• {'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.

  • Dull adnabod
  • Rhychwant
  • Dosbarthiad
  • Ansawdd
  • Allweddeiriau
  • System Cyfeirio Gofodol
  • Cynnwys
  • Cyfyngiadau
  • Cynnal a chadw
  • Metadata

Dull adnabod

Dynodydd
NRW_DS116443
Teitl Amgen
  • Dosbarthiad Misglod Perlog ar gyfer adroddiadau’r Gyfarwyddeb Cynefinoedd (Cyfarwyddeb y Cyngor 92/43/EEC) dan Erthygl 17
  • Pearl Mussel distribution, Wales (2004-2012)
Laith Metadata
English
Datganiad

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.

Gwybodaeth ychwanegol

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

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

Rhychwant

Rhychwant

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


 
 

Dosbarthiad

Dosbarthiad

Fformat - Math a Disgrifiad
  • Documents ( )

    Math

    Excel spreadsheet available to download from NBN Gateway

Lleolwr Adnoddau
View and Download Data

World Wide Web page

 

Ansawdd

Ansawdd Data

Cwmpas Ansawdd
Dataset
Cydymffurfiad
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
Eglurhad

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

Gradd
false
Datganiad

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.

 

Allweddeiriau

Allweddair

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

Dyfyniad

Dyddiad (Cyhoeddiad)
2008-06-01
Cod
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair

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
Math
Theme

Dyfyniad

Dyddiad (Cyhoeddiad)
2026-03-04
Cod
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair

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)
Math
Theme

Dyfyniad

Dyddiad (Cyhoeddiad)
2024-06-26
Cod
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

System Cyfeirio Gofodol

Cod
British National Grid (EPSG::27700)
 

Cynnwys

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

 

Cyfyngiadau

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Math o Gyfyngiad
Other restrictions
 

Cyfarwyddeb Cyfyngiadau Mynediad

Cyfyngiadau
no limitations
 

Testun cyfyngiadau mynediad

Cyfyngiadau eraill

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.

 

Defnyddiwch gyfyngiadau

Cyfyngiadau Defnyddio
Other restrictions
Cyfyngiadau eraill

© 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

Dynodydd Ffeil
4f4c4942-4343-5764-6473-313136343433 XML
Laith Metadata
English
Dynodydd Rhiant
Natural Resources Wales (NRW) Species Data on the NBN Atlas

NRW_DS116805

Math o adnodd
Dataset
Dyddiad Metadata
2026-06-26T08:18:55.274Z
Enw Safonol Metadata
NRW
Fersiwn Metadata

1.0

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

Corff Cyhoeddi

Mynediad i'r Porth
Mynediad llawn i'r porth a'r metadata.


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