Special Area of Conservation (SAC) Monitoring: Assessing Water Courses of Plain to Montane Levels with the Ranunculion Fluitantis and Callitricho-Batrachion Vegetation of the River Wye SAC
The single habitat listed in Annex I of the Habitats Directive which is a primary reason for selection of the River Wye as a Special Area of Conservation (SAC) is of Water courses of plain to montane levels with submerged or floating vegetation of the Ranunculion fluitantis and Callitricho-Batrachion (Habitat 3260). The purpose of this data capture was to assess the condition of the Water Courses of Plain to Montane Levels with the Ranunculion Fluitantis and Callitricho-Batrachion Vegetation. The aim of the work was to assess the conservation condition of this habitat. This dataset presents the results of the Common Standards Monitoring Assessment (CSM) of the River Wye and selected tributaries. The assessment was performed based on data collected in 1995 and in 2005. The CSM assessment was based purely on macrophyte survey data as these were the only comparable data available from the 1995 surveys.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS115641
- Teitl Amgen
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- Monitro ACA: Asesu Cyrsiau Dwr sy n cynnwys Llystyfiant Ranunculion Fluitantis a Callitricho-Batrachion ACA Afon Gwy
- Laith Metadata
- English
- Datganiad
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For each 500 m section a surveyor walks the river ensuring that all macrophytes on the channel and margin are recorded. Each macrophyte is assigned a measure of its percentage cover and of its abundance relative to other taxa. In addition, some physical features are recorded against standard classes and values. A section is typified by running the data through a key (Holmes et al. 1999, page: 104), which will lead to one of the types listed in Appendix C. Recording Mean Trophic Rank involves a surveyor walking the wetted area of the channel for 100 m, recording the cover of all macrophytes on a five point scale. The abundance of each scoring taxon is then multiplied by the score for the taxon (STR) provided in the manual, all the scores are summed and the total divided by the sum of the cover values to derive an MTR score. A series of thresholds are then given from which the decision is made as to whether or not the discharge is considered to have a significant enough effect that it needs to be modified. Common Standards Monitoring involves analysis of a number of different data sets including those derived from JNCC macrophyte survey and from River Habitat Survey (RHS). If any of the analyses fail, then the section is deemed to have failed. For this reason, it is reasonable to consider only one element of the river CSM process - the macrophyte element.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2007-03-31
Ystod amser
- Dyddiad cychwyn
- 1995-01-01
- Dyddiad gorffen
- 2005-12-31
- Categori pwnc
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- Biota
Rhychwant
Rhychwant
- Hyd
- POWYS - POWYS
- Hyd
- SIR FYNWY - MONMOUTHSHIRE
))
Dosbarthiad
- Fformat - Math a Disgrifiad
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-
Documents
()
- Math
-
All Data is currently held within the report.
-
Documents
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
For each 500 m section a surveyor walks the river ensuring that all macrophytes on the channel and margin are recorded. Each macrophyte is assigned a measure of its percentage cover and of its abundance relative to other taxa. In addition, some physical features are recorded against standard classes and values. A section is typified by running the data through a key (Holmes et al. 1999, page: 104), which will lead to one of the types listed in Appendix C. Recording Mean Trophic Rank involves a surveyor walking the wetted area of the channel for 100 m, recording the cover of all macrophytes on a five point scale. The abundance of each scoring taxon is then multiplied by the score for the taxon (STR) provided in the manual, all the scores are summed and the total divided by the sum of the cover values to derive an MTR score. A series of thresholds are then given from which the decision is made as to whether or not the discharge is considered to have a significant enough effect that it needs to be modified. Common Standards Monitoring involves analysis of a number of different data sets including those derived from JNCC macrophyte survey and from River Habitat Survey (RHS). If any of the analyses fail, then the section is deemed to have failed. For this reason, it is reasonable to consider only one element of the river CSM process - the macrophyte element.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
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- Special Areas of Conservation (SAC) - SAC monitoring
- ranunculas fluitans
- water-crowfoots (water crowfoot, river water crowfoot)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
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Assessment of the condition of water courses of plain to montane levels with the ranunculion fluitantis and callitricho-batrachion vegetation of the River Wye SAC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
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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
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313135363431 XML
- Laith Metadata
- English
- Dynodydd Rhiant
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Condition monitoring of Special Areas of Conservation (SACs) in Wales
NRW_DS110194
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:43:57.492Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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1.0