Monitoring the Dynamics of the North Llyn Modiolus Reef

  • English
  • wel
  • All

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

Dynodydd
Identifier
NRW_DS110890
Teitl Amgen
Alternative Title
  • Spat/larval settlement of modiolus on the North Llyn Reef
  • Monitro dynameg Riff Modiolus Gogledd Llyn
Laith Metadata
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
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2009-12-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Countryside Council for Wales (CCW)
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Cychwynnwr
Originator
  CCW Marine Monitoring Team
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Cychwynnwr
Originator
  Various contractors
See Natural Resources Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Hyd
Geographic Extent
Irish Sea
Hyd
Geographic Extent
Cardigan Bay
Hyd
Geographic Extent
Tremadog Bay
Hyd
Geographic Extent
GWYNEDD - GWYNEDD
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
benthic boundary layer

Maint Fertigol
Vertical Extent

Gwerth lleiaf
Minimum value (metres)
-30
Gwerth uchaf
Maximum value (metres)
-35
System Gyfeirio Cydlynu Fertigol
Vertical CRS
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ()

    Specification

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

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Allweddair
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
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Allweddair
Keywords

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

Dyfyniad
Citation

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

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
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

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
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

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

NRW_DS109743
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-12-09T12:31:05.14Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

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

Publishing Body

Access the portal