Squirrel Survey of Aberhirnant Forest and Woodland surrounding Lake Vyrnwy (1999 - 2000)
Arolwg ar wiwerod Aberhirnant a'r coetir o amgylch Llyn Efyrnwy, 1999-2000

  • English
  • wel
  • All

This dataset is made up of presence or absence records for red and grey squirrels in Aberhirnant Forest and the woodlands surrounding Lake Vyrnwy.


The purpose of this data capture was to report on the presence, distribution and likely status of red squirrels in Aberhirnant Forest and the Lake Vyrnwy area. The data is will be used as a basis to assess whether red squirrels have a future in this area, that is, sufficient potential to justify further monitoring and sympathetic forest management. The target sites included conifer plantations of Aberhirnant Forest and the catchment area of Lake Vyrnwy.

Identification

Dynodydd
Identifier
NRW_DS100791
Teitl Amgen
Alternative Title
  • Squirrel Data - CCW - HQ Terr - Aberhirnant & Lake Vyrnwy, Report 241 CCW0003800000005
Laith Metadata
Metadata Language
English
Lineage

This original survey was carried out between 1999 and 2000. A follow up survey was commissioned by CCW in 2001. An initial survey of 17 grids of hair tubes were set out in Aberhirnant Forest and two in the Lake Vyrnwy Plantation in 1999. Each grid consisted of 20 hair tubes in four rows each of five tubes. Each row was 100m apart and the tubes were 100m apart in the rows. Tubes were fixed to trees and baited. These were then checked every two weeks and hairs deposited in the tubes were checked by eye and verified under a microscope using the negative staining technique where necessary.


Grid references have been estimated from a map. A total of 1290 records were taken, of which 45 were positive.
Additional Information

Further information is available in the report "Red Squirrel Conservation: Report on the status of red and grey squirrels in the Aberhirnant Forest and woodlands surrounding Lake Vyrnwy FCRA Project 241 squirrel management in Woodlands."
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2003-12-31

Temporal Extent

Begin date
1999-11-23
End date
2000-06-19
 
Categori pwnc
Topic category
  • Environment
    Environment
  • Biota
    Biota
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Cartmel -
 

Extent

Extent

Hyd
Geographic Extent
POWYS - POWYS
Hyd
Geographic Extent
GWYNEDD - GWYNEDD
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Dosbarthiad
Distribution

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

    Specification

    Raw data to be held in Recorder 6 - Squirrel Data - CCW - HQ Terr - Aberhirnant & Lake Vyrnwy, Report 241 CCW0003800000005. Species data is also available to download on the NBN Gateway - See Resource Locator

  • Documents ( Unknown )

    Specification

    Paper map and tables published in a summary report

  • Geographic Information System ( Unknown )

    Specification

    Map of grid and row/trap locations to be held in Mapinfo table

 

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

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

This original survey was carried out between 1999 and 2000. A follow up survey was commissioned by CCW in 2001. An initial survey of 17 grids of hair tubes were set out in Aberhirnant Forest and two in the Lake Vyrnwy Plantation in 1999. Each grid consisted of 20 hair tubes in four rows each of five tubes. Each row was 100m apart and the tubes were 100m apart in the rows. Tubes were fixed to trees and baited. These were then checked every two weeks and hairs deposited in the tubes were checked by eye and verified under a microscope using the negative staining technique where necessary.


Grid references have been estimated from a map. A total of 1290 records were taken, of which 45 were positive.
 

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
  • sciurus vulgaris
  • vyrnwy
  • Aberhirnant Forest
  • grey squirrels
  • squirrels (see also specific species)
  • sciuridae
  • red squirrels
  • sciurus carolinensis
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-08-27
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

Aberhirnant red squirrel survey : second phase, summer 2001
NRW Related Title

Squirrel Collation for Wales
 

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

This data is comprised of a mixture of third party owned records and NRW records. NRW policy permits access to and release of this data under the same terms as its own data. There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW and various third party recorders. NRW owns the copyright of the collation, but the ownership of the records themselves rests with the originator. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. © Various third party recorders.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313030373931 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Squirrel Collation for Wales

NRW_DS102082
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-09-28T13:01:15.475Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

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

Publishing Body

Access the portal