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

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
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Countryside Council for Wales (CCW)
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Geographic Extent
Irish Sea
Geographic Extent
Cardigan Bay
Geographic Extent
Tremadog Bay
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

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 ()

    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.

 

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
Degree
false
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

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

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
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
  • Habitat extent
Type
Theme

Citation

Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

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

pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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