Surveys for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI, Geyer’s Whorl Snail Vertigo geyeri on Cors Geirch SSSI & Cors Erddreiniog SSSI, 2019

Geyer’s Whorl Snail (Vertigo geyeri) has been recorded from only three sites in Wales. Surveys undertaken at Cors Erddreiniog SSSI in 2016 and at Cors Geirch SSSI in 2016 and 2017 failed to locate the species, raising concerns that it may have been lost from both sites. However, given the small size of the snail and the possibility that low-density populations may be easily overlooked, further surveys were undertaken in October 2019 to reassess its status. Survey effort focused on areas of potentially suitable habitat at both sites, including a horse-grazed Carex lawn within Cors Erddreiniog National Nature Reserve where the species had previously been recorded, and a series of base-rich flushes. The survey aimed to determine whether Vertigo geyeri remains present and to improve understanding of its current distribution within these important wetland habitats.

Identification

Identifier
NRW_DS124734
Metadata Language
English
Lineage

Surveys for Geyer’s Whorl Snail (Vertigo geyeri) were undertaken at Cors Erddreiniog on 14 and 16 October 2019 and at Cors Geirch on 15 October 2019. Sampling focused on areas of potentially suitable habitat identified from previous surveys. Survey methodology primarily involved the collection of vegetation and litter samples from suitable habitat for subsequent laboratory processing, as the species is small and can be difficult to detect during field surveys. Sample material was examined to determine the presence or absence of Vertigo geyeri and to assess its distribution within the surveyed areas.
Additional Information

Willing, M. J. 2020. Surveys for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI and for Geyer’s Whorl Snail Vertigo geyeri on Cors Geirch SSSI & Cors Erddreiniog SSSI in 2019. NRW Evidence Report No. 404.
Dataset Reference Date (Publication)
2020-02-01

Temporal Extent

Begin date
2019-10-14
End date
2019-10-16
 
Topic category
  • Biota
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 

Extent

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Distribution

Format Type and Description
  • Database ( Unknown )

    Specification

    Species records: Recorder 6

  • Documents ( Unknown )

    Specification

    Report as pdf format

 

Quality

Data quality

Quality Scope
Dataset
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

Surveys for Geyer’s Whorl Snail (Vertigo geyeri) were undertaken at Cors Erddreiniog on 14 and 16 October 2019 and at Cors Geirch on 15 October 2019. Sampling focused on areas of potentially suitable habitat identified from previous surveys. Survey methodology primarily involved the collection of vegetation and litter samples from suitable habitat for subsequent laboratory processing, as the species is small and can be difficult to detect during field surveys. Sample material was examined to determine the presence or absence of Vertigo geyeri and to assess its distribution within the surveyed areas.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

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

Keywords

NRW Thesaurus
  • Desmoulin's whorl snail
  • geyer's whorl snail
  • Cors Geirch
  • vertigo geyeri
  • Cors Erddreiniog
  • vertigo moulinsiana
  • vertigo moulinsiana
  • whorl snails
Type
Theme

Citation

Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
NONE
 

Content

Content Information

NRW Profile

Custom Elements

NRW Related Title

Surveys for Geyer’s Whorl Snail Vertigo geyeri on Cors Erddreiniog SSSI & Cors Geirch SSSI and for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI in 2019
 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW 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.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313234373334 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2026-09-29T15:36:55.704Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

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

Publishing Body

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