NRW_DS110467 eng NRW_DS116511 dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T16:06:51 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Morfa Gwyllt Lagoon Soft Sediment Infauna Survey (2006 - 2012) Morfa Gwyllt Lagoon Soft Sediment Infauna Survey (2006 - 2012) Arolwg o isfilod gwaddodion meddal Lagwn Morfa Gwyllt 2007-11 CCW Morfa Gwyllt lagoon survey MRCCW3000000004D 2012 DRAFT CCW Morfa Gwyllt Lagoon Survey MRCCW30000000077 2007 - 09 CCW Morfa Gwyllt lagoon survey 2012-12-31 publication 4f4c4942-4343-5764-6473-313130343637 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. 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. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian CCW Marine Monitoring Team Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en publisher annually Species distribution theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme salinity sediment infauna lagoons benthic communities Temperature sediment sample benthic species marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments) Infauna temperature loggers theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Salinity of the water column Zoobenthos generic abundance Temperature of the water column theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. vector eng utf8 oceans biota NRW Geographic Identifiers Collection 2024-01-01 publication GWYNEDD - GWYNEDD -4.12089955 -4.11931635 52.60496661 52.60588927 SeaVoX Vertical Co-ordinate Coverages 2013-02-05 creation soil and sediment boundary layer 2007-01-01 2012-12-31 0 -0.7 Database [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. dataset 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 2010-12-08 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false 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. S upporting 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. 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. S upporting 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.