Intertidal Monitoring of Muddy Gravel, Sediments and Rocky Shore in Pen Llyn a'r Sarnau Special Area of Conservation (SAC) 2008

Pen Llyn a'r Sarnau Special Area of Conservation (SAC) is designated for five Annex 1 habitats and four subsidiary ones. The major features of intertidal interest are Estuaries and their constituent mudflats, sandflats and reefs, Large shallow inlets and bays with intertidal Zostera beds, populations of the shingle dwelling amphipod Pectenogammarus, piddocks in clay and lower shore boulder communities and Reefs, particularly biogenic reefs of Sabellaria alveolata. Specific areas of interest for are the intertidal sediments and rocky areas in the Glaslyn and Dwyryd Estuaries. There were two purposes for this data capture. The first was related to sediments. Sediment data was collected to test monitoring methodology, establish sites for long term monitoring and collect baseline and reference data. The second was related to the Data collected on the rocky shore to establish sand levels at key rocky areas - Port Meirion, Ynys Gifftan and Cei Ballast.

Identifier: NRW_DS115065

Alternative Title

Arolwg rhynglanw o Raean Lleidiog, Gwaddod a Glan Mor Creigiog y ACA Pen Llyn a'r Sarnau 2008
2008 CCW / ASML Pen Llyn a'r Sarnau SAC Dwyryd/Glaslyn MRCCW1630000000E

Metadata Language: English

Lineage: In situ recording of sediment characteristics were undertaken across the whole area of the sediment flats. This data capture included epibiota, infauna and granulometry sampling. A collection of samples from ten stations were then analysed in the laboratory for infauna and sediment granulometry. Quadrat recording on three rocky shores was undertaken. One muddy gravel habitat site was visited at Carreg y Defaid but the tide failed to expose enough of the bank to allow a detailed survey. A species list was generated and some specimens were collected for identification. Data quality and confidence was considered high, as all surveys were completed by professional and experienced marine field surveyors. The methodology for the in situ grid stations was an adaptation of Phase I survey techniques developed for an earlier survey of the Mawddach Estuary (Wyn and Cooke, 2001). Monitoring was also previously carried out in 2007. All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high.

Dataset Reference Date (Publication): 2010-10-31

Temporal Extent

Begin date: 2008-10-18

End date: 2008-10-20

Topic category

Biota

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). Marine and Freshwater Ecosystems Group

Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://www.ccw.gov.uk

Originator

Aquatic Survey and Monitoring Ltd (ASML)

Whitfield Brow, Bollihope, Frosterley, Weardale, Co. Durham, DL13 2SZ, England

http://www.marineseen.com/aquatic_survey_and_monitoring.htm

Extent

Geographic Extent: GWYNEDD - GWYNEDD

Vertical Extent

Medin Extent Keyword: benthic boundary layer

Format Type and Description

Documents Documents ()

Specification

[A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] MapInfo GIS layer in MapInfo Native format (Tables): - Position of the sample stations. [C] Excel spreadsheets with station details and species data [D] Photographs of the stations [E] Marine Recorder file[MRCCW1630000000E]

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: In situ recording of sediment characteristics were undertaken across the whole area of the sediment flats. This data capture included epibiota, infauna and granulometry sampling. A collection of samples from ten stations were then analysed in the laboratory for infauna and sediment granulometry. Quadrat recording on three rocky shores was undertaken. One muddy gravel habitat site was visited at Carreg y Defaid but the tide failed to expose enough of the bank to allow a detailed survey. A species list was generated and some specimens were collected for identification. Data quality and confidence was considered high, as all surveys were completed by professional and experienced marine field surveyors. The methodology for the in situ grid stations was an adaptation of Phase I survey techniques developed for an earlier survey of the Mawddach Estuary (Wyn and Cooke, 2001). Monitoring was also previously carried out in 2007. All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high.

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

intertidal
mudflats
sandflats
rocky reef
estuarine rock
Glaslyn Dwyryd estuary
biotopes

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary

Macroalgae and seagrass taxonomy-related counts
Zoobenthos taxonomy-related counts
Habitat characterisation

Type: Theme

Citation

Date (Revision): 2021-01-06

Code: geonetwork.thesaurus.external.theme.rdf+xml

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: Across Wales intertidal SAC monitoring Pen Llyn a'r Sarnau SAC : August 2008

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

File Identifier: 4f4c4942-4343-5764-6473-313135303635 XML

Metadata Language: English

Parent Identifier: Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501

Resource type: Dataset

Metadata Date: 2024-05-31T09:39:39.501Z

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

Access the portal

Full access to the portal and metadata.

Intertidal Monitoring of Muddy Gravel, Sediments and Rocky Shore in Pen Llyn a'r Sarnau Special Area of Conservation (SAC) 2008

Identification

Temporal Extent

Extent

Extent

Vertical Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body