Intertidal Monitoring of Sabellaria alveolata in Cardigan Bay Special Areas of Conservation (SACs) 2004

The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. Honeycomb reef worm Sabellaria alveolata is a sedentary, tube-dwelling polychaete most commonly found on rocky substrata in the lower shore and shallow subtidal zones of marine and estuarine areas. The honeycomb reef worm is a UK BAP Priority Habitat (BAP habitats are now Habitats of Principal Importance/Priority Habitats). Honeycomb worms build tubes from sand and shell fragments. They are found on the lower part of rocky seashores but they also need a sand supply for tube-building. Dense congregations of Sabellaria alveolata tubes form large biogenic reef structures, which can be up to a metre thick and take the form of hummocks, sheets or more massive formations. The purpose of this data capture was to identify specific survey locations and to measure the extent of Sabellaria alveolata reef along agreed transects, and assess the quality of Sabellaria alveolata reef present and map and make notes on any sightings of wireweed Sargassum muticum. Confidence in this dataset is high as surveys were undertaken by experienced staff.

Identification

Identifier
NRW_DS101995
Alternative Title
  • 2004 CCW / IECS Cardigan Bay SAC Sabellaria alveolata reef monitoring MRCCW3020000000F
  • Monitro Rhynglanwol: Sabellaria alveolata yn ACA Bae Caerfyrddin
Metadata Language
English
Lineage

The four areas of S. alveolata within the Cardigan Bay intertidal area were surveyed in September 2004, working two hours either side of low water. Transect lines were mapped using an ORMTEC GIS412 portable dGPS, with software and logger developed specifically for this type of mapping. This system provides continuous or point logging facilities using the IRLA network, providing a temporal repeatable accuracy of between 1-5m with the data subsequently downloaded onto a PC for input into GIS. In order to achieve repeatability in survey techniques between sites, a working protocol was used.
Dataset Reference Date (Publication)
2008-12-31
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Countryside Council for Wales (CCW)
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Originator
  Hull University. Institute Of Estuarine And Coastal Studies
The University of Hull, Cottingham Road, Hull, HU6 7RX
http://www.hull.ac.uk/iecs/
 

Extent

Extent

Geographic Extent
Caernarvonshire (49)
Geographic Extent
Merionethshire (48)
Geographic Extent
SIR CEREDIGION - CEREDIGION
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
benthic boundary layer
 
 

Distribution

Format Type and Description
  • Documents ()

    Specification

    [A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version [B] MapInfo GIS layer in MapInfo Native format (Tables): - Positions of survey transects at Aberaeron and Cei Bach. - Positions of records of Sargassum muticum - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheets of transect details, Sabellaria reef quality and presence of Sargassum muticum. [D] Photographs from each survey site and habitat. [E] Marine Recorder file: MRCCW3020000000F

 

Quality

Data quality

Quality Scope
Dataset
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
Degree
false
Lineage

The four areas of S. alveolata within the Cardigan Bay intertidal area were surveyed in September 2004, working two hours either side of low water. Transect lines were mapped using an ORMTEC GIS412 portable dGPS, with software and logger developed specifically for this type of mapping. This system provides continuous or point logging facilities using the IRLA network, providing a temporal repeatable accuracy of between 1-5m with the data subsequently downloaded onto a PC for input into GIS. In order to achieve repeatability in survey techniques between sites, a working protocol was used.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

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

Keywords

NRW Thesaurus
  • Cardigan Bay SAC
  • Cei Bach
  • Aberarth
  • Craig Ddu
  • Aberaeron
  • Aberporth
  • marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
  • Special Areas of Conservation (SAC) - SAC monitoring
  • sabellaria alveolata
  • polychaete worms
  • Tresaith
  • biogenic reef
  • honeycomb worm
Type
Theme

Citation

Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Zoobenthos taxonomic abundance
Type
Theme

Citation

Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

NRW Related Title

Intertidal monitoring of sabellaria alveolata reefs in Cardigan Bay SAC in 2004
 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW 2008. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313031393935 XML
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder

NRW_DS114501
Resource type
Dataset
Metadata Date
2024-12-09T12:33:30.366Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

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

Publishing Body

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