Maritime Supralittoral Lichen Survey of the Portmeirion Promontory, Morfa Harlech National Nature Reserve (NNR), Site of Special Sceintific Importance (SSSI), and Candidate Special Area of Conservation (cSAC)
This dataset is made up of the results of a supralittoral lichen survey on coastal rocks around the Portmeirion headland within the Morfa Harlech. Morfa Harlech is designated as a National Nature Reserve (NNR), Site of Special Sceintific Importance (SSSI), and Candidate Special Area of Conservation (cSAC). The development and diversity of the supralittoral lichen communities is this area is one of great importance and is of conservation significance in this context. The purpose of this data capture was to produce an inventory of supralittoral lichen species, highlighting and localising any noteworthy taxa and assemblages.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS87152
- Alternative Title
-
- Arolwg o Gennau Uwch-lanwol Arforol Pentir Portmeirion, yACA Pen Llyn a'r Sarnau/SoDdGA/GNG Morfa Harlech
- Metadata Language
- English
- Lineage
-
Observations were made by experienced surveyors following standard methodology. The coastline was systematically walked and stops made at promising localities. The survey focussed on supralittoral lichen communities, i.e. those occurring at and above mean high water (MHW). Frequently submerged lower shore eu-littoral lichen communities, dominated by filmy Verrucaria species (‘oil lichens’), were not examined in any detail. The upper survey boundary was set at the terrestrial – xeric-supralittoral interface. In practice, because of the low elevation of the shore exposures, this was where cliff-top rock terminated and terrestrial woody and coastal scrub vegetation commenced. An exception was made for one essentially terrestrial dry dwarf shrub heath formation, with coastal character, on the cliff-top a short distance inland from Trwynypenrhyn, which supported an interesting mix of hard upland acid and coastal rock species, including the rare Pertusaria monogona. Notable species and assemblages were logged in the field with a Garmin 12-channel Global Positioning System (GPS) unit, delivering grid references accurate to 1-15m (maximum ten-figure resolution), the performance depending on satellite reception and topographic shadowing. GPS locations form spatial reference points for the location target notes as detailed below.
- Dataset Reference Date (Publication)
- 2004-11-30
Temporal Extent
- Begin date
- 2004-01-31
- End date
- 2004-02-29
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
-
-
Documents
()
- Specification
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[A] Report is held in Word Format. [B] A map of the survey area in .jpg format [C] Dataset comprised of spatial data (Tab files), table of survey site grid references in Word and Excel formats.
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Observations were made by experienced surveyors following standard methodology. The coastline was systematically walked and stops made at promising localities. The survey focussed on supralittoral lichen communities, i.e. those occurring at and above mean high water (MHW). Frequently submerged lower shore eu-littoral lichen communities, dominated by filmy Verrucaria species (‘oil lichens’), were not examined in any detail. The upper survey boundary was set at the terrestrial – xeric-supralittoral interface. In practice, because of the low elevation of the shore exposures, this was where cliff-top rock terminated and terrestrial woody and coastal scrub vegetation commenced. An exception was made for one essentially terrestrial dry dwarf shrub heath formation, with coastal character, on the cliff-top a short distance inland from Trwynypenrhyn, which supported an interesting mix of hard upland acid and coastal rock species, including the rare Pertusaria monogona. Notable species and assemblages were logged in the field with a Garmin 12-channel Global Positioning System (GPS) unit, delivering grid references accurate to 1-15m (maximum ten-figure resolution), the performance depending on satellite reception and topographic shadowing. GPS locations form spatial reference points for the location target notes as detailed below.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- coastal ecology
- coast (coasts) (coastal) (coastline) (maritime)
- coastal survey (coastal monitoring)
- Portmeirion
- lichens
- marine lichens (maritime lichens)
- lichen ecology
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Coastal geomorphology
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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A conservation evaluation of British lichens
- NRW Related Title
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Checklist of lichens of Great Britain and Ireland
- NRW Related Title
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Lichens of Conservation Concern - Site Data for Wales
- NRW Related Title
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Maritime supralittoral lichen survey of the Portmerion promontory, Morfa Harlech NNR/SSSI/PLAS cSAC
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 2004. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-3837313532 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T12:33:03.853Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0