Alternate title

GB001536

Date (Publication)

2018-04-30

Date (Revision)

2018-04-30

Date (Creation)

2018-04-30

Citation identifier

EMODnetSeabedHabitats / GB001536

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Natural England		enquiries@naturalengland.org.uk	Custodian
Defra		open@defra.gsi.gov.uk	Owner

GEMET - INSPIRE themes, version 1.0

• Habitats and biotopes

http://inspire.ec.europa.eu/codelist/ReferenceHabitatTypeSchemeValue

• Eunis

Use limitation

Available under the Open Government License v3.0

Use limitation

geossAttribution

Access constraints

Other restrictions

Other constraints

no limitation

Access constraints

Other restrictions

Spatial representation type

Vector

Denominator

5000

Language

English

Topic category

• Biota
• Oceans

Begin date

2014-01-01

End date

2014-01-31

Reference system identifier

EPSG / WGS 84 (EPSG:4326) / 7.9

Topology level

Geometry only

Distribution format

Name	Version
ESRI Shapefile	1.0

OnLine resource

Protocol	Linkage	Name
OGC:WMS	https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_view_maplibrary/wms?	gb001536
OGC:WFS	https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_open_maplibrary/wfs?	gb001536
WWW:LINK-1.0-http--link	https://files.emodnet-seabedhabitats.eu/data/EMODnetSBHsurvey_GB001536.zip	EMODnet Seabed Habitats download

Hierarchy level

Dataset

Statement

Multibeam echo-sounder (MBES) data were collected by Cefas and Natural England during the dedicated survey of the site in January 2014. Survey lines were performed in a north-south orientation with the aim to acquire full MBES data coverage. Bathymetric data were collected and processed in accordance with the International Hydrographic Organisation (IHO) Standards for Hydrographic Surveys - Order 1 (IHO, 2008). Processing of the backscatter data was undertaken by Cefas using the raw data collected. Further details on the acquisition and processing of MBES data can be found in the Kentish Knock East rMCZ Survey Report (Nicolaus and Ware, 2014). Processing of the bathymetry data was undertaken by Cefas using the Caris software package. Backscatter data was also processed by Cefas, using the software package QPS FM Geocoder Toolkit (FMGT). Fully compensated and corrected bathymetry and backscatter mosaic images were produced and exported as Floating Point Geotiff files for further analysis. Both bathymetry and backscatter were gridded at 2 m resolution for analysis (see Appendix 2 for images derived from acoustic data).

Ground truth stations were distributed across the rMCZ to ensure adequate density of sampling across all acoustically defined facies identified in the newly acquired MBES bathymetry and backscatter data. Benthic grabs and an underwater camera system were used at all stations to collect sediments, infauna, and video and still images of the seabed (Figure 2; Appendix 1).

Sampling equipment consisted of a 0.1 m2 mini Hamon grab. On recovery, the grab contents were emptied into a large plastic bin and a representative sub-sample of sediment (approx. 0.5 litres) taken for particle size analysis (PSA). The remaining sample was photographed and sieved over a 1 mm mesh sieve to collect the benthic fauna. Fauna were preserved in buffered 4% formaldehyde for later processing ashore. A drop-down camera frame was used to collect video and still images at all stations. Set-up and operation followed the MESH Recommended Operating Guidelines (ROG) for underwater video and photographic imaging techniques (Coggan et al., 2007). Drop camera tows lasted a minimum of 10 minutes at a speed of approximately 0.5 knots (c. 0.25 m s -1 ) across a 100 m ÔÇÿbullringÔÇÖ centred on the sampling station. Still images were captured at regular one-minute intervals and opportunistically if specific features of interest were encountered. Video and still images were analysed following an established protocol developed and used by Cefas (Coggan and Howell, 2005, JNCC, in prep.; see Annex 5). For further detail on ground truth sample collection see the Kentish Knock East rMCZ Survey Report (Nicolaus and Ware, 2014).

Metadata

File identifier

9397585f-cccb-4822-ad7b-a0c51b421c94 XML

Metadata language

English

Character set

MD_CharacterSetCode_utf8

Hierarchy level

Dataset

Date stamp

2020-01-15T12:21:41

Metadata standard name

ISO19115

Metadata standard version

2003/Cor.1:2006

Metadata author

Organisation name	Individual name	Electronic mail address	Role
JNCC		HabitatMapping@jncc.gov.uk	Point of contact