NRW_DS115547 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 2026-03-03T14:43:47 MEDIN 3.1.2 wel eng utf8 Latitude and Longitude (EPSG::4326) Severn Estuary Special Area of Conservation (SAC) and Special Protection Area (SPA): Intertidal Mudflats and Sandflats Condition Assessment 2012 Severn Estuary Special Area of Conservation (SAC) and Special Protection Area (SPA): Intertidal Mudflats and Sandflats Condition Assessment 2012 Asesiad Cyflwr Traethellau Mwd a Thywod Rhynglanwol 2012 MRNE013700000005 - Severn Estuary SAC Sandflat and Mudflat Condition Assessment 2012 Severn Estuary SAC Sandflat and Mudflat Condition Assessment 2012 2014-12-31 publication 4f4c4942-4343-5764-6473-313135353437 The Severn Estuary is the largest example of a coastal plain estuary in the United Kingdom. It has been designated as a Special Area of Conservation (SAC) under the EU Habitats Directive, a Special Protection Area (SPA) under the Birds Directive and as a Ramsar site under the Convention on Wetlands of International Importance. The primary focus of this study relates to monitoring the intertidal mudflats and sandflats feature of the Severn Estuary SAC by assessing the relevant attributes for the purpose of condition assessment. However, monitoring of prey availability within the Severn Estuary SPA was also a secondary objective. The survey was undertaken in three blocks between the 13th October and 14th November 2012. The Severn Estuary is the largest example of a coastal plain estuary in the United Kingdom. It has been designated as a Special Area of Conservation (SAC) under the EU Habitats Directive, a Special Protection Area (SPA) under the Birds Directive and as a Ramsar site under the Convention on Wetlands of International Importance. The primary focus of this study relates to monitoring the intertidal mudflats and sandflats feature of the Severn Estuary SAC by assessing the relevant attributes for the purpose of condition assessment. However, monitoring of prey availability within the Severn Estuary SPA was also a secondary objective. The survey was undertaken in three blocks between the 13th October and 14th November 2012. 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 APEM Ltd APEM Remote Sensing, Riverview, A17 Embankement Buisness Park, Heaton Mersey, Stockport, SK4 3GN manchester@apemltd.co.uk http://www.apemltd.co.uk originator National Laboratory Service Environment Agency, Starcross Laboratory, Staplake Mount, Starcross, Exeter, Devon, EX6 8FD sarah.tancock@environment-agency.gov.uk http://natlabs.co.uk/ originator Ecospan Environmental Ltd Unit 8 Strashleigh View, Lee Mill, Devon, PL21 9GS info@ecospan.co.uk www.ecospan.co.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 Natural England Foundry House, 3 Millsands, Riverside Exchange, Sheffield, S3 8NH enquiries@naturalengland.org.uk http://www.naturalengland.org.uk/ owner notPlanned Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme aquatic fauna aquatic fauna sediment infauna subtidal sediments sediment epifauna biota theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Sediment grain size parameters theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions). no limitations otherRestrictions © CNC/NRW and © Crown copyright 2012. All rights reserved. Natural Resources Wales, AC0000849444. Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS. vector eng utf8 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision benthic boundary layer NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -3.17360183 -2.37004843 51.15146662 51.78959992 2012-10-13 2012-11-14 Natural England, CCW and Environment Agency Wales (now NRW) jointly funded a joint sediment survey of the Severn estuary in 2012. The work was done as part of a framework agreement. CCW (now NRW) are free to supply Welsh related data. Documents [A] Report in .doc and .PDF format. To be published as a CCW report [B] Marine Recorder data files (provided as part of NE snapshot) although they have also provided a copy of their full mdb file. MRNE013700000005 - Severn Estuary SAC Sandflat and Mudflat Condition Assessment 2012 [C] Photos site and substrata for each station in .jpg format [D] Macrofauna analysis, PSA and raw data in xls format [E] GIS data in native ArcGIS format (shp) and tranlsated by NRW to MapInfo format (TAB) - tracks and location sof sample locations, data and outfalls as well as habitat maps. GIS data used in the planning process are also supplied 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 methods employed within this study were largely limited to Phase II sampling that was based on Phase I biotope maps from previous studies. However, if any obviously incorrect biotope boundaries were encountered or if any notable habitats or species were observed during the course of the surveys, then records were appropriately amended. Anthropogenic influences and negative indicators were also recorded where encountered. A total of 9 littoral mudflat and sandflat sediment biotopes were identified throughout the Severn Estuary SAC and SPA during the course of the study, and their subsequent extent and distribution was mapped using GIS. At each station; - five replicate 0.01m2 cores were taken to a depth of 15 cm following ISI, Environment Agency and JNCC guidelines. A photograph of the sediment at the station and the general area was also taken. Macrofauna samples were delivered to APEM Ltd for analysis. - the depth of the Redox Potential Discontinuity (RPD) layer was determined at each station and a second core taken for sediment granulometry. The sediment samples were delivered to the National Laboratory Service (NLS) at Starcross for PSA. Previous Phase 1 biotope surveys were carried out on behalf of Natural England in 2005. Phase I surveys were also carried out on the Welsh shores between 1996 and 2005 on behalf of CCW. The specific methods used during these surveys are unknown as only the GIS map outputs are available. The methods employed within this study were largely limited to Phase II sampling that was based on Phase I biotope maps from previous studies. However, if any obviously incorrect biotope boundaries were encountered or if any notable habitats or species were observed during the course of the surveys, then records were appropriately amended. Anthropogenic influences and negative indicators were also recorded where encountered. A total of 9 littoral mudflat and sandflat sediment biotopes were identified throughout the Severn Estuary SAC and SPA during the course of the study, and their subsequent extent and distribution was mapped using GIS. At each station; - five replicate 0.01m2 cores were taken to a depth of 15 cm following ISI, Environment Agency and JNCC guidelines. A photograph of the sediment at the station and the general area was also taken. Macrofauna samples were delivered to APEM Ltd for analysis. - the depth of the Redox Potential Discontinuity (RPD) layer was determined at each station and a second core taken for sediment granulometry. The sediment samples were delivered to the National Laboratory Service (NLS) at Starcross for PSA. Previous Phase 1 biotope surveys were carried out on behalf of Natural England in 2005. Phase I surveys were also carried out on the Welsh shores between 1996 and 2005 on behalf of CCW. The specific methods used during these surveys are unknown as only the GIS map outputs are available.