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Feature class depicting broadscale habitat features at The Padstow Bay and Surrounds MCZ. The map is a result of an integrated analysis of existing MBES full coverage of bathymetry and partial coverage of backscatter data from the Civil Hydrography Programme (CHP) and dedicated ground-truthing survey data, collected in 2013. Habitat classes observed at each ground-truthing station were used to inform a semi-automated process of map production using object-based image analysis (OBIA). The map shows the seabed at the site to be characterised largely by outcropping bedrock (‘A3.2 Moderate energy infralittoral rock’ and ‘A4.2 Moderate energy circalittoral rock’), with deposits of ‘A5.1 Subtidal coarse sediment’ in valleys and crevasses in the rock and flat areas of ‘A5.2 Subtidal sand ‘, mainly closer to shore.
Updated habitat map resulting from an integrated analysis of the 2012 dedicated survey data for Beachy Head East recommended Marine Conservation Zone (rMCZ).
Feature class depicting broadscale habitat features at the Mid St George’s Channel rMCZ. The map is a result of an integrated analysis of newly acquired and previously available acoustic data together with ground-truthing data collected by a dedicated survey of the sitein 2013. Habitat classes observed at each ground-truthing station were used to inform a semi-automated process of map production using object-based image analysis (OBIA). The map shows the seabed at the site to be characterised largely by ‘A5.1 Subtidal coarse sediment’ and ‘A5.4 Subtidal mixed sediments’, which are mapped together as a complex due to difficulty in separating the two from the underlying acoustic data. Smaller patches of ‘A5.2 Subtidal sand’ and ‘A4.2 Moderate energy circalittoral rock’ are also found within the site. A new habitat map for the Mid St Georges Channel Marine recommended Marine Conservation Zone (rMCZ) was produced by analysing and interpreting newly acquired and previously available acoustic data together with ground-truthing data collected by a dedicated survey of the site. Full coverage multibeam echosounder (MBES) data covering 70% of the Mid St George’s Channel rMCZ was collected in 2012 by Osiris Projects. An additional block of full coverage MBES data was collected by RV Cefas Endeavour on CEND05/13, adding a further 5% area coverage of the site. The remaining 25% of the rMCZ has partial coverage (31%) MBES data collected under the Mid Irish Sea Project. More detail on the acoustic data used, and references to the aquisitieon reports can be found in the Mid St Georges Channel Marine rMCZ Post-Survey Site Report (Defra Contract Reference: MB0129; Report Number 29) Ground-truth sampling for the site was planned using a standard MCZ ground-truthing sampling grid, applied to different habitat types identified from the processed bathymetry and backscatter layers. Station positions were then modified to target features of interest, in particular suspected reef features. The survey was carried out between 1-6th May 2013 on the RV CEFAS Endeavour cruise CEND0513. Ground truth samples were collected from 130 stations. Benthic grab samples were recovered at 115 stations, video transects at 71stations and short (2 minute) deployments of the drop camera were carried out at a further 49 grab stations. Station metadata are presented in Appendix 1 of the Mid St George’s Channel rMCZ Post-Survey Site Report (Defra Contract Reference: MB0129; Report Number 29) and further detail on ground-truth sample collection can be found in the Site Report and the Mid St George’s Channel rMCZ Survey Report. The new habitat map was produced via a combination of object-based image analysis (OBIA) of the acoustic data, implemented in the software package eCognition® v8.7.2, and expert judgement aided by statistical analysis, linking the ground truth observations to the acoustic and topographic properties. Full methodology for production of the broadscale habitat layer, with appropriate references for methods used, can be found in the Mid St George’s Channel rMCZ Post-Survey Site Report.
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).