4f4c4942-4343-5764-6473-313135353935 English NRW_DS110194 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2025-03-07T17:24:27.455Z NRW 1.0 wel British National Grid (EPSG::27700) Special Area of Conservation (SAC) Monitoring: Freshwater Pearl Mussel on the Afon Eden cSAC (2003 and 2011) Special Area of Conservation (SAC) Monitoring: Freshwater Pearl Mussel on the Afon Eden cSAC (2003 and 2011) Arolygu ACA: Arolygu Cregyn Gleision Perlog Dwr Croyw yn Narpar-ardal Cadwraeth Arbennig Afon Eden 2012-03-31 NRW_DS115595 Freshwater Pearl mussels are protected under national and international legislations. Afon Eden Special Area of Conservation (SAC) is the only site in Wales where pearl mussel forms the primary reason for selection of the Special Area of Conservation. The data forms part of ongoing monitoring of this site. The Afon Eden was surveyed to assess the current population status of Freshwater Pearl Mussel compared to that of a previous survey in 1997. The aim of this project was to undertake monitoring of the freshwater pearl mussel on the Afon Eden candidate (SAC) in order to be able to report on the condition as a requirement of the EC Habitats and Species Directive. There have been two monitoring cycles since the work in 1997, both in 2003 and 2011. The only data held for monitoring undertaken in 2003 are photographs taken of the site. Freshwater Pearl mussels are protected under national and international legislations. Afon Eden Special Area of Conservation (SAC) is the only site in Wales where pearl mussel forms the primary reason for selection of the Special Area of Conservation. The data forms part of ongoing monitoring of this site. The Afon Eden was surveyed to assess the current population status of Freshwater Pearl Mussel compared to that of a previous survey in 1997. The aim of this project was to undertake monitoring of the freshwater pearl mussel on the Afon Eden candidate (SAC) in order to be able to report on the condition as a requirement of the EC Habitats and Species Directive. There have been two monitoring cycles since the work in 1997, both in 2003 and 2011. The only data held for monitoring undertaken in 2003 are photographs taken of the site. 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 Killeen 163 High Road West, Felixstowe, Suffolk, IP11 9BD iankilleen@eircom.net <!__ Nowebsite __!> 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=/ Environment Agency Wales Environment Agency Wales, Cambria House, 29 Newport Road, Cardiff, CF24 0TP enquiries@environment-agency.gov.uk http://www.environment-agency.gov.uk/regions/wales Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme pearl mussels margaritifera margaritifera freshwater molluscs freshwater fauna Afon Eden candidate Special Area of Conservation (cSAC) Special Areas of Conservation (SAC) - SAC monitoring NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml 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 Part of this dataset is sensitive and restricted as it contains data exempt from general release under EIR. Sensitive data must be kept confidential; general release is not permitted due to risk of harm to the environment or third parties. no limitations © CNC/NRW Data may be re-used under provision and in line with the terms of a NRW licence and NRWs guidance on Ecological data exempt from general release. English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 GWYNEDD - GWYNEDD -3.96034865 -3.85450039 52.72175576 52.90931967 2003-07-06 2011-07-11 Freshwater pearl mussel margaritifera margaritifera monitoring report Afon Eden - Cors Goch Trawsfynydd SAC 2011 Monitoring of the freshwater pearl mussel on the Afon Eden candidate special area of conservation Documents 2003 Monitoring; [A] The final report in Microsoft Word and Adobe PDF Formats. [B] A set of images produced in JPEG format [C] Further data is available on CD's with the Monitoring and Surveillance Team Leader. 2011 Monitoring; [A] The final report in Microsoft Word and Adobe PDF formats. [B] Raw data workbook in excel format containing all sample species and habitat information and sample metadata [C] A full set of maps produced in JPEG format. [D] A series of GIS layers on which the maps in the report are based in MapInfo format. [E] A full set of images produced in JPEG format (To be supplied 2012-01-10) [F] Field survey forms are stored in hardcopy 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 This project follows on from a baseline survey of the Afon Eden in 1997. Monitoring of the condition for each candidate Special Area of Conservation (cSAC) feature follows the Common Standards approach outlined by the Joint Nature Conservation Committee, as implemented by CCW. An initial assessment of the LIFE Protocol was carried out based on the results of the 1997 survey and a brief re-survey of selected sections of river. This assessment principally focused on establishing the mussel population density and distribution. These collected data were then used to determine whether the protocol was applicable to the Afon Eden. In 2003 eleven fixed monitoring transects were established within different sections of the river. Transects were repeat monitored in 2011. The protocol recommends that rivers with known mussel populations should be assessed by 50 m long, 1 m wide transects. The criteria includes a total mussel count, or estimate (if the number is >250); a detailed search of five 1m2 quadrats that includes invasive sampling for juveniles; measurement of 150 randomly chosen individuals; environmental features - substrate, algal cover, bankside vegetation, flow characteristics and other factors (e.g. evidence of pearl fishing, sheep dip etc). This project follows on from a baseline survey of the Afon Eden in 1997. Monitoring of the condition for each candidate Special Area of Conservation (cSAC) feature follows the Common Standards approach outlined by the Joint Nature Conservation Committee, as implemented by CCW. An initial assessment of the LIFE Protocol was carried out based on the results of the 1997 survey and a brief re-survey of selected sections of river. This assessment principally focused on establishing the mussel population density and distribution. These collected data were then used to determine whether the protocol was applicable to the Afon Eden. In 2003 eleven fixed monitoring transects were established within different sections of the river. Transects were repeat monitored in 2011. The protocol recommends that rivers with known mussel populations should be assessed by 50 m long, 1 m wide transects. The criteria includes a total mussel count, or estimate (if the number is >250); a detailed search of five 1m2 quadrats that includes invasive sampling for juveniles; measurement of 150 randomly chosen individuals; environmental features - substrate, algal cover, bankside vegetation, flow characteristics and other factors (e.g. evidence of pearl fishing, sheep dip etc).