SAC Monitoring: Great Crested Newt (Triturus cristatus) Populations at Halkyn Mountain / Mynydd Helygain Special Area of Conservation (SAC) (2005)
Monitoring of Great Crested Newts (GCNs) on Halkyn Mountain Special Area of Conservation (SAC), under contract. The monitoring consisted of the following: a) Survey of 45 ponds, where GCN had previously been recorded, for eggs, larvae and juveniles and other environmental data. b) Mapping of terrestrial habitat within 250m of pond to assess the value of the habitat for GCNs (total of 183.9ha). c) Collation of existing GCN count data from 1985 to 2005 in known display ponds in the SAC. d) Condition assessment of GCN as a SAC feature. This dataset forms part of the Wales-wide Common Standards Monitoring. The aim of this data capture was to assess the condition of designated SAC features based on site-specific performance indicators, and to record aspects of their management, both as an aid to management decisions and for reporting at a variety of scales.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS46955
- Alternative Title
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- Great Crested Newt populations at Halkyn Mountain SAC
- Various - Historical Newt Surveys at Halkyn Mountain SAC CCW000480000000D.
- CCW - HQ Main Assessment of Great Crested Newts at Halkyn Mountain SAC CCW000480000000E
- Arolygu ACA: Poblogaethau'r Fadfall Gribog Fawr Triturus cristatus yn ACA Halkyn Mountain / Mynydd Helygain
- Metadata Language
- English
- Lineage
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Various methodologies were used in this data collection. Terrestrial Habitat - Terrestrial habitat for great crested newts was defined by Countryside Council for Wales as being within 250 m of each pond. Areas that fell outside the boundary of the SAC were excluded from the mapping. Using MapInfo Professional v 6.5 GIS software, maps were produced showing a habitat survey zone of 250 m radius around each of the ponds to be surveyed. A 10m x 10m grid was overlaid onto this base map in order to classify the terrestrial habitat at the required resolution. Pond Assessments - All 45 ponds were revisited on 23rd August 2005 to undertake the pond assessments. Estimates were made of: - The percentage of the pond surface shaded by native macrophytes; - The percentage of the entire pond perimeter shaded to at least 1m from the shore; - The percentage of the southern perimeter shaded; and - Whether the pond was less than 10cm deep at its deepest point. Larval Surveys - A torchlight survey using a 1 million candle power Clulite torch was undertaken on 23rd August 2005 of all ponds still containing water, in order to determine the presence of larvae/juveniles. Egg searches - Natural and artificial egg laying substrates within 1m of the shore were inspected for the presence of Triturus cristatus eggs. Signs of the presence of fish or waterfowl were also recorded at this time, as well as the presence of any invasive species such as Crassula helmsii, or evidence of potential disturbance or pollution.
- Additional Information
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Monitoring and Surveillance Team Leader, Bangor, NRW.
- Dataset Reference Date (Publication)
- 2005-12-31
Temporal Extent
- Begin date
- 2005-05-31
- End date
- 2005-08-31
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- SIR Y FFLINT - FLINTSHIRE
))
Distribution
- Format Type and Description
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Database
()
- Specification
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[A] The final report in Microsoft Word and Adobe PDF formats. [B] Raw data workbook in excel format [C] A series of GIS layers displaying pond locations and habitat [D] Species Data held in Recorder 6: - CCW - HQ Main Assessment of Great Crested Newts at Halkyn Mountain SAC CCW000480000000E - Various - Historical Newt Surveys at Halkyn Mountain SAC CCW000480000000D
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Database
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Various methodologies were used in this data collection. Terrestrial Habitat - Terrestrial habitat for great crested newts was defined by Countryside Council for Wales as being within 250 m of each pond. Areas that fell outside the boundary of the SAC were excluded from the mapping. Using MapInfo Professional v 6.5 GIS software, maps were produced showing a habitat survey zone of 250 m radius around each of the ponds to be surveyed. A 10m x 10m grid was overlaid onto this base map in order to classify the terrestrial habitat at the required resolution. Pond Assessments - All 45 ponds were revisited on 23rd August 2005 to undertake the pond assessments. Estimates were made of: - The percentage of the pond surface shaded by native macrophytes; - The percentage of the entire pond perimeter shaded to at least 1m from the shore; - The percentage of the southern perimeter shaded; and - Whether the pond was less than 10cm deep at its deepest point. Larval Surveys - A torchlight survey using a 1 million candle power Clulite torch was undertaken on 23rd August 2005 of all ponds still containing water, in order to determine the presence of larvae/juveniles. Egg searches - Natural and artificial egg laying substrates within 1m of the shore were inspected for the presence of Triturus cristatus eggs. Signs of the presence of fish or waterfowl were also recorded at this time, as well as the presence of any invasive species such as Crassula helmsii, or evidence of potential disturbance or pollution.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- rare species
- amphibians (amphibia) (see also specific species)
- newts (see also specific species)
- triturus cristatus
- great crested newts
- freshwater fauna
- Common Standards Monitoring (CSM)
- Special Areas of Conservation (SAC) - SAC monitoring
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- Halkyn Mountain /Mynydd Helygain SAC
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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An appraisal of the condition of the great crested newt Triturus cristatus populations at Mynydd Helygain / Halkyn Mountain SAC
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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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
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© CNC/NRW and © Crown copyright 2005. 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. Restrictions on publishing this data apply to the following survey. Various - Historical Newt Surveys at Halkyn Mountain SAC CCW000480000000D.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-3436393535 XML
- Metadata Language
- English
- Parent Identifier
-
SAC Monitoring: Great Crested Newt (Triturus cristatus) Populations at Halkyn Mountain / Mynydd Helygain Special Area of Conservation (SAC) (2005)
NRW_DS46955
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:42:49.19Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0