Phase 2 Saltmarsh Survey of Wales

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. The surveys were conducted between 1990 and 2003. The dataset has been extensively validated and verified. However, habitat composition may change over time due to successional trends, land management or even planned developments. A record of a vegetation type or species in the digital data is therefore no guarantee that it is still extant on the ground.

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.

Identifier: NRW_DS108800

Alternative Title

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_Mosaic.dbf

Metadata Language: English

Lineage: 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. 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.

This dataset has 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.

Dataset Reference Date (Publication): 2022-08-04

Temporal Extent

Begin date: 1993-08-24

End date: 2003-08-06

Topic category

Environment
Boundaries
Biota

Owner

Natural Resources Wales (NRW)

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

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

Originator

Various

Enquiries Unit, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Extent

Geographic Extent: Wales (WLS)

Vertical Extent

Medin Extent Keyword: inapplicable

Distribution

Format Type and Description

Documents ( )

Specification

Each individual survey has a paper report- see separate metadata entries.
Database ( Recorder 6 )

Specification

[A] Species data held in Recorder 6
Geographic Information System ( Unknown )

Specification

[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)

Resource Locator: View and Download ( WWW:LINK-1.0-http--link )

Resource Locator: Web Service ( OGC:WMS )

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: 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. 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.

This dataset has 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.

Keywords

GEMET - INSPIRE themes, version 1.0

Habitats and biotopes

Type: Theme

Citation

Date (Publication): 2008-06-01

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

Keywords

NRW Thesaurus

vegetation (see also specific types eg.coastal or heathland vegetation and vegetation surveys)
habitat surveys (habitat monitoring)
saltmarsh (salt-marsh) (salt marsh)
vegetation surveys (vegetation monitoring)(see also biologicalsurveys)
habitat mapping
species inventory
Phase 2 Survey (Phase II)
vegetation classification
National Vegetation Classification (NVC)

Type: Theme

Citation

Date (Publication): 2024-06-19

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

Keywords

SeaDataNet Parameter Discovery Vocabulary

Habitat extent

Type: Theme

Citation

Date (Publication): 2024-06-19

Code: geonetwork.thesaurus.external.theme.rdf+xml

Keywords

NRW SMNR Keywords

Coastal Margins (SMNR)
Sustainable Management of Natural Resources (SMNR)
Ecosystem (SMNR)
Soils (SMNR)
Natural Resources (Incl. Features and Processes) (SMNR)
Management Areas (SMNR)
Sea and Coast (SMNR)
Animals, Plants and Other Organisms (SMNR)
Soil and Land (SMNR)

Type: Theme

Citation

Date (Publication): 2024-06-26

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

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

Constraints

Limitations on Public Access and Use

Restriction type: Other restrictions

Access Constraints Directive

Limitations: no limitations

Access Constraints Text

Other constraints: 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: © 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: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.

Licence

Other constraints: Open Government Licence

Metadata

File Identifier: 4f4c4942-4343-5764-6473-313038383030 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-09-30T14:42:57.978Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales

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

http://naturalresourceswales.gov.uk/?lang=eng

Publishing Body

Access the portal

Full access to the portal and metadata.

Phase 2 Saltmarsh Survey of Wales

Identification

Temporal Extent

Extent

Extent

Vertical Extent

Distribution

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

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

Attribution Statement

Licence

Metadata

Metadata

Publishing Body