• {'logoName' | translate} NRW Data Discovery

Pearl Mussel Distribution for Habitats Directive (Council Directive 92/43/EEC) Reporting under Article 17

This dataset comprises of a collation of records of pearl mussels from Welsh rivers. This dataset is a compilation of numerous records from different sources complied for Habitats Directive Article 17 reporting, related to freshwater pearl mussels Margaritifera margaritifera. Every six years, Member States of the European Union are required (by Article 17 of the Directive) to report on implementation of the Habitats Directive. The reporting format set by the European Commission requires a separate analysis for each species and each habitat in each biogeographic region which that country covers. This dataset comprises of Environment Agency and Countryside Council for Wales surveys. The aim of this collation has been to ensure that the 10 km distribution maps on the NBN accurately reflect the known position of this species. Records have been compiled with this in mind and hence no attempt has been made to collate every single record for each 10km square within the designated time period.

  • Identification
  • Extent
  • Distribution
  • Quality
  • Keywords
  • Spatial Reference System
  • Content
  • Constraints
  • Maintenance
  • Metadata

Identification

Identifier
NRW_DS116443
Alternative Title
  • Dosbarthiad Misglod Perlog ar gyfer adroddiadau’r Gyfarwyddeb Cynefinoedd (Cyfarwyddeb y Cyngor 92/43/EEC) dan Erthygl 17
  • Pearl Mussel distribution, Wales (2004-2012)
Metadata Language
English
Lineage

Surveys have been undertaken as part of monitoring programmes and Wales-wide distribution surveys. Records are taken from CCW’s biological database and the Environment Agency (Wales) GIS system and relate to in-house and contracted surveys of Welsh rivers carried out in the past eight years. Surveys have been undertaken as part of monitoring programmes and Wales-wide distribution surveys. The majority of records in this dataset are collated with six or eight figure grid-references, although where surveys have reported on individual river sections then four-figure references may have been used. The dataset represents the distribution of the pearl mussel across Wales during the data capture period.

Additional Information

Most have an exact date but some are in the following format MM-YYYY or YYYY only.

Dataset Reference Date (Publication)
2012-06-30
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Countryside Council for Wales (CCW) -
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Originator
  Environment Agency Wales (EA Wales) -
Cambria House, 29 Newport Road, Cardiff, CF24 0TP, Wales
www.environment-agency.gov.uk
 

Extent

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Distribution

Format Type and Description
  • Documents ( )

    Specification

    Excel spreadsheet available to download from NBN Gateway

Resource Locator
View and Download Data

World Wide Web page

 

Quality

Data quality

Quality Scope
Dataset
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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.

Degree
false
Lineage

Surveys have been undertaken as part of monitoring programmes and Wales-wide distribution surveys. Records are taken from CCW’s biological database and the Environment Agency (Wales) GIS system and relate to in-house and contracted surveys of Welsh rivers carried out in the past eight years. Surveys have been undertaken as part of monitoring programmes and Wales-wide distribution surveys. The majority of records in this dataset are collated with six or eight figure grid-references, although where surveys have reported on individual river sections then four-figure references may have been used. The dataset represents the distribution of the pearl mussel across Wales during the data capture period.

 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
  • Habitats and biotopes
  • Species distribution
Type
Theme

Citation

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

Keywords

NRW Thesaurus

  • FRESHWATER
  • freshwater biology
  • National Biodiversity Network [NBN]
  • Habitats Directive (Directive 92/43/EEC) (EC Habitats Directive) (European Community Habitats Directive)
  • NBN Atlas
  • margaritifera margaritifera
  • pearl mussels
Type
Theme

Citation

Date (Publication)
2026-03-04
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

NRW SMNR Keywords

  • Ecosystem (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
  • Freshwater and Wetlands (SMNR)
  • Animals, Plants and Other Organisms (SMNR)
  • Management Areas (SMNR)
  • Water Quality (SMNR)
Type
Theme

Citation

Date (Publication)
2024-06-26
Code
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

Part of this dataset is sensitive and restricted. The sensitive data is as follows - location of Pearl Mussels. Sensitive data must be kept confidential; general release is not permitted due to risk of harm to the environment or third parties. Sensitive data may only be released under an appropriate NRW Licence. Requests should be referred to NRW's Data Distribution Team. Data may be released freely if the sensitive records are removed in advance, or shown only at a coarser scale.

 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW 2008 Recipients may only re-use sensitive data in strict confidence under the terms of an appropriate NRW Licence or equivalent. No publication or dissemination is permitted, except if sensitive records are removed in advance, or shown only at a coarser scale. At a spatial scale at which the records are considered non-sensitive then there are no use restrictions on this data, including for commercial and research purposes. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.

 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313136343433 XML
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Species Data on the NBN Atlas

NRW_DS116805

Resource type
Dataset
Metadata Date
2026-06-26T08:18:55.274Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

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

Publishing Body

Access the portal
Full access to the portal and metadata.


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