The Distribution of Salix herbacea (tiny creeping willow) on the Glydeiriau and evaluation of habitat quality
Eryri is the most southerly mountain range in Britain with summits of over 914 metres (3,000 feet). As a consequence, it is also the southern-most station for a number of Britain's montane vegetation communities, and also a range of arctic alpine plants. The importance of the montane vegetation in this area has been recognised both nationally through the notification of the three highest mountain ranges as the Eryri Site of Special Interest (SSSI), but also internationally through the designation of this site as the Eryri/Snowdonia Special Area of Conservation (SAC). In addition many of the upland habitats that are present are listed in the UK Biodiversity Action Plan (BAP). One of the arctic alpine plants which characterises some of Eryri's most exposed and inhospitable summits and crags is Salix herbacea, the smallest of the British willows. Salix herbacea is a component species of Carex bigelowii-Racomitrium lanuginosum moss-heath (National Vegetation Classification (NVC) code U10), chasmophytic vegetation of rock crevices and rocky tors, and very rarely a component of flush/spring vegetation including (NVC code M3I) Anthelia julacea-Sphagnum auriculatum spring. The habitat that supports the largest stands of S. herbacea is the moss-heath and this occupies plateaux and ridges from 730-970 metres. Less frequently, it also occurs as a component of chasmophytic communities, usually with very few individuals at each site, and with an altitudinal range of 670 -998 metres. This dataset is a collation of the results from a survey of the distribution of stands of Salix herbacea on the Glydeiriau, and comparisons between this data-set, and a similar data-set of 1986. The purpose of this data capture was to: - Assess the condition of those plant communities which support Salix herbacea and where these communities are found to be in unfavourable condition, - Assess the causes and impacts that have lead to this condition; - Identify any changes in distribution that may have occurred during the period between the capture of data sets in 1986 and 2007 and which might be attributed to climate change; - Identify those stands of vegetation which might be expected to be most vulnerable to climate change, and which might be monitored in future years. All suitable habitat on the Glydeiriau above 600 metres which supported Salix herbacea, included H6150: Siliceous alpine and boreal grasslands on summits, summit ridges, and bwlchs. H8220: Siliceous rocky slopes with chasmophytic vegetation, particularly on exposed ridges and bwlchs, and high level.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS108573
- Alternative Title
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- Dosbarthiad helyg bach Salix herbacea ar y Glyderau a gwerthusiad o ansawdd y cynefin.
- Metadata Language
- English
- Lineage
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Methodologies adapted from JNCC (2006) Common Standards Monitoring Guidance for Upland Habitats. During this survey, three methodologies were used for data collection; mapping of stand, the recording of quadrat data, and target notes. Grid references were recorded either through the use of GPS (10 figure grid references), or through the interrogation of field maps (8 figure grid references).
- Dataset Reference Date (Publication)
- 2008-03-31
Temporal Extent
- Begin date
- 2007-07-22
- End date
- 2007-08-03
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
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Distribution
- Format Type and Description
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Documents
()
- Specification
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[A] Published report - Paper and electronic version (PDF and MS Word). (Quadrat and Target Note data was included in the PDF of the report, but did not appear in the hard copy of the report. [B] Map of distribution - Paper maps and digital point data (MapInfo table). Photos of sites of Quadrat and Target Notes, and photos for relocation of these sites, supplied in digital format.
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Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Methodologies adapted from JNCC (2006) Common Standards Monitoring Guidance for Upland Habitats. During this survey, three methodologies were used for data collection; mapping of stand, the recording of quadrat data, and target notes. Grid references were recorded either through the use of GPS (10 figure grid references), or through the interrogation of field maps (8 figure grid references).
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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The distribution of Salix herbacea on the Glydeiriau and evaluation of habitat quality
- NRW Related Title
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Fungi of northwest Wales : a mycota of the vice counties of Merionethshire, Caernarvonshire and Anglesey (VCs 48, 49 and 52)
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 2008 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
- 4f4c4942-4343-5764-6473-313038353733 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:39:00.492Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0