Sublittoral Monitoring Trials of Sarn Badrig Reef (1997 - 1998)
The data was captured in order to assess the suitability of the biotope classification monitoring method trialled. Sublittoral monitoring trials were done to investigate the extent of biotopes on Sarn Badrig reef- the most extensive of three Sarnau reefs within Pen Llyn a'r Sarnau SAC. In total three surveys were been carried out to investigate the biotopes present. 1) A 1998 survey to evaluate the deployment of divers for measuring the extent of the Sarnau reef biotopes. 2) A 1999 survey of Sarn Badrig reef using quadrat methodology. 3) A 1999 transect survey of the reef.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS111173
- Alternative Title
-
- 1998 CCW Sarnau sublittoral monitoring trials JNCCMNCR40000773
- 1999 CCW Sarn Badrig Monitoring Trials MRCCW30000000006
- 1999 CCW Sarn Badrig Reef sublittoral monitoring trial JNCCMNCR40000776
- Profion monitro isarforol ar riff Sarn Badrig
- Metadata Language
- English
- Lineage
-
Survey 1: A 1998 survey to evaluate the deployment of divers for measuring the extent of the Sarnau reef biotopes. A shot line was deployed from which divers reeled-out a 50m tape from a pole. The pole was designed to measure a fixed transect width. Two transect locations were chosen to include the full range of broad habitats present. Four broad trial zones were identified and in each, three sampling points were randomly selected. Species and abundances were recorded in-situ using standard protocol. Survey 2: A 1999 survey of Sarn Badrig reef using quadrat methodology. The initial survey deployed four pairs of divers to map out habitat features of the area surrounding a fixed station. Four quadrats were placed by an expert algologist to represent the range of variability in the community composition within the biotope present. At each, species were recorded by seven diving surveyors, who recorded individual counts, % areas of cover and 'cell frequency'. The species data recorded in Marine Recorder only includes the individual counts of species. Survey 3: A 1999 transect survey of the reef. Stratified random selection of sites were investigated using a `roll-out` transect technique. Three main `sites` were surveyed comprising strings of sampling stations in lines perpendicular to the reef crest: - one on the seaward limit of the reef, one mid-reef and another across the eastern third of the reef. Records were made using Marine Nature Conservation Review (MNCR) abundance scales.
- Dataset Reference Date (Publication)
- 2001-04-01
Temporal Extent
- Begin date
- 2018-02-12
- End date
- 1999-10-07
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- Irish Sea
- Geographic Extent
- Cardigan Bay
- Geographic Extent
- Tremadog Bay
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
-
benthic boundary layer
Vertical Extent
- Minimum value (metres)
- -7
- Maximum value (metres)
- -12.5
- Vertical CRS
- urn:ogc:def:datum:EPSG::5100 Sea Level depth is unadjusted and does not take into account tidal height
Distribution
- Format Type and Description
-
-
Documents
Documents
()
- Specification
-
[A] The data on species, sediment analysis, biotope etc are held in Marine Recorder. [B] Hardcopy MNCR forms are also available. [C] The results of the 1998 trial are also discussed in a hardcopy report format.
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Documents
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Survey 1: A 1998 survey to evaluate the deployment of divers for measuring the extent of the Sarnau reef biotopes. A shot line was deployed from which divers reeled-out a 50m tape from a pole. The pole was designed to measure a fixed transect width. Two transect locations were chosen to include the full range of broad habitats present. Four broad trial zones were identified and in each, three sampling points were randomly selected. Species and abundances were recorded in-situ using standard protocol. Survey 2: A 1999 survey of Sarn Badrig reef using quadrat methodology. The initial survey deployed four pairs of divers to map out habitat features of the area surrounding a fixed station. Four quadrats were placed by an expert algologist to represent the range of variability in the community composition within the biotope present. At each, species were recorded by seven diving surveyors, who recorded individual counts, % areas of cover and 'cell frequency'. The species data recorded in Marine Recorder only includes the individual counts of species. Survey 3: A 1999 transect survey of the reef. Stratified random selection of sites were investigated using a `roll-out` transect technique. Three main `sites` were surveyed comprising strings of sampling stations in lines perpendicular to the reef crest: - one on the seaward limit of the reef, one mid-reef and another across the eastern third of the reef. Records were made using Marine Nature Conservation Review (MNCR) abundance scales.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
-
- marine biodiversity
- marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
- marine surveys (intertidal & subtidal surveys) (littoral survey) (sublittoral surveys) (bathymetric survey) (see also marine monitoring and MNCR)
- monitoring (see specific types of monitoring eg. woodland monitoring)
- methodology
- survey methods (survey techniques) (survey) (surveying)
- trials
- biotopes
- Sarn Badrig Reef
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Habitat extent
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
The establishment of a programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a'r Sarnau cSAC : 1. Progress to March 2001
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
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 copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313131313733 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
- 2024-05-31T09:41:16.216Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0