Across Wales Drop-Down Video Monitoring Survey (2004–2005)
Gwaith monitro cwymp-gamerau ar draws Cymru 2004-2005

  • English
  • wel
  • All

This dataset comprises drop-down video surveys undertaken within Welsh Special Areas of Conservation (SACs) between 2004 and 2005 to support the monitoring and management of protected marine habitats and species. Surveys were conducted within Pen Llŷn a'r Sarnau SAC, Menai Strait and Conwy Bay SAC, Cardigan Bay SAC, and Pembrokeshire Marine SAC by SeaStar Survey under contract to the Countryside Council for Wales (CCW). The primary aim was to assess the extent, distribution and biotope diversity of reef and large shallow inlet and bay features, while providing baseline information to support site condition assessment, conservation management and statutory reporting requirements. Video observations were used to describe seabed habitats, substrata and associated biological communities and to classify habitats according to the JNCC Marine Habitat Classification. Survey locations included North Llŷn, Bardsey Island, Tremadog Bay, Moelfre, Cardigan Bay and several areas within Pembrokeshire Marine SAC. The resulting dataset provides a baseline record of subtidal habitats and communities across Welsh SACs and forms part of a long-term marine monitoring programme.


Only a redacted version of this data is available under the Open Governance Licence and available for public use, see Limitation on Public Access and Use Constraints. Species/habitats listed in NRWs guidance on ecological data and information exempt from general release will be redacted on release.

Identification

Dynodydd
Identifier
NRW_DS87090
Teitl Amgen
Alternative Title
  • 2004-2005 CCW Across Wales towed video monitoring survey (MRCCW31600000002)
Laith Metadata
Metadata Language
English
Lineage

Drop-down video surveys were undertaken by SeaStar Survey on behalf of the Countryside Council for Wales (CCW) between August 2004 and July 2005 using video systems deployed from the CCW research vessel Pedryn. Survey work in 2004 focused primarily on Cardigan Bay SAC, whilst surveys completed during 2005 covered Pen Llŷn a'r Sarnau SAC, Menai Strait and Conwy Bay SAC, and Pembrokeshire Marine SAC. Survey sites were selected through collaboration between CCW and SeaStar Survey using a stratified random sampling approach designed to provide representative coverage of designated features and areas of particular conservation interest.


Video surveys were conducted at fixed sampling locations to characterise seabed habitats, substrata and associated faunal communities. Survey data were analysed to assign habitat and biotope classifications using the Marine Nature Conservation Review (MNCR) methodology and the JNCC Marine Habitat Classification described by Connor et al. (2004). Additional diver-based ground-truthing surveys were undertaken in September 2004 at 22 sites to validate interpretations derived from video observations.


Quality assurance procedures and survey methodologies are documented within CCW Marine Monitoring Reports 24a and 24b. A subset of video data was re-analysed in 2010 to improve habitat and species resolution, and all video data were subsequently reviewed again in 2012. Species, habitat and biotope records generated from the surveys were entered into Marine Recorder. The dataset forms part of the Across Wales marine monitoring programme and provides a baseline against which future monitoring and condition assessments of Welsh SAC features can be undertaken.
Additional Information

Axelsson, Tourell, Holt, Lough (2006) Drop-down video monitoring in Wales 2004 - 2005. A report to the Countryside Council for Wales by SeaStar Survey, Southampton, SO14 5QY. CCW Marine Monitoring Report No: 24a
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2006-05-31

Temporal Extent

Begin date
2004-08-23
End date
2005-07-17
 
Categori pwnc
Topic category
  • Biota
    Biota
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  SeaStar Survey Marine Data Acquisition -
Ocean Quay Marina, Belvidere Road, Southampton, SO14 5QY
http://www.seastarsurvey.co.uk/
Cychwynnwr
Originator
  Coastal Assessment Liaison and Monitoring (CALM) -
Ti Cara, Point Lane, Cosheston, Pembrokeshire, SA72 4UN, Wales
<!--No website -->
 

Extent

Extent

Hyd
Geographic Extent
Irish Sea
Hyd
Geographic Extent
Menai Strait
Hyd
Geographic Extent
Tremadog Bay
Hyd
Geographic Extent
Carmarthen Bay
Hyd
Geographic Extent
Swansea Bay
Hyd
Geographic Extent
Cardigan Bay
Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer

Maint Fertigol
Vertical Extent

Gwerth lleiaf
Minimum value (metres)
0
Gwerth uchaf
Maximum value (metres)
43.2
System Gyfeirio Cydlynu Fertigol
Vertical CRS
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Database ( Marine Recorder Online - Version 2.09.02 )

    Specification

    Marine Recorder

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Drop-down video surveys were undertaken by SeaStar Survey on behalf of the Countryside Council for Wales (CCW) between August 2004 and July 2005 using video systems deployed from the CCW research vessel Pedryn. Survey work in 2004 focused primarily on Cardigan Bay SAC, whilst surveys completed during 2005 covered Pen Llŷn a'r Sarnau SAC, Menai Strait and Conwy Bay SAC, and Pembrokeshire Marine SAC. Survey sites were selected through collaboration between CCW and SeaStar Survey using a stratified random sampling approach designed to provide representative coverage of designated features and areas of particular conservation interest.


Video surveys were conducted at fixed sampling locations to characterise seabed habitats, substrata and associated faunal communities. Survey data were analysed to assign habitat and biotope classifications using the Marine Nature Conservation Review (MNCR) methodology and the JNCC Marine Habitat Classification described by Connor et al. (2004). Additional diver-based ground-truthing surveys were undertaken in September 2004 at 22 sites to validate interpretations derived from video observations.


Quality assurance procedures and survey methodologies are documented within CCW Marine Monitoring Reports 24a and 24b. A subset of video data was re-analysed in 2010 to improve habitat and species resolution, and all video data were subsequently reviewed again in 2012. Species, habitat and biotope records generated from the surveys were entered into Marine Recorder. The dataset forms part of the Across Wales marine monitoring programme and provides a baseline against which future monitoring and condition assessments of Welsh SAC features can be undertaken.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • drop-down video
  • Marine Recorder
  • towed video
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-10-28
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Drop-down Video Footage and Biotope Identification Data 1999
NRW Related Title

The establishment of a programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a'r Sarnau cSAC : 1. Progress to March 2001
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

Part of this dataset is sensitive and restricted as it contains data exempt from general release under EIR. NRW may NOT publish or disseminate the sensitive data. Requests should be referred to NRW's Access to Information Officer. However, there are no access restrictions on non-sensitive data. NRW may release, publish or disseminate a redacted version of the data freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW. NRW does NOT grant permission to third parties to re-use or disseminate the full dataset. A redacted version of the data may be re-used under the terms of the Open Government Licence, provided that the source and NRW's copyright are acknowledged. It is the recipient's responsibility to ensure that the data is fit for its intended purpose.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-3837303930 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder

NRW_DS114501
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-10-29T11:55:47.341Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

Access the portal