Morfa Gwyllt Lagoon Soft Sediment Infauna Survey (2006 - 2012)

  • English
  • wel
  • All

Coastal lagoons are areas of shallow, coastal salt water, wholly or partially separated from the sea by sandbanks, shingle or, less frequently, rocks. Lagoons show a wide range of geographical and ecological variation; five main sub-types have been identified in the UK, on the basis of their physiography, as meeting the definition of the Annex I habitat type. Annex 1 habitat types are those habitats which are listed under the EC Habitats Directive and form part of Special Area of Conservation (SAC) interest features. Morfa Gwyllt lagoon in classed as one of these features within the Pen Llyn a`r Sarnau/ Lleyn Peninsula and the Sarnau SAC. Morfa Gwyllt lagoon is a small percolation lagoon that consists of a depression in a shingle bar across the mouth of the Afon Dysynni in mid Wales. This is the only example of a percolation lagoon in Wales. The substrate is a mosaic of medium sand over/amongst shingle, with muddier patches within the deeper pockets, and scattered larger pebbles. Three lagoonal specialists have been found at this site: the amphipod Sphaeroma hookeri, the bryozoan Conopeum seurati and the alga Chaetomorpha linum. This dataset is a collation of data from subtidal benthic soft sediment sampling carried out within Morfa Gwyllt lagoon collected to aid the monitoring and condition assessment of this Annex 1 feature.

Identification

Dynodydd
Identifier
NRW_DS110467
Teitl Amgen
Alternative Title
  • 2007-11 CCW Morfa Gwyllt lagoon survey MRCCW3000000004D
  • 2012 DRAFT CCW Morfa Gwyllt Lagoon Survey MRCCW30000000077
  • Arolwg o isfilod gwaddodion meddal Lagwn Morfa Gwyllt
  • 2007 - 09 CCW Morfa Gwyllt lagoon survey
Laith Metadata
Metadata Language
English
Lineage

Monitoring work is carried out at 10 randomly selected sample stations on each sampling visit. Infaunal sampling if invertebrates (per 0.005m2) and granulometry was carried out at each location whilst the salinity and temperature are recorded continuously. Supporting determinants are: National Grid References recorded using hand held GPS, salinity and temperature which are continuously recorded using a data logger. All samples are collected using a corer (0.005m2). Benthic invertebrate samples are sieved over a 0.5 mm mesh. A minimum of 10 random samples are carried out within the lagoon each year. There is high confidence in this datasets. Benthic invertebrate samples are processed by laboratories that are members of the National Marine Biological Analytical Quality Control (NMBAQC) scheme and random samples from each survey are also selected for audit by Unicomarine.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2012-12-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  CCW Marine Monitoring Team
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

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; soil and sediment

Maint Fertigol
Vertical Extent

Gwerth lleiaf
Minimum value (metres)
0
Gwerth uchaf
Maximum value (metres)
-0.7
System Gyfeirio Cydlynu Fertigol
Vertical CRS
 
 

Distribution

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

    Specification

    [A] Sample stations (metadata) held as MapInfo GIS layers. [B] Species data and particle size analysis data are held as excel spreadsheets and have also been imported to Marine Recorder (MRCCW3000000004D). [C] Temperature and salinity data held as raw file and Excel spreadsheets.

 

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

Monitoring work is carried out at 10 randomly selected sample stations on each sampling visit. Infaunal sampling if invertebrates (per 0.005m2) and granulometry was carried out at each location whilst the salinity and temperature are recorded continuously. Supporting determinants are: National Grid References recorded using hand held GPS, salinity and temperature which are continuously recorded using a data logger. All samples are collected using a corer (0.005m2). Benthic invertebrate samples are sieved over a 0.5 mm mesh. A minimum of 10 random samples are carried out within the lagoon each year. There is high confidence in this datasets. Benthic invertebrate samples are processed by laboratories that are members of the National Marine Biological Analytical Quality Control (NMBAQC) scheme and random samples from each survey are also selected for audit by Unicomarine.
 

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
  • sediment infauna
  • sediment sample
  • sediments
  • benthic communities
  • benthic species
  • lagoons
  • Infauna
  • salinity
  • Temperature
  • temperature loggers
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
  • Salinity of the water column
  • Temperature of the water column
  • Zoobenthos generic abundance
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 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 2008. 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
4f4c4942-4343-5764-6473-313130343637 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Macrofaunal Community Monitoring on Saline Lagoons across Wales

NRW_DS116511
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:41:09.968Z
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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