4f4c4942-4343-5764-6473-313134353733 English NRW_DS114501 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-05T10:28:58.719Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Marine Algae Sites in Wales: Survey and Inventory of Important and Rare Algae Marine Algae Sites in Wales: Survey and Inventory of Important and Rare Algae Safleoedd algau mor yng Nghymru: Arolwg a Rhestr (algau prin) 2009 to 2011 CCW / MarineSeen Marine Algal Sites in Wales: Survey and Inventory Part 1 MRCCW31200000002 2011-11-30 NRW_DS114573 Several sites around Wales have been highlighted as being of interest for their marine seaweeds, either as species rich sites or for supporting rare, scarce or Biodiversity Action Plan (BAP) species. Many of these sites were designated in 2007 as provisional Important Plant Areas for Algae and all the sites are situated within marine Special Areas of Conservation (SACs) or Sites of Special Scientific Importance (SSSIs). This study was designed to provide an inventory of species at selected sites, which were highlighted as the result of previous surveys, and also to recommend methodologies for future monitoring. Several sites around Wales have been highlighted as being of interest for their marine seaweeds, either as species rich sites or for supporting rare, scarce or Biodiversity Action Plan (BAP) species. Many of these sites were designated in 2007 as provisional Important Plant Areas for Algae and all the sites are situated within marine Special Areas of Conservation (SACs) or Sites of Special Scientific Importance (SSSIs). This study was designed to provide an inventory of species at selected sites, which were highlighted as the result of previous surveys, and also to recommend methodologies for future monitoring. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Bunker MarineSeen, Estuary Cottage, Bentlass, Hundleton, Pembrokeshire, SA71 5RN fbunker@marineseen.com http://www.marineseen.com/ National Museum of Wales National Museum Cardiff, Cathays Park, Cardiff, CF10 3NP, Wales n/a http://www.museumwales.ac.uk/en/home/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme monitoring programmes Sarn Badrig Reef seaweed inventory non-native species Rhosneigr SSSI (Sites of Special Scientific Interest) Llanbedrog Oyster bank (Pwllheli) Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC) Important Plant Areas (IPAs) algae Glanllynnau West Angle Bay Subtidal intertidal herbarium anotrichium barbatum red alga NRW Thesaurus 2026-03-04 geonetwork.thesaurus.local.theme.converted_nrw-keywords Macroalgae and seagrass taxonomy-related counts SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW 2011 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. Some images remain the IPR of Francis Bunker and should be acknowledged appropriately. 10 English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -5.777741 -2.608865 51.240829 53.512067 2010-07-21 2011-03-07 -5 5 The project references work carried out by Brodie et al (2007) " Important Plant Areas for algae: a provisional review of sites and areas of importance for algae in the UK. Plantlife International" and CCW's Across Wales Reef Monitoring: Sarn Badrig and Tremadog Bay). It also contributes to CCW's marine intertidal and subtidal survey and monitoring program. The results of the Sarn Badrig and Tremadog Bay are reported in Holt R. Irving R. Stanwell-Smith D. CCW Cross Wales Reef Monitoring. Sarn Badrig and Tremadog Bay 2007 - 2011 (in draft). Important plant areas for algae : a provisional review of sites and areas of importance for algae in the United Kingdom marine algal sites in Wales : survey and inventory Documents [A] Published summary report - electronic version (PDF and MS Word) [B] Raw data - MS Excel and Marine Recorder version 5 [MRCCW31200000002] [C] Map of locations - MapInfo tables [D] Photos - digital [E] Herbarium specimens 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 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false The sites selected included Rhosneiger, Llanbedrog Low water lagoon, Oyster Bank (Pwllheli), Glanllynnau, Sarn Badrig and Tremadog Bay, and West Angle Bay. - Rhosneigr: An algae specific species inventory was undertaken at rock pools at different levels across the shore. Viewpoint photography was used to illustrate the overall distribution of Ascophyllum nodosum and other fucoid seaweeds on the rocky shore area. A series of monitoring was also conducted on a population of Cystoseira tamariscifolia and other conspicuous species was undertaken, in an area colonised by Sargassum muticum by recording overall percentage cover. - Llanbedrog Low water lagoon: An algae specific species inventory was undertaken during a low spring tide. - The Oyster Bank (Pwllheli): A SCUBA diving survey was conducted for the Barbed Twig Weed (Anotrichium barbatum). An inventory of other species found at the site was made in situ and samples taken for laboratory examination. This survey was also used for a Phase 2 descriptive of the site. - Glanllynnau: SCUBA diving surveys were conducted in both sites to collect a species inventory of the sublittoral fringe and shallow subtidal area. - Sarn Badrig and Tremadog Bay: the work carried out related to quality control of ongoing long term monitoring of the subtidal algal communities. A total of 4 dives recording dives were undertaken and the cumulative number of species were recorded over a period of 1 hour for each dive. - West Angle Bay: An inventory of seaweeds was obtained from 7 habitats selected shore habitats. The sites selected included Rhosneiger, Llanbedrog Low water lagoon, Oyster Bank (Pwllheli), Glanllynnau, Sarn Badrig and Tremadog Bay, and West Angle Bay. - Rhosneigr: An algae specific species inventory was undertaken at rock pools at different levels across the shore. Viewpoint photography was used to illustrate the overall distribution of Ascophyllum nodosum and other fucoid seaweeds on the rocky shore area. A series of monitoring was also conducted on a population of Cystoseira tamariscifolia and other conspicuous species was undertaken, in an area colonised by Sargassum muticum by recording overall percentage cover. - Llanbedrog Low water lagoon: An algae specific species inventory was undertaken during a low spring tide. - The Oyster Bank (Pwllheli): A SCUBA diving survey was conducted for the Barbed Twig Weed (Anotrichium barbatum). An inventory of other species found at the site was made in situ and samples taken for laboratory examination. This survey was also used for a Phase 2 descriptive of the site. - Glanllynnau: SCUBA diving surveys were conducted in both sites to collect a species inventory of the sublittoral fringe and shallow subtidal area. - Sarn Badrig and Tremadog Bay: the work carried out related to quality control of ongoing long term monitoring of the subtidal algal communities. A total of 4 dives recording dives were undertaken and the cumulative number of species were recorded over a period of 1 hour for each dive. - West Angle Bay: An inventory of seaweeds was obtained from 7 habitats selected shore habitats.