Sediment Core Sampling of Seagrass (Zostera) Bed and Sediment Areas in Porth Dinllaen
As part of the management of the Pen Llyn a'r Sarnau Special Area of Conservation (SAC), the SAC Officer has been working with the National Trust, local fishermen, boat owners and others to look at options to reduce the impact of moorings on the seagrass (Zostera marina) bed at Porth Dinllaen, North Wales. This is a joint project between Countryside Council for Wales (CCW) and Gwynedd County Council as part of the Pen Llyn a'r Sarnau SAC. As part of the Porth Dinllaen seagrass project a variety of studies are being undertaken to secure an appropriate baseline to establish a detailed picture of the current condition of the seagrass bed that can be used as a reference point to monitor recovery in the future as the project proceeds. These were conducted to aid in the management of the seagrass bed (Zostera marina) present, listed as an important feature under Regulation 35 for the Pen Llyn a'r Sarnau Special Area of Conservation. This project was a component of a much larger venture which aims to better understand the local ecology and biology of Porth Dinllaen seagrass bed, with an ultimate goal of developing more seagrass friendly moorings and management techniques. The project has been let in 4 stages: 1) The core and sediment samples and field notes were collected by MES on the 10th October 2) The cores were sent to Thomson Unicomarine for infauna and sediment analysis (By CCW) 3) The species data was sent to MES analysed in PRIMER (Paid by GCC) 4) The analysed data was entered into Marine Recorder under the PKC data capture contract
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115274
- Alternative Title
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- 2012 CCW Porth Dinllaen Seagrass Bed Infauna and Sediments Survey MRCCW31700000008
- Samplo craidd gwaddod o wely Morwellt (zostera) ac ardaloedd gwaddodi ym Mhorth Dinllaen
- Metadata Language
- English
- Lineage
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A total of 24 subtidal infaunal sediment cores and 8 sediment particle analysis cores have been collected from three different habitats within the area of the Porth Dinllaen seagrass bed: -mooring scar areas (3 sample locations with 3 replicate infaunal cores and 1 sediment core at each location), -seagrass bed areas with good seagrass cover (3 sample locations with 3 replicate infaunal cores and 1 sediment core at each location) -sediment areas outside of the seagrass bed and mooring scars (2 sample locations with 3 replicate infaunal cores and 1 sediment core at each location) In addition to the core data, diver observations of sediment composition, sediment features and characteristics, and epifauna have been collected for each sample location. The aims of these cores were to assess any significant difference between the infaunal communities and sediment profiles of these three habitat types.
- Dataset Reference Date (Publication)
- 2012-12-31
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
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Vertical Extent
- Medin Extent Keyword
- soil and sediment
Distribution
- Format Type and Description
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Documents
()
- Specification
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[A] Field report to Gwynedd County Council in word .doc format. This includes sample locations [B] Species and PSA data held in .xls speadsheets [C] Marine Recorder (MRCCW31700000008) NBN file and Snapshot [D] PRIMER analysis commissions by Gwynedd County
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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A total of 24 subtidal infaunal sediment cores and 8 sediment particle analysis cores have been collected from three different habitats within the area of the Porth Dinllaen seagrass bed: -mooring scar areas (3 sample locations with 3 replicate infaunal cores and 1 sediment core at each location), -seagrass bed areas with good seagrass cover (3 sample locations with 3 replicate infaunal cores and 1 sediment core at each location) -sediment areas outside of the seagrass bed and mooring scars (2 sample locations with 3 replicate infaunal cores and 1 sediment core at each location) In addition to the core data, diver observations of sediment composition, sediment features and characteristics, and epifauna have been collected for each sample location. The aims of these cores were to assess any significant difference between the infaunal communities and sediment profiles of these three habitat types.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- sediment sample
- sediment infauna
- marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments)
- seagrasses (see also potamogetonaceae and hydrocharitaceae)
- zostera
- posidoniaceae
- anchor damage
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Zoobenthos generic abundance
- Zoobenthos taxonomic abundance
- Macroalgae and seagrass infection and damage
- Sedimentary structure
- 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 2012. 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
- 4f4c4942-4343-5764-6473-313135323734 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T13:13:52.117Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0