NRW_DS110463 eng NRW_DS114501 dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T12:00:36 MEDIN 3.1.2 wel eng utf8 Latitude and Longitude (EPSG::4326) Surveys of Sea Caves in Welsh Special Areas of Conservation (SAC) Surveys of Sea Caves in Welsh Special Areas of Conservation (SAC) Arolygon o ogofau mor yn Ardaloedd Cadwraeth Arbennig Cymru 2000-01 CCW /Marine Seen survey of sea caves in Welsh SACs JNCCMNCR40000961 2002 - CCW/Marine Seen survey of sea caves in Welsh SACs MRCCW3000000001C 2003-04-30 publication 4f4c4942-4343-5764-6473-313130343633 Inventorial survey as a first step for former Countryside Council for Wales (CCW), now part of Natural Resources Wales (NRW), to develop sensitivity management and monitoring for submerged or partially submerged caves. Submerged or partially submerged caves are an Annex 1 habitat listed under the Habitats directive. Caves vary in size, from only a few metres to more extensive systems, which may extend hundreds of metres into the rock. There may be tunnels or caverns with one or more entrances, in which vertical and overhanging rock faces provide the principal marine habitat. Sea cave communities vary considerably depending on the structure and extent of the cave system, their degree of submergence and of exposure to sand scour and wave-surge, and their geology. Caves are typically colonised by encrusting animal species but may also support shade-tolerant seaweeds near their entrances. Physical conditions, such as inclination, wave surge, scour and shade, change rapidly from cave entrance to the inner parts of a cave, and this often leads to a marked gradation in the communities present. Surveys were set up to identify a baseline and trial survey methodologies in order to establish surveillance and monitoring programmes for the feature. 24 caves (and tunnels) were described. They include caves that are wholly Intertidal, wholly subtidal and ones with both littoral and sublittoral elements. They range from caves that extend 1-3 meters into the cliff to ones that extend up to 100 meters into the cliff. Inventorial survey as a first step for CCW to develop sensitivity management and monitoring for submerged or partially submerged caves. 24 caves across Pembrokeshire Marine Special Area of Conservation (SAC), Cardigan Bay SAC, Pen Llyn a'r Sarnau SAC and Menai Strait and Colwyn Bay SAC. All measurements were taken to a standard protocol as described in the CCW Marine Monitoring Report no. 6. Specimens were fixed and preserved. Inventorial survey as a first step for former Countryside Council for Wales (CCW), now part of Natural Resources Wales (NRW), to develop sensitivity management and monitoring for submerged or partially submerged caves. Submerged or partially submerged caves are an Annex 1 habitat listed under the Habitats directive. Caves vary in size, from only a few metres to more extensive systems, which may extend hundreds of metres into the rock. There may be tunnels or caverns with one or more entrances, in which vertical and overhanging rock faces provide the principal marine habitat. Sea cave communities vary considerably depending on the structure and extent of the cave system, their degree of submergence and of exposure to sand scour and wave-surge, and their geology. Caves are typically colonised by encrusting animal species but may also support shade-tolerant seaweeds near their entrances. Physical conditions, such as inclination, wave surge, scour and shade, change rapidly from cave entrance to the inner parts of a cave, and this often leads to a marked gradation in the communities present. Surveys were set up to identify a baseline and trial survey methodologies in order to establish surveillance and monitoring programmes for the feature. 24 caves (and tunnels) were described. They include caves that are wholly Intertidal, wholly subtidal and ones with both littoral and sublittoral elements. They range from caves that extend 1-3 meters into the cliff to ones that extend up to 100 meters into the cliff. Inventorial survey as a first step for CCW to develop sensitivity management and monitoring for submerged or partially submerged caves. 24 caves across Pembrokeshire Marine Special Area of Conservation (SAC), Cardigan Bay SAC, Pen Llyn a'r Sarnau SAC and Menai Strait and Colwyn Bay SAC. All measurements were taken to a standard protocol as described in the CCW Marine Monitoring Report no. 6. Specimens were fixed and preserved. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian CCW Marine Monitoring Team Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ originator MarineSeen Estuary Cottage, Bentlass, Hundleton, Pembrokeshire, SA71 5RN, Wales fbunker@marineseen.com http://www.marineseen.com/ originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme cave fauna caves marine monitoring (see also marine surveys) Sea Caves Special Area of Conservation Monitoring theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Habitat extent theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions Part of this dataset is sensitive and restricted. The sensitive data is as follows; Ostrea edulis. Sensitive data must be kept confidential; general release is not permitted due to risk of harm to the environment or third parties. Sensitive data may only be released under an appropriate NRW Licence. Requests should be referred to NRW's Access to Information Officer. Data may be released freely if the sensitive records are removed in advance, or shown only at a coarser scale. no limitations otherRestrictions © CNC/NRW 2002 Recipients may only re-use sensitive data in strict confidence under the terms of an appropriate NRW Licence. No publication or dissemination is permitted, except if sensitive records are removed in advance, or shown only at a coarser scale. vector eng utf8 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision benthic boundary layer NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -5.51358164 -3.67258647 51.45468862 53.43932036 2000-09-28 2002-07-26 12 -9.5 Database [A] Report in word format [B] Site location in excel spreadsheet [C] Site location in MapInfo layer. [D] Species data in Marine Recorder (JNCCMNCR40000961, MRCCW3000000001C), [E] Species data on original forms in paper format. [F] Videos as mini DV tapes [G] Photos as Tiffs and JPGS. dataset 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 2010-12-08 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Phase 2 survey methods were used to describe habitats and communities. Measurements were taken and diagrams produced to show approximate dimensions of the caves and the distribution of the biotopes within them. The caves were marked with pitons or eye bolts to facilitate future monitoring programmes. Cave location was determined by GPS. Video footage was taken in selected caves. Phase 2 survey methods were used to describe habitats and communities. Measurements were taken and diagrams produced to show approximate dimensions of the caves and the distribution of the biotopes within them. The caves were marked with pitons or eye bolts to facilitate future monitoring programmes. Cave location was determined by GPS. Video footage was taken in selected caves.