Vegetation Survey of Maritime Cliff and Slopes of the Llyn Peninsula

Maritime cliff and slopes is a priority habitat within the UK Biodiversity Action Plan. Selected maritime sites on the Llyn Peninsula were surveyed, mapped and evaluated in September/October 2000 and the range of National Vegetation Classification (NVC) vegetation types present characterized. A number of sections of the UK coastline have been nominated as 'Vegetated Sea Cliffs of the Atlantic and Baltic Coasts' candidate Special Areas of Conservation under the EC Habitats Directive. This survey was undertaken as part of the former Countryside Council for Wales (CCWs) commitment to undertake research and survey in order to increase knowledge of the extent and quality of this resource. Selected maritime sites on the Llyn Peninsula: - Porth Neigwl (Hell's Mouth) - Porth Dinllaen (Borth Wen to Penrhyn Nefyn) - Porth Nefyn (Penrhyn Nefyn to Penrhyn Bodeilias) - Porth Pistyll (Penrhyn Bodeilias to the lower slopes of Carreg y Llam)

Identification

Identifier
NRW_DS110036
Metadata Language
English
Lineage

Survey carried out during periods of low high tides, to allow the maximum access to the base of the cliffs. The basic recording unit was a 2 m x 2 m quadrat. For each quadrat a full species list, mean height of the vegetation, aspect, and slope were recorded. Where the slope of the cliff was very unstable, or too steep to allow access, quadrat records were made using binoculars. Soil information, grazing records and additional factors relating to disturbance were also recorded. Mapping in the field was carried out on 1:2500 computer-generated maps.
Dataset Reference Date (Publication)
2000-11-30
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Ecological Surveys (Bangor) -
The School House, Canon Pyon, Hereford, Herefordshire, HR4 8PF
http://www.ecologicalsurveys.co.uk/
 

Extent

Extent

Geographic Extent
Wales (WLS)
Geographic Extent
GWYNEDD - GWYNEDD
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
benthic boundary layer
 
 

Distribution

Distribution

Format Type and Description
  • Documents ( )

    Specification

    Evidence Report in PDF or MS Word

  • Geographic Information System ( )

    Specification

    MapInfo products- Aggregated_Areas.TAB, Quadrats.TAB and Polygons.TAB for each site surveyed.

  • Delimited ( )

    Specification

    Excel- Tabulated quadrat data.

 

Quality

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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Survey carried out during periods of low high tides, to allow the maximum access to the base of the cliffs. The basic recording unit was a 2 m x 2 m quadrat. For each quadrat a full species list, mean height of the vegetation, aspect, and slope were recorded. Where the slope of the cliff was very unstable, or too steep to allow access, quadrat records were made using binoculars. Soil information, grazing records and additional factors relating to disturbance were also recorded. Mapping in the field was carried out on 1:2500 computer-generated maps.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • maritime cliffs
  • Porth Dinllaen
  • Porth Neigwl
  • Porth Nefyn
  • marine and freshwater inventory
  • National Vegetation Classification (NVC)
  • cliffs
  • cliff habitats
  • Porth Pistyll
  • vegetation (see also specific types eg.coastal or heathland vegetation and vegetation surveys)
Type
Theme

Citation

Date (Publication)
2025-01-08
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
Type
Theme

Citation

Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

NRW Related Title

Vegetation survey of maritime cliff and slopes of the Llyn Peninsula 2000
 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

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

© CNC/NRW and © Crown copyright [2000]. 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.
 

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.
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313130303336 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2026-03-03T11:17:38.025Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

Access the portal