Phase 2 Saltmarsh Survey of Wales
Coastal saltmarshes in the UK comprise of the upper, vegetated portions of intertidal mudflats, lying approximately between mean high water neap tides and mean high water spring tides. Saltmarshes are usually restricted to comparatively sheltered locations in five main physiographic situations: in estuaries, in saline lagoons, behind barrier islands, at the heads of sea lochs, and on beach plains. The development of saltmarsh vegetation is dependent on the presence of intertidal mudflats. Communities are additionally affected by differences in climate, the particle size of the sediment and, within estuaries, by decreasing salinity in the upper reaches. This National Vegetation Classification (NVC) Phase 2 project and corresponding datasets are a collation of mapped saltmarsh habitats across Wales. This data was collected to provide an overview of saltmarshes across Wales. In addition to this it has helped contribute towards the monitoring of Special Area of Conservation, which includes: Carmarthen Bay and Estuaries / Bae Caerfyrddin ac Aberoedd; Glannau Môn: Cors heli / Anglesey Coast: Saltmarsh; Pembrokeshire Marine / Sir Benfro Forol; Pen Llyn a`r Sarnau / Lleyn Peninsula and the Sarnau; Dee Estuary / Aber Dyfrdwy and Severn Estuary / Môr Hafren. The surveys were conducted between 1990 and 2003. The dataset has been extensively validated and verified. Data collected by trained personnel, digitised by contractors, validated by NRW KMG, corrections made by contractors, validated again by NRW KMG, corrections made in-house in conjunction with relevant salt marsh specialist.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS108800
- Alternative Title
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- PH2_Saltmarsh_Vegetation.LYR
- PH2_Saltmarsh_Target_Notes.LYR
- PH2_Saltmarsh_Surveys.LYR
- PH2_Saltmarsh_Sites.LYR
- PH2_Saltmarsh_Quadrats_font.LYR
- PH2_Saltmarsh_Photo_points.LYR
- PH2_Saltmarsh_Mosaics_none.LYR
- Arolwg Cam 2 Morfeydd Heli Cymru
- NVC Phase 2 Saltmarsh Survey of Wales
- Metadata Language
- English
- Lineage
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This dataset is one of a series of major Phase 2 lowland habitat surveys including former Countryside Council for Wales’ (CCW) in-house and commissioned surveys covering grassland, woodland, heathland, peatland and sand dunes. Dataset is a collation of 14 NRW commissioned NVC surveys carried out on saltmarshes across Wales. Individual surveys utilised standard NVC Phase 2 survey methodology and community definition follows the National Vegetation Classification. Habitats were mapped using GIS against either OS maps or aerial photographs. Target notes and quadrat species lists were compiled.
- Dataset Reference Date (Publication)
- 2022-08-04
Temporal Extent
- Begin date
- 1993-08-24
- End date
- 2003-08-06
- Topic category
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- Environment
- Boundaries
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- inapplicable
Distribution
Distribution
- Format Type and Description
-
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Documents
(
)
- Specification
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Each individual survey has a paper report- see separate metadata entries. [A] Species data held in paradox database (plans to transfer to Recorder in 2009/2010) [B] An all Wales collated GIS product including the following spatial information: - Vegetation polygons (ArcGIS) - Mosaic information (ArcGIS) - Site Boundaries (ArcGIS) - Survey Boundary (ArcGIS) - Quadrat points (ArcGIS) - Target Note points (ArcGIS) - Photo points (ArcGIS) - Vegetation NVC summaries (MapInfo Table)
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Documents
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)
- Resource Locator
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View and Download
World Wide Web page
- Resource Locator
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Web Service
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
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
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This dataset is one of a series of major Phase 2 lowland habitat surveys including former Countryside Council for Wales’ (CCW) in-house and commissioned surveys covering grassland, woodland, heathland, peatland and sand dunes. Dataset is a collation of 14 NRW commissioned NVC surveys carried out on saltmarshes across Wales. Individual surveys utilised standard NVC Phase 2 survey methodology and community definition follows the National Vegetation Classification. Habitats were mapped using GIS against either OS maps or aerial photographs. Target notes and quadrat species lists were compiled.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- species inventory
- habitat surveys (habitat monitoring)
- habitat mapping
- Phase 2 Survey (Phase II)
- vegetation (see also specific types eg.coastal or heathland vegetation and vegetation surveys)
- saltmarsh (salt-marsh) (salt marsh)
- National Vegetation Classification (NVC)
- vegetation surveys (vegetation monitoring)(see also biologicalsurveys)
- vegetation classification
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-13
Keywords
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SeaDataNet Parameter Discovery Vocabulary
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- Habitat extent
- Type
- Theme
Citation
- Date (Publication)
- 2024-03-28
Keywords
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NRW SMNR Keywords
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- Animals, Plants and Other Organisms (SMNR)
- Coastal Margins (SMNR)
- Sustainable Management of Natural Resources (SMNR)
- Sea and Coast (SMNR)
- Management Areas (SMNR)
- Soil and Land (SMNR)
- Soils (SMNR)
- Ecosystem (SMNR)
- Natural Resources (Incl. Features and Processes) (SMNR)
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
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
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This dataset contains 'simple derived data' which is jointly owned by NRW and the Ordnance Survey in the form of polygon GIS tables. NRW may release, publish or disseminate these components freely, providing recipients are made aware of use restrictions (see below). Data not derived from OS products have no access or use restrictions. Third party recipients may reproduce, disseminate and re-use 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. To avoid using old information, we recommend that the latest version is obtained from the original source.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW and © Crown copyright. All rights reserved. Natural Resources Wales, AC0000849444 [2016]. © Hawlfraint y Goron. Cedwir pob hawl. Cyfoeth Naturiol Cymru AC0000849444 [2016] This dataset contains 'simple derived data' which is jointly owned by NRW and the Ordnance Survey in the form of polygon vector data- vegetation, site boundary and vegetation mosaic MapInfo tables. Third parties seeking to re-use this dataset require a NRW licence. It allows reproduction, dissemination and re-use in any format or medium but only for non-commercial purposes according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS.
Attribution Statement
- Other constraints
- Open Government Licence (OGL)
Licence
- Other constraints
- Open Government Licence (OGL)
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313038383030 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T13:10:05.265Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0