Monitoring of Subtidal Rocky Reef in Pembrokeshire Marine Special Area of Conservation (SAC)

This dataset consists of the results from an integrated monitoring strategy on a site level carried out to provide an overview of the status of reef feature within the Pembrokeshire MarineSpecial Area of Conservation (SAC) as a whole. Work is concentration on tide-swept infralittoral and circalittoral rock. 7 sites across the SAC selected and permanent monitoring quadrat established within each of the biotope complexes. Within the upper parts of the Milford Haven sites were established at Beggars Reach; Warrior and Dockyard Bank. Near to the mouth of the Haven; sites were established at Chapel Reef; Thorn Island; and Junkos Reef. A site was also established within the off-shore islands of The Smalls.

Identification

Identifier
NRW_DS111145
Alternative Title
  • Draft 2014 NRW/ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000035
  • Draft 2013 NRW/ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000034
  • Draft 2012 CCW/ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000032
  • 2010 CCW / ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW1630000002D
  • 2009 CCW / ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000020
  • 2008 CCW / ASML Pembrokeshire Marine SAC Rocky Reef Monitoring MRCCW16300000013
  • Quadrat monitoring in Pembrokeshire Marine SAC
  • Monitoring of tides-wept infralittoral and circalittoral rock in Pembrokeshire Marine SAC
  • Monitro riff yn ACA Sir Benfro Forol
Metadata Language
English
Lineage

At each site quadrats were generally established in rows of 4 quadrats at 2 or 3 depths at each site. A standard recording methodology was devised to allow comparisons to be made of the data collected at any site in any year. 0.5m x 0.5m quadrats are attached to the permanent markers. An initial assessment of the distribution of species within the quadrat as a whole is made. The abundant/dominant species are recorded first followed by the rare and cryptic species using a series of timed cell frequency counts is then undertaken to assess species diversity. 4 successive counting periods of 5 minutes each is taken noting presence of species from within each cell. Counting continues until a total period of 20 minutes. Where species cannot be identified; specimens are collected from outside the quadrat and identified later. A photo is taken of the species in-situ. A specimen catalogue for the whole SAC is also collated. Where time allows either a video of the quadrat is made of images of the quadrat are taken. Still images have been captured from video for each cell and 'stitched' to make a single image of the whole quadrat. Detailed methodologies and descriptions and variations at specific sites can be found in Marine Monitoring Report 25b (standard operating procedures 15). The majority of QA occurs at Thorn Island and allows for a subset of quadrats to be surveyed and compared prior to the data collection exercise. This allows all surveyors to refresh their skills and ensure species id is consistent. A subset of all quadrats are either photographed or recorded using video and the images archived to allow quadrats to be re-evaluated if necessary. Temperature and/or salinity loggers are also continuously logging at most of these site. Sponge thickness measures are also taken at Warrior Site. Analysis of the quadrat data may also be carried out in PRIMER.
Dataset Reference Date (Publication)
2010-09-23
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Various contractors
See Natural Resources Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresourceswales.gov.uk/splash?orig=/
Originator
  CCW Marine Monitoring Team
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
Celtic Sea
Geographic Extent
St. Brides Bay
Geographic Extent
Cardigan Bay
Geographic Extent
SIR BENFRO - PEMBROKESHIRE
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)
-0.9
Maximum value (metres)
-25
Vertical CRS
 
 

Distribution

Format Type and Description
  • Geographic Information System ()

    Specification

    [A] Quadrat data is stored as Excel spreadsheet. [B] Data will also be entered to Marine Recorder. [C] Images are store as .JPGs and .NEF raw files. [D] Video is stored on mini DV tape and streamed as .AVI files. [E] Stitched images are stored as .tif files.

 

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

At each site quadrats were generally established in rows of 4 quadrats at 2 or 3 depths at each site. A standard recording methodology was devised to allow comparisons to be made of the data collected at any site in any year. 0.5m x 0.5m quadrats are attached to the permanent markers. An initial assessment of the distribution of species within the quadrat as a whole is made. The abundant/dominant species are recorded first followed by the rare and cryptic species using a series of timed cell frequency counts is then undertaken to assess species diversity. 4 successive counting periods of 5 minutes each is taken noting presence of species from within each cell. Counting continues until a total period of 20 minutes. Where species cannot be identified; specimens are collected from outside the quadrat and identified later. A photo is taken of the species in-situ. A specimen catalogue for the whole SAC is also collated. Where time allows either a video of the quadrat is made of images of the quadrat are taken. Still images have been captured from video for each cell and 'stitched' to make a single image of the whole quadrat. Detailed methodologies and descriptions and variations at specific sites can be found in Marine Monitoring Report 25b (standard operating procedures 15). The majority of QA occurs at Thorn Island and allows for a subset of quadrats to be surveyed and compared prior to the data collection exercise. This allows all surveyors to refresh their skills and ensure species id is consistent. A subset of all quadrats are either photographed or recorded using video and the images archived to allow quadrats to be re-evaluated if necessary. Temperature and/or salinity loggers are also continuously logging at most of these site. Sponge thickness measures are also taken at Warrior Site. Analysis of the quadrat data may also be carried out in PRIMER.
 

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 monitoring (see also marine surveys)
  • Pembrokeshire Marine SAC
  • quadrats
  • Warrior
  • Chapel Reef
  • Thorn Island
  • Beggars Reach
  • The Smalls
  • Junkos Reef
  • Dockyard Bank
Type
Theme

Citation

Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
  • Zoobenthos taxonomy-related counts
  • Zoobenthos generic abundance
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

 

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 to this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW 2011 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
4f4c4942-4343-5764-6473-313131313435 XML
Metadata Language
English
Parent Identifier
Intertidal Monitoring of Rocky Reefs in Pembrokeshire Marine Special Area of Conservation (SAC) 2007-2010

NRW_DS115409
Resource type
Dataset
Metadata Date
2024-12-09T12:32:58.381Z
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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