Gweunydd Nant y Twyn SSSI - National Vegetation Classification (NVC) Grassland Survey (2024)
A standard Phase 2 NVC survey was undertaken at Gweunydd Nant y Twyn as part of the Site of Special Scientific Interest (SSSI) designation process.
Gweunydd Nant y Twyn consists of a cluster of small fields, with tall, wooded hedgerows. The site is of particular importance for bryophytes.
The site comprises the original Phase 2 site survey site of Mockridge et al. 1998, which has now been resurveyed (2024) and extended to include several contiguous small fields, and a further extension centred on 5 small nearby fields, approximately 1/3rd of a km to the north, linked by a block of woodland and pasture. The total area of the Phase 2 survey site is now 39.9ha.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS161349
- Alternative Title
-
- Metadata Language
- English
- Lineage
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Standard National Vegetation Classification (NVC) survey techniques were used. The survey was carried out in-house by Natural Resources Wales (NRW) staff.
Note, the Phase 2 survey site boundary does not coincide with the Gweunydd Nant y Twyn SSSI boundary, which excludes certain fields of more modified grassland.
Currently we are unable release this data, as the SSSI is undesignated. In addition, one of the files contains sensitive species.
- Additional Information
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Westwood, S. & Bosanquet, S. 2025. NRW Lowland Grassland Survey and Site Description of ST 19/17 Gweunydd Nant y Twyn Revisit and New Annex. NRW Report No: 864, 25pp, Natural Resources Wales, Cardiff.
- Dataset Reference Date (Creation)
- 2025-03-06
Temporal Extent
- Begin date
- 2024-06-13
- End date
- 2024-10-10
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
Distribution
- Format Type and Description
-
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Documents
(
Unknown
)
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Geographic Information System
(
Unknown
)
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Image
(
Unknown
)
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Documents
(
Unknown
)
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
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
-
Standard National Vegetation Classification (NVC) survey techniques were used. The survey was carried out in-house by Natural Resources Wales (NRW) staff.
Note, the Phase 2 survey site boundary does not coincide with the Gweunydd Nant y Twyn SSSI boundary, which excludes certain fields of more modified grassland.
Currently we are unable release this data, as the SSSI is undesignated. In addition, one of the files contains sensitive species.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- Phase 2 Survey (Phase II)
- lowland grassland
- National Vegetation Classification (NVC)
- SSSI (Sites of Special Scientific Interest)
- Type
- Theme
Citation
- Date (Publication)
- 2025-01-08
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Text
- Other constraints
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Access restrictions on this data have not been determined. It may contain sensitive information and therefore may be restricted under legislation. NRW may provide access to this dataset on request, however NRW may not release, publish or disseminate the data or derived products freely without further assessment.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW. Data may only be re-used externally under provision and in line with the terms of a NRW licence following an assessment of the data.
Attribution Statement
- Other constraints
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© CNC/NRW