Monitoring Invertebrate features on Sites of Special Scientific Interest (SSSIs): assessing and reviewing the status of the troglobitic spider Porrhomma rosenhaueri in Ogof y Ci and Lesser Garth Cave, South Wales in 2017
Monitro nodweddion Infertebratau o Safleoedd o Ddiddordeb Gwyddonol Arbennig (SoDdGA): asesu ac adolygu statws y corynod Porrhomma rosenhaueri yn Ogof y Ci ac Ogof Ffynnon Taf De Cymru yn 2017

  • English
  • wel
  • All

Porrhomma rosenhaueri is a rare cave-dwelling spider with a highly restricted distribution in the UK, known only from Ogof y Ci near Merthyr Tydfil and Lesser Garth Cave near Cardiff. This survey was undertaken to determine whether the species remained present in the Ogof y Ci cave system and to assess the feasibility of establishing a Common Standards Monitoring (CSM) protocol for long-term population monitoring. The survey also revisited the existing CSM monitoring programme for Lesser Garth Cave to assess the condition of the spider population and the ecological condition of the cave habitat. Surveys undertaken in 2017 confirmed the continued presence of Porrhomma rosenhaueri at both sites, including the first record from Ogof y Ci since 1971. Results indicate that both cave systems support important cave invertebrate assemblages and remain significant sites for the conservation of this species.

Identification

Dynodydd
Identifier
NRW_DS121120
Teitl Amgen
Alternative Title
Laith Metadata
Metadata Language
English
Lineage

Survey data were collected through visual searches of suitable cave habitats. Two site visits were undertaken during September and October 2017 to survey Ogof y Ci and other accessible sites within the Nant Glais Caves SSSI for Porrhomma rosenhaueri and associated cave fauna. The species was recorded within the Ogof y Ci cave system, providing the first confirmed record since 1971 and enabling the development of recommendations for future monitoring. In October 2017, the established Common Standards Monitoring (CSM) protocol for Lesser Garth Cave was repeated to assess the status and distribution of the spider population within the cave. Records of spiders, webs and habitat condition were collected and compared with previous surveys to evaluate population status and support ongoing conservation monitoring.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2018-01-01

Temporal Extent

Begin date
2017-09-09
End date
2017-10-31
 
Categori pwnc
Topic category
  • Biota
    Biota
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  National Museums and Galleries of Wales -
Education Department, Cathays Park, Cardiff, Vale of Glamorgan, CF1 3NP
http://www.museumwales.ac.uk/
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
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

    Species records: Recorder 6

  • Documents ( Unknown )

    Specification

    Report in pdf format

 

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

Survey data were collected through visual searches of suitable cave habitats. Two site visits were undertaken during September and October 2017 to survey Ogof y Ci and other accessible sites within the Nant Glais Caves SSSI for Porrhomma rosenhaueri and associated cave fauna. The species was recorded within the Ogof y Ci cave system, providing the first confirmed record since 1971 and enabling the development of recommendations for future monitoring. In October 2017, the established Common Standards Monitoring (CSM) protocol for Lesser Garth Cave was repeated to assess the status and distribution of the spider population within the cave. Records of spiders, webs and habitat condition were collected and compared with previous surveys to evaluate population status and support ongoing conservation monitoring.
 

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
  • biological monitoring
  • cave spider
  • biological surveys
  • ecological surveys
  • porrhomma rosenhaueri
  • caves
  • invertebrate surveys
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

Monitoring Invertebrate features on SSSIs: assessing and reviewing the status of the troglobitic spider Porrhomma rosenhaueri in Ogof y Ci and Lesser Garth Cave, South Wales in 2017
 

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

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 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

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313231313230 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Welsh Invertebrate Database (WID)

NRW_DS23774
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-09-29T15:04:52.002Z
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

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