Intertidal Monitoring of Sabellaria alveolata in Cardigan Bay Special Areas of Conservation (SACs) 2025
The Habitats Directive requires the management of Special Areas of Conservation (SACs) to achieve favourable conservation status for habitats and species listed in Annex I and Annex II. Under Regulation 9a of the Habitats Regulations (formerly Article 17), the conservation status of these features must be reported every six years. In Wales, Natural Resources Wales (NRW) is responsible for this reporting.
Sabellaria alveolata (honeycomb reef worm) forms biogenic reef structures on rocky substrates in intertidal and shallow subtidal marine and estuarine environments. Dense aggregations create reef formations that are important habitat features within SACs.
This dataset provides information on the extent and condition of Sabellaria alveolata reef at surveyed locations.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS161532
- Alternative Title
-
- 2025 NRW Cardigan Bay Special Area of Conservation (SAC) Sabellaria Reef Monitoring (2d2cc2ad-c399-48ab-a62d-20d2832c07d1)
- Monitro Riffiau Sabellaria Ardal Cadwraeth Arbennig (ACA) Bae Ceredigion CNC 2025
- Metadata Language
- English
- Lineage
-
The data were collected as part of Natural Resources Wales’ programme of feature condition monitoring to support Regulation 9a reporting. Surveys were undertaken at specific locations to measure the extent of Sabellaria alveolata reef and to assess reef quality.
Sabellaria alveolata reefs were identified and mapped based on field survey observations, with reef structures characterised by aggregations of sand- and shell-based tubes forming hummocks, sheets or more complex biogenic formations.
The dataset is derived from targeted surveys undertaken by experienced staff, and confidence in the data is considered high. However, the data represent a snapshot in time and are dependent on survey coverage and methodology.
- Dataset Reference Date (Creation)
- 2026-03-12
- Dataset Reference Date (Publication)
- 2026-05-21
Temporal Extent
- Begin date
- 2025-04-27
- End date
- 2025-04-28
- Topic category
-
- Environment
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- infralittoral
- Medin Extent Keyword
- littoral
Vertical Extent
- Minimum value (metres)
- 5
- Maximum value (metres)
- -20
- Vertical CRS
Distribution
Distribution
- Format Type and Description
-
-
Database
(
Unknown
)
-
Delimited
(
Unknown
)
-
Geographic Information System
(
Unknown
)
- Specification
-
ESRI Feature Class
-
Image
(
Unknown
)
-
Database
(
Unknown
)
- Resource Locator
- View data ( WWW:LINK-1.0-http--link )
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
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
-
The data were collected as part of Natural Resources Wales’ programme of feature condition monitoring to support Regulation 9a reporting. Surveys were undertaken at specific locations to measure the extent of Sabellaria alveolata reef and to assess reef quality.
Sabellaria alveolata reefs were identified and mapped based on field survey observations, with reef structures characterised by aggregations of sand- and shell-based tubes forming hummocks, sheets or more complex biogenic formations.
The dataset is derived from targeted surveys undertaken by experienced staff, and confidence in the data is considered high. However, the data represent a snapshot in time and are dependent on survey coverage and methodology.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- Annex 1 habitats
- biogenic reef
- sabellaria alveolata
- Type
- Theme
Citation
- Date (Publication)
- 2026-03-04
Keywords
-
SeaDataNet Parameter Discovery Vocabulary
-
- Habitat characterisation
- Habitat extent
- Zoobenthos taxonomic abundance
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
- Code
- WGS 84 (EPSG:4326)
Content
Content Information
NRW Profile
Custom Elements
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- noLimitations
Access Constraints Text
- Other constraints
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Attribution Statement
- Other constraints
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights reserved.
Licence
- Other constraints
- Open Government Licence
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313631353332 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
- 2026-05-21T13:16:56.016Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0