4f4c4942-4343-5764-6473-313132343132 English NRW_DS111816 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T12:00:49.674Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Subtidal Habitat Diversity Layer (2010) Subtidal Habitat Diversity Layer (2010) Cyngor Cefn Gwlad Cymru 2010, Haen amrywiaeth cynefinoedd islanwol subtidal_non_neighbourhood_biotope 2010-03-31 NRW_DS112412 This layer was produced for Countryside Council for Wales (CCW) as part of the 'Identifying Marine Biodiversity Hotspots in Wales' project. Habitat diversity in the range is measured using biotope richness, biotope distinctness and the number of Biodiversity Action Plan priority features metrics. A hexagonal grid with a resolution of 1 km is used to present these metrics. The purpose of this data capture was to establish subtidal diversity from known data around the Welsh coastline, from mean high water to 12 nautical miles offshore. An assessment of the suitability of data was carried out, taking into account the source of the data, its age, spatial, taxonomic and methodological accuracy. Data were also graded on survey quality using the following three categories with respect to field surveyors: professional and academic; volunteer with expert ID; and volunteer. Derived confidence ratings were recorded in the metadata and low quality data were flagged and removed from subsequent analyses. This layer was produced for Countryside Council for Wales (CCW) as part of the 'Identifying Marine Biodiversity Hotspots in Wales' project. Habitat diversity in the range is measured using biotope richness, biotope distinctness and the number of Biodiversity Action Plan priority features metrics. A hexagonal grid with a resolution of 1 km is used to present these metrics. The purpose of this data capture was to establish subtidal diversity from known data around the Welsh coastline, from mean high water to 12 nautical miles offshore. An assessment of the suitability of data was carried out, taking into account the source of the data, its age, spatial, taxonomic and methodological accuracy. Data were also graded on survey quality using the following three categories with respect to field surveyors: professional and academic; volunteer with expert ID; and volunteer. Derived confidence ratings were recorded in the metadata and low quality data were flagged and removed from subsequent analyses. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Countryside Council for Wales (CCW) Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ Joint Nature Conservation Committee (JNCC) Monkstone House, City Road, Peterborough, PE1 1JY, England comment@jncc.gov.uk http://www.jncc.gov.uk/ Marine Life Information Network (MarLIN) The Marine Biological Association of the UK, Citadel Hill, Plymouth, Devon, PL1 2PB Not available http://www.marlin.ac.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme marine (maritime) marine conservation (see also specific geographical areas or sites eg Skomer-marine protected areas,marine nature reserves) marine habitat habitats (see also specific types of habitats) biotopes diversity Subtidal geographical information systems (GIS) NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Habitat extent SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml biodiversity Integrated Public Sector Vocabulary 2013-04-03 geonetwork.thesaurus.external.theme.subjects NRW SMNR Vocabulary 2023-12-27 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © 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. English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -5.995534 -2.377414 51.160228 53.635782 1968-01-01 2008-12-31 Mapping marine benthic biodiversity in Wales Geographic Information System MapInfo layers 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 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Biotope information for subtidal habitats was collated from the Countryside Council for Wales (CCW) and the National Biodiversity Network (NBN) Gateway (Marine Recorder Snapshot), the MarLIN databases and the Data Archive for Seabed Species and Habitats data (DASSH). Biotope codes were matched against EUNIS codes. Biotopes in 97.06 format were manually matched to 04.05 biotopes prior to EUNIS translation and in some instances where the code could not be accurately matched to the same level, and a higher level code was assigned. A hexagonal grid was used because they offer the best alignment to complex features, such as the Welsh coastline. The optimal size was determined 20km2 for the subtidal region. Metrics used to represent marine biodiversity in Wales were biotope richness, biotope distinctness and the number of priority features. Each measure was calculated for each broad sampling method type, re-combined by hexagon, and presented as a separate layer on a continuous scale. Biotope information for subtidal habitats was collated from the Countryside Council for Wales (CCW) and the National Biodiversity Network (NBN) Gateway (Marine Recorder Snapshot), the MarLIN databases and the Data Archive for Seabed Species and Habitats data (DASSH). Biotope codes were matched against EUNIS codes. Biotopes in 97.06 format were manually matched to 04.05 biotopes prior to EUNIS translation and in some instances where the code could not be accurately matched to the same level, and a higher level code was assigned. A hexagonal grid was used because they offer the best alignment to complex features, such as the Welsh coastline. The optimal size was determined 20km2 for the subtidal region. Metrics used to represent marine biodiversity in Wales were biotope richness, biotope distinctness and the number of priority features. Each measure was calculated for each broad sampling method type, re-combined by hexagon, and presented as a separate layer on a continuous scale.