Intertidal Monitoring of Sabellaria Reef in Cardigan Bay Special Areas of Conservation (SAC) 2007
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). Cardigan SAC is designated for a number of features, including Bottlenosed dolphins, Sandbanks, Reefs and Sea Caves, and some intertidal features including areas of bedrock and boulder/cobble habitats and many areas are characterised by biogenic reef formed by the honeycomb reef worm Sabellaria alveolata. This dataset includes the results of a survey of the biogenic reef formed by the honeycomb reef worm Sabellaria alveolata at two sites within Cardigan Bay SAC. The purpose of this data capture was to establish sites for long term monitoring and collect baseline/reference data using appropriate methods. This is a high quality survey carried out by an experienced team of marine biologists.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS111178
- Alternative Title
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- Gwaith monitro rhynglanwol ar riff Sabellaria yn ACA Bae Ceredigion yn 2007
- 2007 CCW/ASML Cardigan Bay SAC Sabellaria reef monitoring MRCCW16300000002
- Metadata Language
- English
- Lineage
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Methodology used was a modified version of the transect survey methodology developed for Pen Llyn a'r Sarnau SAC (2008). Existing maps of Sabellaria extent were used to define the survey area within which a series of 11 transects were drawn at 50 m intervals approximately perpendicular to the coastline. Along each transect notes were made on habitat, community and condition/age of Sabellaria reef. Photographs were also taken to illustrate habitat and condition of the reef. 1 or 2 stations were used per transect for quadrat surveys. At each survey station a gridded 0.25m2 quadrat was placed randomly 15 times within a radius of 10m. Digital photographs were taken of each quadrat and a full survey was carried out on the first 5 quadrats to record % cover of standing water, total Sabellaria and live Sabellaria, key species/taxa, other typical fauna and flora. The other 10 quadrats were used to carry out additional recording of Sabellaria cover. The extent of the reef was mapped using the track function of handheld GPS units. Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC in 1996 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Surveys of Sabellaria reefs in the SAC were carried out for CCW in 2004 (Boyes et al. 2008). Additional mapping of Sabellaria reef extent at Aberaeron was carried out by CMACS Ltd. (sub-contracted by Atkins Ltd.) in August 2006 as part of an Environmental Assessment for proposed Aberaeron North Beach Coastal Defence Work (unpublished data provided by Atkins Ltd.).
- Dataset Reference Date (Publication)
- 2009-03-31
Extent
Extent
- Geographic Extent
- SIR CEREDIGION - CEREDIGION
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
-
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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] Excel Spreadsheets of data: - Card 2007 Data for Marine Recorder v3.xls [C] Marine Recorder file: MRCCW16300000002 [D] A series of MapInfo GIS layers in MapInfo Native format (Tables). Translations from the MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [E] Photos
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Methodology used was a modified version of the transect survey methodology developed for Pen Llyn a'r Sarnau SAC (2008). Existing maps of Sabellaria extent were used to define the survey area within which a series of 11 transects were drawn at 50 m intervals approximately perpendicular to the coastline. Along each transect notes were made on habitat, community and condition/age of Sabellaria reef. Photographs were also taken to illustrate habitat and condition of the reef. 1 or 2 stations were used per transect for quadrat surveys. At each survey station a gridded 0.25m2 quadrat was placed randomly 15 times within a radius of 10m. Digital photographs were taken of each quadrat and a full survey was carried out on the first 5 quadrats to record % cover of standing water, total Sabellaria and live Sabellaria, key species/taxa, other typical fauna and flora. The other 10 quadrats were used to carry out additional recording of Sabellaria cover. The extent of the reef was mapped using the track function of handheld GPS units. Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC in 1996 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Surveys of Sabellaria reefs in the SAC were carried out for CCW in 2004 (Boyes et al. 2008). Additional mapping of Sabellaria reef extent at Aberaeron was carried out by CMACS Ltd. (sub-contracted by Atkins Ltd.) in August 2006 as part of an Environmental Assessment for proposed Aberaeron North Beach Coastal Defence Work (unpublished data provided by Atkins Ltd.).
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- Cardigan Bay SAC
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- Special Areas of Conservation (SAC) - SAC monitoring
- intertidal
- sabellaria alveolata
- polychaete worms
- reef
- Cei Newydd
- Aberaeron
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- 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 SAC monitoring Cardigan Bay SAC May 2007
- NRW Related Title
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Intertidal SAC monitoring Cardigan Bay SAC May 2008
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 2009 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
- 4f4c4942-4343-5764-6473-313131313738 XML
- Metadata Language
- English
- Parent Identifier
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Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T12:37:17.38Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0