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
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS110890
- Alternative Title
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- 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
Temporal Extent
- Begin date
- 2004-07-13
- End date
- 2009-12-31
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- Irish Sea
- Geographic Extent
- Cardigan Bay
- Geographic Extent
- Tremadog Bay
- Geographic Extent
- GWYNEDD - GWYNEDD
))
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
-
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Documents
Documents
()
- Specification
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[A] Data stored a an excel spreadsheets and word documents. [B] Images are held as .jpeg Files.
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Documents
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- 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
Keywords
- NRW Thesaurus
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- 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
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
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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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
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© 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
- 2024-05-31T09:41:18.267Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0