SAC Monitoring: Great Crested Newt (Triturus cristatus) Populations at Halkyn Mountain / Mynydd Helygain Special Area of Conservation (SAC) (2005)

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  • wel
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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

Dynodydd
Identifier
NRW_DS46955
Teitl Amgen
Alternative Title
  • 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
Laith Metadata
Metadata Language
English
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.
Additional Information

Monitoring and Surveillance Team Leader, Bangor, NRW.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2005-12-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Young Associates Consultants
Young Associates, The Long Barn, Chester Road, Tattenhall, Chester, Cheshire
 

Extent

Extent

Hyd
Geographic Extent
SIR Y FFLINT - FLINTSHIRE
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Database ()

    Specification

    [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

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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
Degree
false
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

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Allweddair
Keywords

NRW Thesaurus
  • 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
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

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

Math o Gyfyngiad
Restriction type
Other restrictions
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

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© 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

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-3436393535 XML
Laith Metadata
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
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:42:49.19Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Master Reference Data Team
Natural Resources Wales, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 
 

Publishing Body

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