GeoNodeFeatureCatalogue Generic Feature Catalogue Generic Feature Catalogue 1.0 2016-01-11 DataMapWales pointOfContact geonode:nrw_sssi_nh3_cl <p>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 1&micro;g/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 3&micro;g/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.</p> <p><strong>Attribution statement</strong></p> <p>Contains Natural Resources Wales information &copy; Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.</p> false SSSI NH3 Critical Levels objectid_1 1 1 xsd:int sssi_name 1 1 xsd:string sssi_id 1 1 xsd:double sssi_code 1 1 xsd:string sssi_nh3_c 1 1 xsd:string shape_starea__ 1 1 xsd:double shape_stlength__ 1 1 xsd:double geom 1 1 gml:MultiPolygonPropertyType