as of their main communities and of the Posidonia meadow occurrences. Cartographic datasets are integrated by bibliographic material. The atlas was constructed based on the 1:10,000 regional technical chart (CTR) and this release is an upgrade of the maps provided in the “Atlante degli Habitat Marini della Liguria – Diviacco/Coppo-2006” approved by Liguria Region by D.G.R. #1444 – November 02, 2009. The spatial coverage of the atlas is the coastal belt of all the Liguria region. Data were collected by side scan sonar, ortophoto, aerial photo, R.O.V. and scuba surveys.
Cette carte est la synthèse des cartes de l'atlas de Claude Chassé et Michel Glémarec de l'Université de Bretagne Occidentale, "Atlas du littoral français, atlas des fonds meubles du plateau continental du Golfe de Gascogne, cartes biosédimentaires", publié en 1976 avec le concours du CNEXO. Cet atlas comprend deux types de cartes : cinq cartes biosédimentaires côtières au 1/100000 et une carte plus générale au 1/500000. Ces cartes ont fait l'objet en 2003 d'une numérisation dans le cadre du Réseau de surveillance de la flore et de la faune benthique marine REBENT. Sous forme numérique, ces cartes ont été regroupées en un seul lot de données.