Identification

Title

Broadscale habitat (EUNIS level 3) for North West of Jones Bank recommended Marine Conservation Zone (rMCZ)

Abstract

A broadscale habitat layer was produced by analysing and interpreting the acoustic and ground truth data collected by Gardline onboard the MV Tridens onboard 29th February and 31st March 2012and RV Cefas Endeavour between 11th and 12th July 2012 . PSA data were used to assign each sample a EUNIS class which then informed the expert visual interpretation process of map production. Additional information source: Jones, A., Le Bas, T., Wynn, R. 2015. North-West of Jones Bank rMCZ Post-survey Site Report http://randd.defra.gov.uk/Document.aspx?Document=12846_NorthWestJonesBankrMCZ_SiteReport_v6.pdf

Resource type

dataset

Resource locator

http://data.jncc.gov.uk/data/8a61a51f-3fad-42f2-9d3e-9a660e85f7e5-GB001316.zip

name: GB001316.zip

Unique resource identifier

code

8a61a51f-3fad-42f2-9d3e-9a660e85f7e5

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Additional information source

Jones, A., Le Bas, T., Wynn, R. 2015. North-West of Jones Bank rMCZ Post-survey Site Report http://randd.defra.gov.uk/Document.aspx?Document=12846_NorthWestJonesBankrMCZ_SiteReport_v6.pdf

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Marine

Seabed Habitats and Geology

GB001316

Corpulent

EUNIS

Data Provider Agreement not required - FULL ACCESS

Nature Conservation

Drop camera

Grabs

Multibeam echo sounder

Particle size analysis

Geographic location

West bounding longitude

-8.3333

East bounding longitude

-8.054499

North bounding latitude

50.004712

South bounding latitude

49.825201

Temporal reference

Temporal extent

Begin position

2012-02-29

End position

2012-07-12

Dataset reference date

date type

publication

effective date

2016-01-02

Frequency of update

Quality and validity

Lineage

Updated version of earlier broadscale habitat feature class NWJB_20140912_BSH_DRAFT, with all polygons less than 200 sqm in area merged to neigbouring polygon with the longest shared border. Bathymetry and backscatter data collected by Gardline onboard the MV Tridens onboard 29th February and 31st March 2012 were used in conjunction with ground thruth samples to produce a Broadscale habitat map of North West of Jones Bank. Ground thruth samples were collected on both Gardline and Cefas survey cruises from 50 stations. Benthic grabs were taken at 44 stations. An underwater camera system was deployed at 17 stations to collect video and still information. Sediment samples were collected with a grab system consisting of a 0.1 m2 mini Hamon grab and Day Grab. On recovery, the grab was emptied into a large plastic bin and a representative subsample of sediment (approx. 0.5 litres) taken for particle size analysis (PSA). The remaining sample was photographed, then sieved over a 1 mm mesh to collect the benthic macrofauna. Camera deployments lasted a minimum of 10 minutes, with the vessel using its dynamic positioning capability to move along the planned transect at c. 0.5 knots (c. 0.25 ms-1) across a 100 m ‘bullring’ centred on the sampling station. Still photographic images were captured at one minute intervals and opportunistically if features of interest were observed. Video and photographic still images were processed by Envision Mapping Ltd in accordance with the guidance documents developed by Cefas and the JNCC for the acquisition and processing of video and still data (Coggan and Howell, 2005). Particle size analysis (PSA) was carried out by Cefas following standard laboratory practice, and results were checked by Cefas specialist staff following the recommendations of the National Marine Biological Analytical Quality Control (NMBAQC) scheme (Mason, 2011). Setup and operation followed the MESH ‘Recommended Operating Guidelines (ROG) for underwater video and photographic imaging techniques’ (Cogganet al., 2007).

Conformity

Data format

name of format

Geospatial (vector polygon)

version of format

Unknown

Constraints related to access and use

Constraint set

Use constraints

Available under the Open Government Licence 3.0

Limitations on public access

None

Responsible organisations

Responsible party

organisation name

Digital and Data Solutions, JNCC

email address

data@jncc.gov.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Digital and Data Solutions, JNCC

email address

data@jncc.gov.uk

responsible party role

pointOfContact

Metadata date

2018-06-14

Metadata language

eng