Special Area of Conservation (SAC) Monitoring: Freshwater Pearl Mussel on the Afon Eden cSAC (2003 and 2011)

  • English
  • wel
  • All

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.

Identification

Dynodydd
Identifier
NRW_DS115595
Teitl Amgen
Alternative Title
  • Arolygu ACA: Arolygu Cregyn Gleision Perlog Dwr Croyw yn Narpar-ardal Cadwraeth Arbennig Afon Eden
Laith Metadata
Metadata Language
English
Lineage

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).
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2012-03-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Killeen
163 High Road West, Felixstowe, Suffolk, IP11 9BD
<!__ Nowebsite __!>
Cychwynnwr
Originator
  Countryside Council for Wales (CCW)
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Cychwynnwr
Originator
  Environment Agency Wales
Environment Agency Wales, Cambria House, 29 Newport Road, Cardiff, CF24 0TP
http://www.environment-agency.gov.uk/regions/wales
 

Extent

Extent

Hyd
Geographic Extent
GWYNEDD - GWYNEDD
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ()

    Specification

    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

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
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
Explanation
Degree
false
Lineage

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).
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • pearl mussels
  • margaritifera margaritifera
  • freshwater molluscs
  • freshwater fauna
  • Afon Eden
  • candidate Special Area of Conservation (cSAC)
  • Special Areas of Conservation (SAC) - SAC monitoring
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Freshwater pearl mussel margaritifera margaritifera monitoring report Afon Eden - Cors Goch Trawsfynydd SAC 2011
NRW Related Title

Monitoring of the freshwater pearl mussel on the Afon Eden candidate special area of conservation
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

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.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© 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.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313135353935 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Condition monitoring of Special Areas of Conservation (SACs) in Wales

NRW_DS110194
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:43:53.734Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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