Carmarthen Bay Intertidal Attributes and Monitoring Techniques - Saltmarsh Boundaries
The Burry Inlet is the large estuary of the River Loughor, which separates the Gower Peninsula from the mainland. The Burry Inlet is a Special Protection Areas (SPA) and Ramsar site and its Atlantic and Mediterranean Saltmeadows have contributed to its designation as a Special Area of Conservation (SAC). The saltmarsh habitats here correspondingly determine the border of important mudflat and sandflats within the SAC. The area of saltmarsh within the Burry Inlet is regarded the most extensive site of such vegetation in Wales. In 1998, a National Vegetation Classification (NVC) survey was carried out by Prosser and Wallace (1999) for the Countryside Council for Wales (CCW), to provide more detailed information on the distribution of key elements of saltmarsh within the estuary. They mapped an area of 1879 ha of saltmarsh vegetation. As part of the ongoing monitoring program for Countryside Council for Wales (CCW), the Institute of Estuarine and Coastal Studies (IECS) were commissioned to carry out further monitoring at key sites in order to provide an understanding of the dynamics of the saltmarsh and mudflat/sandflat habitats. The purpose of the data capture was to map the seaward boundary of saltmarsh at Llanrhidian Marshes between Great Pill and Salthouse Point; map the seaward boundary of saltmarsh between Penrhyn Gwyn and Loughor Bridge and record positions of outlying Spartina anglica tufts at both locations.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS102034
- Alternative Title
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- Technegau Monitro a Phriodoleddau Rhynglanwol Bae Caerfyrddin - Terfynau'r Morfa Heli
- Metadata Language
- English
- Lineage
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Monitoring took place at three sites within the Burry Inle; Llanrhidian Marshes, Morfa Bacas and Penrhyn Gwyn Site of Special Scientific Interest (SSSI). The surveys at both locations were carried out over one tidal cycle, working 3 hours either side of low water. At Llanrhidian Marshes a quad bike was used to map the saltmarsh expanse between Great Pill and Salthouse Point (7.5 km) in order to cover the distance within one tidal cycle. A continuous boundary track was recorded along the saltmarsh edge with the differential GPS logger (GPS expected to have an accuracy of 1 - 5 metres) and photographs taken at appropriate locations. At Morfa Bacas and Penrhyn Gwyn SSSI the area between Loughor Bridge and Penrhyn Gwyn was surveyed on foot due to difficult terrain. A continuous boundary track was recorded along the saltmarsh edge with the differential GPS logger and photographs taken at appropriate locations. In 1998, a NVC survey was carried out by Prosser and Wallace (1999) for the Countryside Council for Wales (CCW), to provide more detailed information on the distribution of key elements of saltmarsh within Burry Inlet. Phase 1 biotope survey carried out by CCW in 2000 also defined the seaward boundary of the saltmarsh. IECS have since been commissioned to carry out further monitoring at key sites.
- Dataset Reference Date (Publication)
- 2008-12-31
Temporal Extent
- Begin date
- 2004-09-13
- End date
- 2004-09-14
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
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benthic boundary layer
Distribution
- Format Type and Description
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Geographic Information System
Geographic Information System
()
- 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): - Position of the saltmarsh boundaries at 2 locations in the Burry Inlet. - Position of the saltmarsh boundaries from CCW saltmarsh survey data 1998. - Positions of photograph points. - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheet of positions of photographs. [D] Photographs of the survey sites and quadrats.
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Geographic Information System
Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Monitoring took place at three sites within the Burry Inle; Llanrhidian Marshes, Morfa Bacas and Penrhyn Gwyn Site of Special Scientific Interest (SSSI). The surveys at both locations were carried out over one tidal cycle, working 3 hours either side of low water. At Llanrhidian Marshes a quad bike was used to map the saltmarsh expanse between Great Pill and Salthouse Point (7.5 km) in order to cover the distance within one tidal cycle. A continuous boundary track was recorded along the saltmarsh edge with the differential GPS logger (GPS expected to have an accuracy of 1 - 5 metres) and photographs taken at appropriate locations. At Morfa Bacas and Penrhyn Gwyn SSSI the area between Loughor Bridge and Penrhyn Gwyn was surveyed on foot due to difficult terrain. A continuous boundary track was recorded along the saltmarsh edge with the differential GPS logger and photographs taken at appropriate locations. In 1998, a NVC survey was carried out by Prosser and Wallace (1999) for the Countryside Council for Wales (CCW), to provide more detailed information on the distribution of key elements of saltmarsh within Burry Inlet. Phase 1 biotope survey carried out by CCW in 2000 also defined the seaward boundary of the saltmarsh. IECS have since been commissioned to carry out further monitoring at key sites.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- Carmarthen Bay
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- saltmarsh (salt-marsh) (salt marsh)
- Burry Inlet
- Special Protection Areas (SPAs) (see also proposed Special Protection Area pSPA)
- marine surveys (intertidal & subtidal surveys) (littoral survey) (sublittoral surveys) (bathymetric survey) (see also marine monitoring and MNCR)
- mudflats
- Llanrhidian
- Penrhyn Gwyn
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat extent
- 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 the saltmarsh boundaries in the Burry Inlet Carmarthen Bay and estuaries 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
- 4f4c4942-4343-5764-6473-313032303334 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:31:48.785Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0