Saltmarsh Features at Pen Llyn a'r Sarnau Special Area of Conservation (SAC) - Glaslyn 1993
Use of the National Vegetation Classification (NVC) as a basis for community definition in the saltmarsh habitats of Pen Llyn a'r Sarnau - Glaslyn 1993. The main objective of the survey was to use the National Vegetation Classification to describe and map the unusual brackish water saltmarsh communities on the seaward edge of the marsh as well as characterising some of the transitional vegetation types and the glycophytic communities on the middle and upper marsh.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS109885
- Alternative Title
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- Nodweddion morfa heli ACA Pen Llyn a'r Safnau- Glaslyn 1993
- NVC Phase 2 survey of Glaslyn Marsh 1993
- Metadata Language
- English
- Lineage
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Standard NVC survey methodology. All the homogenous stands of different maritime vegetation were identified and mapped. A 4m2 quadrat was then used to estimate the cover abundance (Domin scale) of all taxa found within selected stands of each vegetation type. Computer software package Vespan II was used to store and handle the quadrat data. Data collected by trained personnel, digitised by contractors, validated by NRW, corrections made by contractors, validated again by NRW, corrections made in-house in conjunction with relevant salt marsh specialist. NRW commissioned survey which contributes to an NVC Saltmarsh survey collation (see 'part of' field).
- Dataset Reference Date (Publication)
- 1994-12-31
Temporal Extent
- Begin date
- 1993-08-28
- End date
- 2013-04-03
- Topic category
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- Environment
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
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Geographic Information System
()
- Specification
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[A] GIS products- Vegetation polygons (MapInfo Table) - Site Boundaries (MapInfo Table) - Survey Boundary (MapInfo Table) - Vegetation NVC summaries (MapInfo Table) [B] Report published in Field Studies (journal of the Field Studies Council) volume 8 (1994) page 373- 384
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Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Standard NVC survey methodology. All the homogenous stands of different maritime vegetation were identified and mapped. A 4m2 quadrat was then used to estimate the cover abundance (Domin scale) of all taxa found within selected stands of each vegetation type. Computer software package Vespan II was used to store and handle the quadrat data. Data collected by trained personnel, digitised by contractors, validated by NRW, corrections made by contractors, validated again by NRW, corrections made in-house in conjunction with relevant salt marsh specialist. NRW commissioned survey which contributes to an NVC Saltmarsh survey collation (see 'part of' field).
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- geographical information systems (GIS)
- vegetation surveys (vegetation monitoring)(see also biologicalsurveys)
- vegetation classification
- vegetation (see also specific types eg.coastal or heathland vegetation and vegetation surveys)
- National Vegetation Classification (NVC)
- Glaslyn
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- Pen Llyn a'r Sarnau SAC
- saltmarsh (salt-marsh) (salt marsh)
- Type
- Theme
Citation
- Date (Publication)
- 2024-04-09
Keywords
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SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Type
- Theme
Citation
- Date (Publication)
- 2024-03-28
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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The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions).
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW and © Crown copyright [1994]. All rights reserved. Natural Resources Wales, AC0000849444. Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination 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.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313039383835 XML
- Metadata Language
- English
- Parent Identifier
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Phase 2 Saltmarsh Survey of Wales
NRW_DS108800
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T10:56:36.361Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0