NRW_DS101993 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 2026-03-03T11:14:27 MEDIN 3.1.2 wel eng utf8 Latitude and Longitude (EPSG::4326) Intertidal Monitoring of Underboulder Communities in the Menai Strait and Conwy Bay Special Area of Conservation (SAC) 2004/2005 Intertidal Monitoring of Underboulder Communities in the Menai Strait and Conwy Bay Special Area of Conservation (SAC) 2004/2005 2005 CCW / IECS Menai Strait and Conwy Bay SAC boulder habitat monitoring MRCCW3020000001D 2004 CCW / IECS Menai Strait and Conwy Bay SAC boulder habitat monitoring MRCCW30200000006 Intertidal Monitoring of underboulder communities in the Menai Strait and Conwy Bay SAC in 2004/2005 Monitoro Rhynglanwol: Cymunedau dan glogfeini yn ACA Y Fenai a Bae Conwy 2013-02-28 publication 4f4c4942-4343-5764-6473-313031393933 The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. A specific feature of the Menai Strait and Conwy Bay SAC are the underboulder communities, which are established in the extensive boulder areas within the SAC. Rich underboulder communities have been recorded and mapped on the rocky intertidal areas of the Menai Strait and an area west of Llandudno. Underboulder communities are also present where there are tide-swept communities that happen to lie on boulder habitats throughout the Menai Strait. Sponge dominated communities have been recorded from boulders and cobbles that are nationally uncommon, hosting a rich faunal turf on tide-swept substrata. The associated report combines the surveys and findings undertaking during 2004 (Boyes and Allen, 2004) and 2005 (Mazik et al. 2005). The report combines both datasets and additional analaysis has been completed using both sets of data. The purpose of this data capture was to - Provide a reference condition on species present at a number of sites within the SAC, - Evaluate the variability between boulders and between sites and attempt to correlate the variability with physical factors, - Identify the best methods for measuring the condition of the underboulder features in the SAC in the future and to evaluate the possible methods by which the impact of boulder turning can be assessed and monitored. The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. A specific feature of the Menai Strait and Conwy Bay SAC are the underboulder communities, which are established in the extensive boulder areas within the SAC. Rich underboulder communities have been recorded and mapped on the rocky intertidal areas of the Menai Strait and an area west of Llandudno. Underboulder communities are also present where there are tide-swept communities that happen to lie on boulder habitats throughout the Menai Strait. Sponge dominated communities have been recorded from boulders and cobbles that are nationally uncommon, hosting a rich faunal turf on tide-swept substrata. The associated report combines the surveys and findings undertaking during 2004 (Boyes and Allen, 2004) and 2005 (Mazik et al. 2005). The report combines both datasets and additional analaysis has been completed using both sets of data. The purpose of this data capture was to - Provide a reference condition on species present at a number of sites within the SAC, - Evaluate the variability between boulders and between sites and attempt to correlate the variability with physical factors, - Identify the best methods for measuring the condition of the underboulder features in the SAC in the future and to evaluate the possible methods by which the impact of boulder turning can be assessed and monitored. 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 Countryside Council for Wales (CCW) Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ originator Hull University. Institute Of Estuarine And Coastal Studies The University of Hull, Cottingham Road, Hull, HU6 7RX iecs@hull.ac.uk http://www.hull.ac.uk/iecs/ 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 Species distribution Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore) Menai Strait and Conwy Bay SAC underboulder Felinheli bait digging (bait collecting) Church Island Ynys Welltog Britannia Bridge Price's Point Beacon Llandudno tideswept Foryd Bay [Y Foryd] Special Areas of Conservation (SAC) - SAC monitoring Britannia Rock under boulder theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © CNC/NRW 2013. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source. 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) -4.306959205 -3.799701661 53.12970507 53.34731882 2004-08-03 2005-05-29 See also: DRAFT - Mazik, K., Musk, W.A., Scott, G, Travers, S., Jones, M. and D.P. Brazier. 2008. Intertidal Monitoring of underboulder communities in the Menai Strait and Conwy Bay SAC. CCW Marine Monitoring report No 36. Documents [A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] MapInfo GIS layer in MapInfo Native format (Tables): - Position of survey stations in the Menai Strait - 2004. - Position of survey stations in the Menai Strait and Llandudno - 2005. - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheets of species data from each site and each facet of each boulder for 2004 and 2005. [D] Photographs at survey stations of site and boulders. [E] Marine Recorder file: MRCCW30200000006, MRCCW3020000001D 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 Boulders were chosen along the same shore height (MLW - MSLW) and within close proximity to each other (where possible); boulders were only selected if they fit within a 0.5m x 0.5m quadrat; a GPS point was taken of each boulder; a photograph was taken of the boulder upper surface then a species list taken; the boulder was then turned, photographed and a species list taken from the underside of the boulder; a note was taken of the time spent compiling the species list; Evidence of boulder turning including photographs, an estimation of the number of turned boulders within a 25 m radius; General site description, together with site specific information (to each boulder) including substratum characteristics (underneath and surrounding the boulder), percentage cover of macroalgae and the presence of standing water. Substratum characteristics included an estimation of the proportion of each major particle size (e.g., boulders, cobbles, gravel, coarse sand, silt), water content and whether or not the sediment was anoxic. The intertidal Phase 1 mapping survey identified the underboulder communities in the Menai Strait as being important for their species richness and extent from 1999 to 2001. Limitations occurred within in-situ identification of species. Boulders were chosen along the same shore height (MLW - MSLW) and within close proximity to each other (where possible); boulders were only selected if they fit within a 0.5m x 0.5m quadrat; a GPS point was taken of each boulder; a photograph was taken of the boulder upper surface then a species list taken; the boulder was then turned, photographed and a species list taken from the underside of the boulder; a note was taken of the time spent compiling the species list; Evidence of boulder turning including photographs, an estimation of the number of turned boulders within a 25 m radius; General site description, together with site specific information (to each boulder) including substratum characteristics (underneath and surrounding the boulder), percentage cover of macroalgae and the presence of standing water. Substratum characteristics included an estimation of the proportion of each major particle size (e.g., boulders, cobbles, gravel, coarse sand, silt), water content and whether or not the sediment was anoxic. The intertidal Phase 1 mapping survey identified the underboulder communities in the Menai Strait as being important for their species richness and extent from 1999 to 2001. Limitations occurred within in-situ identification of species.