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.

Identifier: NRW_DS115641

Alternative Title

Monitro ACA: Asesu Cyrsiau Dwr sy n cynnwys Llystyfiant Ranunculion Fluitantis a Callitricho-Batrachion ACA Afon Gwy

Metadata Language: English

Lineage: 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.

Dataset Reference Date (Publication): 2007-03-31

Temporal Extent

Begin date: 1995-01-01

End date: 2005-12-31

Topic category

Biota

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

Ardeola Environmental Services

45 The Bridle, Stroud, Gloucester, GL5 4SQ

Extent

Geographic Extent: POWYS - POWYS

Geographic Extent: SIR FYNWY - MONMOUTHSHIRE

Map representing the geographic extent of the dataset

Format Type and Description

Documents ()

Specification

All Data is currently held within the report.

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
Degree: false

Lineage: 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.

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

Special Areas of Conservation (SAC) - SAC monitoring
ranunculas fluitans
water-crowfoots (water crowfoot, river water crowfoot)

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: 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

Constraints

Limitations on Public Access and Use

Restriction type: Other restrictions

Access Constraints Directive

Limitations: no limitations

Access Constraints Text

Other constraints: There are no access restrictions on this data. NRW may release, publish or disseminate it freely.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © 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

File Identifier: 4f4c4942-4343-5764-6473-313135363431 XML

Metadata Language: English

Parent Identifier: Condition monitoring of Special Areas of Conservation (SACs) in Wales
NRW_DS110194

Resource type: Dataset

Metadata Date: 2024-05-31T09:43:57.492Z

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.

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

Identification

Temporal Extent

Extent

Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body