Special Area of Conservation (SAC) Monitoring: White Clawed Crayfish in River Wye SAC (2003)
The inclusion of the white-clawed crayfish on Annex II of the EU Habitats and Species Directive requires Countryside Council for Wales (CCW) to identify Special Areas of Conservation for the species and to ensure that Favourable Conservation Status (FCS) applies. The purpose of this data capture was to undertake monitoring of the white-clawed crayfish and its habitat on the River Wye candidate Special Area of Conservation (cSAC) in order to report on condition as part of the assessment of Favourable Conservation Status for Natura 2000 features.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115577
- Alternative Title
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- Monitro'r Cimwch Crafanc Wen yn ACA Afon Gwy
- Metadata Language
- English
- Lineage
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Condition monitoring followed the Common Standards approach outlined by the Joint Nature Conservation Committee. Eight monitoring units (Afon Duhonw, Afon Edw, Afon Irfon, Afon Llynfi, Clyro Brook, Dulas Brook [Builth Wells], Nant yr Qffeiriad and Sgithwen Brook) were sampled following the protocol given by Peay (2002; see http://www.english-nature.org.uk/LIFEinUKRivers/monitoring.html ). A total of 16 x 500m stretches were selected randomly within each monitoring unit. Starting from the downstream end of the stretch, a 100m sampling site should be selected within each stretch which contains five suitable habitat patches measuring from 1 to 20m2. Within each habitat patch, 10 potential refuges (large cobble or boulder >15cm along longest axis) should be searched and the number of crayfish recorded. For each crayfish found, a number of attributes were recorded and a detailed record made of the physical attributes of all habitat patches sampled. The white-clawed crayfish is a proposed feature on the River Wye cSAC. Surveys in 1995 and 2002 have helped to determine its status and distribution, and identified the most important tributaries (Rogers and Holdich, 1995; Rogers and Watson, 2003), and this information has enabled the setting of provisional thresholds for condition assessment.
- Dataset Reference Date (Publication)
- 2003-10-31
Temporal Extent
- Begin date
- 2003-08-01
- End date
- 2003-10-31
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
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Documents
Documents
()
- Specification
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[A] The final report in Microsoft Word and Adobe PDF formats, individual Appendix's in Adobe PDF Format. [B] Data associated to each Appendix is held within Microsoft Excel Format [C] Maps associated to the report are in .GIF Format as well as each being on a Microsoft Word Document.
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Documents
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Condition monitoring followed the Common Standards approach outlined by the Joint Nature Conservation Committee. Eight monitoring units (Afon Duhonw, Afon Edw, Afon Irfon, Afon Llynfi, Clyro Brook, Dulas Brook [Builth Wells], Nant yr Qffeiriad and Sgithwen Brook) were sampled following the protocol given by Peay (2002; see http://www.english-nature.org.uk/LIFEinUKRivers/monitoring.html ). A total of 16 x 500m stretches were selected randomly within each monitoring unit. Starting from the downstream end of the stretch, a 100m sampling site should be selected within each stretch which contains five suitable habitat patches measuring from 1 to 20m2. Within each habitat patch, 10 potential refuges (large cobble or boulder >15cm along longest axis) should be searched and the number of crayfish recorded. For each crayfish found, a number of attributes were recorded and a detailed record made of the physical attributes of all habitat patches sampled. The white-clawed crayfish is a proposed feature on the River Wye cSAC. Surveys in 1995 and 2002 have helped to determine its status and distribution, and identified the most important tributaries (Rogers and Holdich, 1995; Rogers and Watson, 2003), and this information has enabled the setting of provisional thresholds for condition assessment.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- crayfish
- astacida (astacidae) (see also specific crayfish species)
- white-clawed crayfish
- austropotamobius pallipes
- Special Areas of Conservation (SAC) - SAC monitoring
- River Wye Tributaries
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Assessment of the condition of the white clawed crayfish in the river Wye cSAC
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313135353737 XML
- Metadata Language
- English
- Parent Identifier
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Condition monitoring of Special Areas of Conservation (SACs) in Wales
NRW_DS110194
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:40:53.345Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0