Monitoring the Dynamics of the North Llyn Modiolus Reef

Modiolus Reefs are a feature of the Pen Llyn a'r Sarnau Special Area of Conservation (SAC). Information is gathered about the dynamics of the reef through the recording of spat/larval settlement. This is used as an indicator of current/recent influences on the reef and can provide an early warning of potential problems. The purpose of this data capture was to investigate the dynamics of the reef. This contributes to reporting of favourable conservation status of the SAC feature. Data will be used in conjunction with acoustic methods which look at the extent of the feature (reef) and photo quadrat methods that look at the health of the feature.

Identification

Identifier
NRW_DS110890
Alternative Title
  • Spat/larval settlement of modiolus on the North Llyn Reef
  • Monitro dynameg Riff Modiolus Gogledd Llyn
Metadata Language
English
Lineage

Post-settlement juvenile 'spat' collectors were attached to the permanent monitoring station at Modiolus site 1. 3 kitchen scouring pads are attached by cable ties onto the pyramid marker at the site. The pads are recovered annually and placed in sealed plastic bags to present loss of juvenile mussels on the ascent back to the surface. Once back in the laboratory the spat collectors were fixed / stored in 4% formalin buffered with seawater. Upon analysis the spat collector pads were separated into 'inner' and 'outer' faces for settlement and then systematically scanned using a dissecting binocular microscope
Dataset Reference Date (Publication)
2009-12-31
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=/
Originator
  CCW Marine Monitoring Team
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Originator
  Various contractors
See Natural Resources Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Geographic Extent
Irish Sea
Geographic Extent
Cardigan Bay
Geographic Extent
Tremadog Bay
Geographic Extent
GWYNEDD - GWYNEDD
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)
-30
Maximum value (metres)
-35
Vertical CRS
 
 

Distribution

Format Type and Description
  • Documents ()

    Specification

    [A] Data stored a an excel spreadsheets and word documents. [B] Images are held as .jpeg 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

Post-settlement juvenile 'spat' collectors were attached to the permanent monitoring station at Modiolus site 1. 3 kitchen scouring pads are attached by cable ties onto the pyramid marker at the site. The pads are recovered annually and placed in sealed plastic bags to present loss of juvenile mussels on the ascent back to the surface. Once back in the laboratory the spat collectors were fixed / stored in 4% formalin buffered with seawater. Upon analysis the spat collector pads were separated into 'inner' and 'outer' faces for settlement and then systematically scanned using a dissecting binocular microscope
 

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
  • modiolus modiolus
  • horse mussel
  • marine monitoring (see also marine surveys)
  • Pen Llyn a'r Sarnau cSAC
  • biogenic reef
  • spat settlement
  • reef
  • reef dynamics
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

 

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 2010 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
4f4c4942-4343-5764-6473-313130383930 XML
Metadata Language
English
Parent Identifier
Across Wales Diving Monitoring Project (2004)

NRW_DS109743
Resource type
Dataset
Metadata Date
2024-12-09T12:31:05.14Z
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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