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
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS101995
- Alternative Title
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- 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
Temporal Extent
- Begin date
- 2004-09-01
- End date
- 2004-09-03
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- Caernarvonshire (49)
- Geographic Extent
- Merionethshire (48)
- Geographic Extent
- SIR CEREDIGION - CEREDIGION
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
-
-
Documents
()
- Specification
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[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
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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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
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- 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
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Zoobenthos taxonomic abundance
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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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
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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
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© 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