NRW_DS114722 eng dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T14:27:54 MEDIN 3.1.2 wel eng utf8 Latitude and Longitude (EPSG::4326) Seabirds at Sea Evidence Base Seabirds at Sea Evidence Base Adar mor sylfaen tystiolaeth WWT and ESAS combined seabirds at sea Collated seabird distribution and abundance data in Welsh waters Seabird coverage 3KM WGS84.lyr Seabird WWT ESAS merged flying 3KM WGS84.lyr Seabird WWT ESAS merged sitting 3KM WGS84.lyr 2010-07-01 publication 4f4c4942-4343-5764-6473-313134373232 GIS layers showing the abundance and distribution of seabirds in welsh waters. The datasets consists of the raw data showing observations of all seabirds and derived grids showing the density of flying and sitting species on a 3km grid scale and the survey coverage. The purpose of this data capture was to collate data from ESAS and WWT Consulting databases to produce combined database of birds recorded from surveys of Welsh waters. Other sources identified were also consulted to produce the most complete representation of the observed distribution of seabirds. GIS layers showing the abundance and distribution of seabirds in welsh waters. The datasets consists of the raw data showing observations of all seabirds and derived grids showing the density of flying and sitting species on a 3km grid scale and the survey coverage. The purpose of this data capture was to collate data from ESAS and WWT Consulting databases to produce combined database of birds recorded from surveys of Welsh waters. Other sources identified were also consulted to produce the most complete representation of the observed distribution of seabirds. Haenau SGDd (GIS) yn dangos helaethrwydd a dosbarthiad adar môr yn nyfroedd Cymru. Mae’r set ddata’n cynnwys data crai sy’n dangos arsylwadau’n ymwneud â’r holl adar môr a’r gridiau a grëwyd lle y dangosir dwysedd y rhywogaethau sy’n hedfan ac yn eistedd ar raddfa grid 3 cilometr a chwmpas yr arolwg. Pwrpas y gwaith cipio data hwn oedd coladu data o gronfeydd ESAS a WWT Consulting er mwyn cynhyrchu cronfa ddata gyfunol o adar a gofnodwyd mewn arolygon o ddyfroedd Cymru. Cydnabyddiaeth: Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Hawl Cronfa Ddata. Cedwir pob hawl. 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 Wildfowl And Wetlands Trust (WWT) Wildfowl and Wetlands Trust (WWT), Slimbridge, Gloucestershire, GL2 7BT, England consulting@wwt.org.uk http://www.wwt.org.uk/ originator Joint Nature Conservancy Committee (JNCC) Joint Nature Conservancy Committee (JNCC), Monkstone House, City Road, Peterborough, PE1 1JY n/a http://www.jncc.gov.uk originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Species distribution theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme abundance European Seabirds at Sea (ESAS) seabirds (see also specific species)(see also shorebirds) Wildfowl and Wetlands Trust (WWT) sitting distributions theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Bird taxonomy-related abundance per unit area of surface theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml Birds Flying theme IPSV Subjects List 2020-11-18 publication geonetwork.thesaurus.external.theme.subjects Ecosystem (SMNR) Natural Resources (Incl. Features and Processes) (SMNR) Sea and Coast (SMNR) Animals, Plants and Other Organisms (SMNR) Management Areas (SMNR) Marine (SMNR) Coastal Margins (SMNR) Sustainable Management of Natural Resources (SMNR) theme NRW SMNR Keywords 2024-06-26 publication geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords otherRestrictions There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © 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. Attribution statement: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence vector 3000 eng utf8 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision troposphere NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -6.04366756 -2.09400654 51.02753754 53.9093782 1980-08-08 2009-08-07 Geographic Information System Unknown Data exists as MapInfo GIS layers and in it's native ArcGIS format https://datamap.gov.wales/layergroups/inspire-nrw:SeabirdsAtSea WWW:LINK-1.0-http--link Download Data and Web Services information https://datamap.gov.wales/capabilities/layergroup/882/?ows_service=wms OGC:WMS Web Mapping Service information 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 The two main sources of seabird distribution and abundance data for welsh waters are held in JNCC's European Seabirds at Sea (ESAS) database and the Wildfowl and Wetlands (Consulting) Ltd marine aerial surveys database. A collation for Wales was created by producing a database containing all the fields from both datasets. This was then populated. The data was 'cleaned' to remove non-bird objects and data. A GIS layer was produced and supplied from the database. Density and abundance maps as well as survey coverage were derived from the database using a 3km by 3km grid created in ArcGIS. A detailed methodology and the approach taken is described in the WWT Report "Collating seabird distribution and abundance data in Welsh waters to support provision of strategic advice on the relative risk of deployment of tidal stream devices". Originally the density maps were produced to provide evidence about mobile species and their sensitivity to tidal stream devices (See NRW project 309 media 1230). This dataset is an update based on the same methodology but includes all gull species which were not required for the renewables work. The selection of the highest value from the combined JNCC ESAS and WWT datasets for each grid cell is in line with the Precautionary Principle. This may lead to an overestimation of abundance in some grid cells but will reflect the highest potential use of each cell by diving bird species. In addition diving bird density values for each grid cell were standardised according to survey effort so that those grid cells for which there is a very low level of effort may have an overestimation of overall abundance. It is important to interpret these evidence layers in conjunction with information on the underlying survey effort. The two main sources of seabird distribution and abundance data for welsh waters are held in JNCC's European Seabirds at Sea (ESAS) database and the Wildfowl and Wetlands (Consulting) Ltd marine aerial surveys database. A collation for Wales was created by producing a database containing all the fields from both datasets. This was then populated. The data was 'cleaned' to remove non-bird objects and data. A GIS layer was produced and supplied from the database. Density and abundance maps as well as survey coverage were derived from the database using a 3km by 3km grid created in ArcGIS. A detailed methodology and the approach taken is described in the WWT Report "Collating seabird distribution and abundance data in Welsh waters to support provision of strategic advice on the relative risk of deployment of tidal stream devices". Originally the density maps were produced to provide evidence about mobile species and their sensitivity to tidal stream devices (See NRW project 309 media 1230). This dataset is an update based on the same methodology but includes all gull species which were not required for the renewables work. The selection of the highest value from the combined JNCC ESAS and WWT datasets for each grid cell is in line with the Precautionary Principle. This may lead to an overestimation of abundance in some grid cells but will reflect the highest potential use of each cell by diving bird species. In addition diving bird density values for each grid cell were standardised according to survey effort so that those grid cells for which there is a very low level of effort may have an overestimation of overall abundance. It is important to interpret these evidence layers in conjunction with information on the underlying survey effort.