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Habitats

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  • Reporting under Article 17 of the EU Habitats Directive requires member states to report on progress towards achieving favourable conservation status for habitats and species of Community Importance. The assessment of conservation status does not only relate to that component of the habitat area or species population to be found in Special Areas of Conservation, but to the totality of the habitats and species throughout the United Kingdom. The results of NRW's feature monitoring work and other evidence collected (survey) or collated (other data sources) on reef feature extent feed in to the process of mapping and reporting under Article 17. JNCC coordinate and provide UK-level feature reports under Article 17; England, Wales, Northern Ireland and Scotland submit country-level data and information to inform these reports. This dataset only consists of the Welsh component of the Article 17 reef mapping.

  • Updated habitat map resulting from an integrated analysis of the dedicated 2012 survey data (CEND3/12b) for South East of Falmouth rMCZ. A new habitat map for the site was produced by analysing and interpreting the available acoustic data and the groundtruth data collected by the dedicated survey of this site. The process is a combination of two approaches, auto-classification (image analysis) and expert interpretation, as described below. The routine for auto-classification is flexible and dependent on site-specific data, allowing for application of a bespoke routine to maximise the acoustic data available. ArcGIS was used to perform an initial unsupervised classification on the supplied backscatter image. The single band backscatter mosaic was filtered and smoothed prior to the application of an Iso cluster/maximum likelihood classification routine. For further information, refer to the South-East Falmouth rMCZ Post-survey Site Report vs. 8 (Green, S. & Cooper, R., 2015).

  • Updated habitat map resulting from an integrated analysis of the dedicated 2012 survey (CEND8/12a) data for Markham's Triangle rMCZ. Map created via unsupervised classification and expert interpretation. A new habitat map for the site was produced by analysing and interpreting the available acoustic data and the groundtruth data collected by the dedicated survey of this site. The process is a combination of two approaches, auto-classification (image analysis) and expert interpretation, as described below. The routine for auto-classification is flexible and dependent on site-specific data, allowing for application of a bespoke routine to maximise the acoustic data available. ArcGIS was used to perform an initial unsupervised classification on the supplied backscatter image. The single band backscatter mosaic was filtered and smoothed prior to the application of an Iso cluster/maximum likelihood classification routine. For further information, refer to: Green, S. & Cooper, R. (2013), Markham’s Triangle rMCZ Post-survey Site Report.

  • Broadscale habitat (EUNIS level 3) for Western Channel recommended Marine Conservation Zone (rMCZ), based on acoustic data and 58 PSA samples collected during the survey on board research vessel Cefas Endeavour, cruise ID CEND0312, between 20/02/2012 and 25/02/2012.

  • Updated habitat map resulting from integrated analysis of the CHP acoustic data and the 2012 dedicated ground truth survey data for North East of Farnes Deep (formerly known as Rock Unique) rMCZ. Classification system details: EUNIS habitats and a separate FOCI layer. Survey technique details: 0.1m2 mini Hamon grab; Camera sledge; Existing multibeam data used. Associated datasets: GB001127

  • Updated broadscale habitat map for East of Celtic Deep recommended Marine Conservation Zone (rMCZ), resulting from an analysis of the dedicated survey data. The broadscale habitat ‘A5.2 Subtidal sand’ was the most widespread habitat, occupying roughly two-thirds of the rMCZ site. The sand is shaped into subaqueous dunes in the east and the northwest of the site, but occurs as flat seabed in the central area. ‘A5.4 Subtidal mixed sediments’ are found in the east, in the troughs between dunes and on flat areas of seabed. ‘A5.3 Subtidal mud’ is limited to water depths >90 m in the west of the site. Classification system details: EUNIS habitats and a separate FOCI layer. Survey technique details: Multibeam: Kongsberg EM2040; 0.1m2 mini Hamon grab; Camera sledge.

  • Broadscale habitat (EUNIS level 3) for Offshore Brighton recommended Marine Conservation Zone (rMCZ). Seabed texture polygons mapped using expert interpretation of acoustic data (MBES bathymetry and backscatter) and groundtruthing data from PSA analysis and image (stills and video) classification. Using data collected during cruise CEND0812 on the RV Cefas Endeavour (29/04/12 to 14/06/12) and previous surveys. A new habitat map for the site was produced by analysing and interpreting the available acoustic data and the ground truth data collected by the dedicated survey of the Offshore Brighton rMCZ, in addition to existing modelled bathymetry (Astrium,2011). The process involves geological review and expert judgement to interpret the sediment textures present. To map substrata type across the rMCZ, we assessemed the sea bed and generated line work based on MBES, backscatter and derivatives (rugosity, slope) in conjunction with ground truth information (PSA, video and stills) in order to assign BSH classsifications. For further information, refer to the Offshore Brighton rMCZ Post-survey Site Report (Dove and Green, 2015).

  • Updated habitat map resulting from an intergrated analysis of the EGS 2012 acoustic data and the Cefas Survey of 2012 (Fulmar rMCZ groundtruthing survey onboard the RV Cefas Endeavour between 6 and 10 May 2012, Cruise ID: CEND 8/12). Sediment types at each ground-truthing station were used to inform a semi-automated process of map production using object-based image analysis (OBIA). The Majority of the seabed was classified as "A5.3 Subtidal mud" with smaller areas of "A5.4 Subtidal mixed sediments"

  • A broadscale habitat feature class was created to illustrate predicted extent of broadscale habitats present at Farnes East rMCZ. These broadscale habitats include 'Moderate energy circalittoral rock', 'Subtidal coarse sediment', 'Subtidal sand', 'Subtidal mud' and 'Subtidal mixed sediments' as determined from particle size analysis of sediment samples and descriptive analysis of still images from underwater camera data. The assigned classes at each ground-truth stationwere used to inform the semi-automated process of map production using object-based image analysis (OBIA)in combination with regression kriging. Groundtruthing data collected during 2012 on the RV Cefas Endeavour (surveyID CEND0412). Classification system details: EUNIS habitats and a separate FOCI layer. Survey technique details: 0.1m2 mini Hamon grab; Camera sledge; multibeam data colected by EGS under contract in 2012.

  • Updated habitat map resulting from an integrated analysis of the 2012 (CEND 3/12a) and 2013 (CEND 5/13) dedicated survey data for East of Haig Fras recommended Marine Conservation Zone (rMCZ). It shows the seabed at the site to be a heterogenous fine scale mosaic of sand, coarse and mixed sediments, with mud habitat in deeper areas. The two broadscale habitats ‘A5.1 Subtidal coarse sediment’ and ‘A5.4 Mixed sediments’ are presented as a complex ‘A5.1/A5.4 Subtidal coarse/mixed sediments’. They show no differentiation in their acoustic or topographical properties that would allow them to be mapped separately. The ‘A4 Circalittoral rock’ habitat is present in scattered small patches. Created with Object Based Image Analysis (OBIA) on acoustic data and groundtruthed samples. Acoustic data gathered by Gardline under tender, groundtruthing gathered by Cefas on cruises CEND 3/12a and CEND 5/13.