Subtidal Habitat Diversity Layer (2010)
This layer was produced for Countryside Council for Wales (CCW) as part of the 'Identifying Marine Biodiversity Hotspots in Wales' project. Habitat diversity in the range is measured using biotope richness, biotope distinctness and the number of Biodiversity Action Plan priority features metrics. A hexagonal grid with a resolution of 1 km is used to present these metrics. The purpose of this data capture was to establish subtidal diversity from known data around the Welsh coastline, from mean high water to 12 nautical miles offshore. An assessment of the suitability of data was carried out, taking into account the source of the data, its age, spatial, taxonomic and methodological accuracy. Data were also graded on survey quality using the following three categories with respect to field surveyors: professional and academic; volunteer with expert ID; and volunteer. Derived confidence ratings were recorded in the metadata and low quality data were flagged and removed from subsequent analyses.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS112412
- Alternative Title
-
- Cyngor Cefn Gwlad Cymru 2010, Haen amrywiaeth cynefinoedd islanwol
- subtidal_non_neighbourhood_biotope
- Metadata Language
- English
- Lineage
-
Biotope information for subtidal habitats was collated from the Countryside Council for Wales (CCW) and the National Biodiversity Network (NBN) Gateway (Marine Recorder Snapshot), the MarLIN databases and the Data Archive for Seabed Species and Habitats data (DASSH). Biotope codes were matched against EUNIS codes. Biotopes in 97.06 format were manually matched to 04.05 biotopes prior to EUNIS translation and in some instances where the code could not be accurately matched to the same level, and a higher level code was assigned. A hexagonal grid was used because they offer the best alignment to complex features, such as the Welsh coastline. The optimal size was determined 20km2 for the subtidal region. Metrics used to represent marine biodiversity in Wales were biotope richness, biotope distinctness and the number of priority features. Each measure was calculated for each broad sampling method type, re-combined by hexagon, and presented as a separate layer on a continuous scale.
- Dataset Reference Date (Publication)
- 2010-03-31
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
-
benthic boundary layer
Distribution
- Format Type and Description
-
-
Geographic Information System
()
- Specification
-
MapInfo layers
-
Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Biotope information for subtidal habitats was collated from the Countryside Council for Wales (CCW) and the National Biodiversity Network (NBN) Gateway (Marine Recorder Snapshot), the MarLIN databases and the Data Archive for Seabed Species and Habitats data (DASSH). Biotope codes were matched against EUNIS codes. Biotopes in 97.06 format were manually matched to 04.05 biotopes prior to EUNIS translation and in some instances where the code could not be accurately matched to the same level, and a higher level code was assigned. A hexagonal grid was used because they offer the best alignment to complex features, such as the Welsh coastline. The optimal size was determined 20km2 for the subtidal region. Metrics used to represent marine biodiversity in Wales were biotope richness, biotope distinctness and the number of priority features. Each measure was calculated for each broad sampling method type, re-combined by hexagon, and presented as a separate layer on a continuous scale.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
-
- marine (maritime)
- marine conservation (see also specific geographical areas or sites eg Skomer-marine protected areas,marine nature reserves)
- marine habitat
- habitats (see also specific types of habitats)
- biotopes
- diversity
- Subtidal
- geographical information systems (GIS)
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Habitat extent
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Keywords
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Mapping marine benthic biodiversity in Wales
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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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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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
- File Identifier
- 4f4c4942-4343-5764-6473-313132343132 XML
- Metadata Language
- English
- Parent Identifier
-
Mapping Marine Benthic Biodiversity in Wales
NRW_DS111816
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:22:27.769Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0