Intertidal Monitoring Pen Llyn a’r Sarnau Special Area of Conservation (SAC) 2013

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  • wel
  • All

Pen Llyn a’r Sarnau Special Area of Conservation (SAC) is designated for its 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 intertidal clay and lower shore boulder communities and reefs, particularly the biogenic reefs of Sabellaria alveolata. These features are monitored by ASML on behalf of Natural Resources Wales (NRW), which has a statutory duty to produce advice under Regulation 35 (formerly Regulation 33) of the Habitats Regulations 1994. This dataset is a compilation of a number of intertidal research and monitoring programmes conducted in 2013. This included, intertidal surveying of the honeycomb reef worm Sabellaria alveolata at West Afon Dwyfor and Llandanwg; the surveying of the population status of Pectenogammarus populations (LGS.Pec), a scarce, shingle shore specific amphipod found near Pwllheli; sediment analyses of biotopes of the Dyfi and Glaslyn/Dwyryd estuaries were conducted, and subsequently the Glaslyn/Dwyryd infaunal samples were analysed; and finally a species list was created using fixed monitoring quadrats in the upper, mid and lower shore at Porth Oer, the results of which were compared to 2012 survey results.

Identification

Dynodydd
Identifier
NRW_DS116508
Teitl Amgen
Alternative Title
  • Monitro rhynglanwol Ardal Cadwraeth Arbennig (ACA) Pen Llŷn a’r Sarnau 2013
Laith Metadata
Metadata Language
English
Lineage

A number of surveying techniques were used: - Intertidal reefs, characterised by biogenic reef formed by the honeycomb reef worm Sabellaria alveolata were surveyed at West Afon Dwyfor and Llandanwg with multiple quantitative quadrats. - Pectenogammarus populations (LGS.Pec), a scarce, shingle shore specific amphipod, was surveyed near Pwllheli and its abundance compared to previous years. - The sediment biotopes of the Dyfi & Glaslyn/Dwyryd estuaries were surveyed both qualitatively and quantitatively respectively. - The Dyfi sediment biotopes were assessed qualitatively in situ and quantitatively. - The Glaslyn/Dwyryd quantitative infaunal samples were analysed and a range of univariate community statistics were calculated. - The fixed monitoring quadrats in the upper, mid and lower shore stations at Porth Oer were surveyed and compared to 2012’s results. A species list was produced for the fixed monitoring quadrats.
Additional Information

Mercer, T.S. 2016. Intertidal monitoring, Pen Llyn a’r Sarnau SAC August 2013. NRW Evidence Report No. 58, pp 68 + x, Aquatic Survey & Monitoring Ltd. Harehope Quarry, Co. Durham.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2016-03-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
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

Extent

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


 

Vertical Extent

Medin Extent Keyword

water column boundary layer; water column; unknown
 
 

Distribution

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

    Specification

    Sabellaria Quadrat Data: [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 - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheets with station details and species data [D] Photographs of the stations [E] Marine Recorder file Porth Oer Bedrock Data: [A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] Excel spreadsheets with species data from quadrat surveys. [C] Photographs of the quadrats. [D] Marine Recorder file. Dwyryd/Glaslyn sediment Data: [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 - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheets with station details and species data [D] Photographs of the stations [E] Marine Recorder file Dyfi sediment data: [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 - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheets with station details and species data [D] Photographs of the stations [E] Marine Recorder file

 

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

A number of surveying techniques were used: - Intertidal reefs, characterised by biogenic reef formed by the honeycomb reef worm Sabellaria alveolata were surveyed at West Afon Dwyfor and Llandanwg with multiple quantitative quadrats. - Pectenogammarus populations (LGS.Pec), a scarce, shingle shore specific amphipod, was surveyed near Pwllheli and its abundance compared to previous years. - The sediment biotopes of the Dyfi & Glaslyn/Dwyryd estuaries were surveyed both qualitatively and quantitatively respectively. - The Dyfi sediment biotopes were assessed qualitatively in situ and quantitatively. - The Glaslyn/Dwyryd quantitative infaunal samples were analysed and a range of univariate community statistics were calculated. - The fixed monitoring quadrats in the upper, mid and lower shore stations at Porth Oer were surveyed and compared to 2012’s results. A species list was produced for the fixed monitoring quadrats.
 

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
  • marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
  • marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments)
  • marine ecology (intertidal ecology)(subtidal ecology) (littoral communities) (intertidal habitat)(see also seashore)
  • Intertidal monitoring
  • seashore (intertidal) (littoral) (see also beaches)
  • marine wildlife (marine fauna)(marine flora)(intertidal fauna)(see also marine species,marine algae,marine mammals
  • marine surveys (intertidal & subtidal surveys) (littoral survey) (sublittoral surveys) (bathymetric survey) (see also marine monitoring and MNCR)
  • intertidal
  • sabellaria spinulosa
  • ross worm
  • sabellaria alveolata
  • polychaete worms
  • honeycomb worm
  • biotopes
  • sediment infauna
  • Infauna
  • mudflats
  • sandflats
  • estuarine rock
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 extent
  • Habitat characterisation
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

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 on 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 Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313136353038 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Across Wales Intertidal Monitoring Survey

NRW_DS109834
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:27:31.043Z
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

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