SSSI NH3 Critical Levels
dordeb Gwyddonol Arbennig (SoDdGAau)
This layer provides a Critical Level (CLe) for ammonia against which impacts on a SSSI should be assessed. The value is the lowest CLe for a feature on that site. The layer gives the SSSI name, SSSI code and ammonia Critical Level. The ammonia CLe can be: 1: a 1µg/m3 NH3 Critical Level indicates a SSSI has N-sensitive bryophytes/lichens as a feature or has bryophytes/lichens as key components of a habitat feature of that SSSI:
3: a 3µg/m3 NH3 Critical Level indicates a SSSI has N-sensitive vegetation, or has invertebrate features that are dependent on N-sensitive vegetation.
NS: all features on a site are considered not to be particularly sensitive to ammonia; this does not mean that other aspects of a development will not have negative impacts on a SSSI, for example through water pollution or disturbance.
Mae'r haen hon yn dangos y lefel gritigol (CLe) ar gyfer amonia y dylid asesu effeithiau ar SoDdGA yn ei herbyn. Y gwerth a nodir yw'r gwerth CLe isaf ar gyfer nodwedd ar y safle hwnnw. Mae'r haen yn cynnwys enw'r SoDdGA, cod y SoDdGA a'r lefel gritigol ar gyfer amonia. Gall y CLe ar gyfer amonia fod yn: 1: mae lefel gritigol NH3 o 1µg/m3 yn dangos bod bryoffytau/cennau sy'n sensitif i nitrogen yn nodweddiadol o'r SoDdGA, neu fod bryoffytau/cennau'n gydrannau allweddol o nodwedd cynefin y SoDdGA hwnnw; 3: mae lefel gritigol NH3 o 3µg/m3 yn dangos bod gan SoDdGA lystyfiant sy'n sensitif i nitrogen, neu nodweddion infertebrat y maent yn ddibynnol ar lystyfiant sy'n sensitif i nitrogen; NS: ystyrir bod yr holl nodweddion ar safle heb fod yn enwedig o sensitif i amonia; nid yw hyn yn golygu na fydd agweddau eraill ar ddatblygiad yn cael effaith negyddol ar SoDdGA, er enghraifft drwy lygredd dŵr neu darfu.
Cydnabyddiaeth
Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Hawl Cronfa Ddata. Cedwir pob hawl. Yn cynnwys data Arolwg Ordnans. Rhif Trwydded Arolwg Ordnans AC0000849444. Hawlfraint y Goron a Hawl Cronfa Ddata.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
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DynodyddIdentifier
- NRW_DS124762
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Teitl AmgenAlternative Title
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- Sites of Special Scientific Interest ammonia critical levels
- SoDdGA NH3 Lefelau Critigol
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Laith MetadataMetadata Language
- English
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Lineage
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The dataset is based on the SSSI GIS Dataset (metadata number NRW_DS98776) with Critical Levels determined by the Terrestrial Ecosystems and Species Team.
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Dyddiad cyfeirnod y set ddata (Cyhoeddiad)Dataset Reference Date (Publication)
- 2022-08-03
Extent
Extent
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HydGeographic Extent
- Wales (WLS)
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Distribution
Dosbarthiad
Distribution
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Fformat - Math a DisgrifiadFormat Type and Description
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Geographic Information System
(
Unknown
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- Specification
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ESRI Feature Class
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Geographic Information System
(
Unknown
)
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Lleolwr AdnoddauResource Locator
- View & Download Data ( WWW:LINK-1.0-http--link )
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Lleolwr AdnoddauResource Locator
- Web Mapping Service ( OGC:WMS )
Quality
Ansawdd Data
Data quality
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Cwmpas AnsawddQuality Scope
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DatasetDataset
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CydymffurfiadConformity
- 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
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Lineage
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The dataset is based on the SSSI GIS Dataset (metadata number NRW_DS98776) with Critical Levels determined by the Terrestrial Ecosystems and Species Team.
Keywords
Allweddair
Keywords
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MathType
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ThemeTheme
Dyfyniad
Citation
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Dyddiad (Cyhoeddiad)Date (Publication)
- 2008-06-01
Allweddair
Keywords
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NRW Thesaurus
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- ammonia
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MathType
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ThemeTheme
Dyfyniad
Citation
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Dyddiad (Cyhoeddiad)Date (Publication)
- 2025-01-08
Spatial Reference System
Content
Gwybodaeth Cynnwys
Content Information
Proffil CNC
NRW Profile
Elfennau CNC
Custom Elements
- NRW Related Title
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Sites of Special Scientific Interest (SSSIs)
Constraints
Constraints
Limitations on Public Access and Use
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Math o GyfyngiadRestriction type
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Other restrictionsOther restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
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Cyfyngiadau DefnyddioUse constraints type
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Other restrictionsOther restrictions
- Other constraints
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© CNC/NRW All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Attribution Statement: 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.
Attribution Statement
- Other constraints
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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
Metadata
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Dynodydd FfeilFile Identifier
- 4f4c4942-4343-5764-6473-313234373632 XML
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Laith MetadataMetadata Language
- English
- Parent Identifier
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Sites of Special Scientific Interest (SSSIs)
NRW_DS98776
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Math o adnoddResource type
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DatasetDataset
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Dyddiad MetadataMetadata Date
- 2025-12-19T10:33:02.255Z
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Enw Safonol MetadataMetadata Standard Name
- NRW
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Fersiwn MetadataMetadata Standard Version
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1.0