4f4c4942-4343-5764-6473-313135383930 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T17:11:02.113Z NRW 1.0 wel British National Grid (EPSG::27700) The reproduction and connectivity of Sabellaria alveolata reefs in Wales - MAR4REF (2014) The reproduction and connectivity of Sabellaria alveolata reefs in Wales - MAR4REF (2014) Atgynhyrchiad riffiau Sabellaria alveolata yng Nghymru a'r cysylltiad rhyngddynt - MAR4REF (2014) 2015-02-27 NRW_DS115890 The reef building tube worm Sabellaria alveolata is an important ecosystem engineer on UK shorelines and is subsequently protected as a result of its limited spatial distribution in reef form. To effectively manage and reduce impacts on populations resulting from environmental change, more information is required to understand the distribution and development of S. alveolata reefs. The purpose of this data capture was it collect information to help understand the distribution and development of Sabellaria alveolata reefs in order to effectively manage and reduce impacts of populations resulting from environmental change. The associated report presents the findings from a Welsh Government Resilient Ecosystems Fund funded project lead by Bangor University investigating the reproduction and connectivity of S. alveolata reefs along Welsh coastlines. Three key sites for data collation, Llanddulas (north Wales), Aberarth (mid-Wales) and Dunraven (south Wales), but expanded to the regional scale for modelling larval movements between major reef sites throughout the Irish Sea. The main research areas included: 1) Laboratory-based experiments to describe larval behaviour in relation to phototaxis and quantification of swimming speed throughout different larval development stages. 2) We assessed adult fecundity and egg sizes from worms collected from all three study sites every month from February-Sept 2014. 3) We measured larval densities in the water column at all three sites during the theorised reproductive period. 4) We produced estimates of population connectivity for different reef sites within Wales and determined major source and sink sites by using a biophysical model to create estimates of larval movement. The reef building tube worm Sabellaria alveolata is an important ecosystem engineer on UK shorelines and is subsequently protected as a result of its limited spatial distribution in reef form. To effectively manage and reduce impacts on populations resulting from environmental change, more information is required to understand the distribution and development of S. alveolata reefs. The purpose of this data capture was it collect information to help understand the distribution and development of Sabellaria alveolata reefs in order to effectively manage and reduce impacts of populations resulting from environmental change. The associated report presents the findings from a Welsh Government Resilient Ecosystems Fund funded project lead by Bangor University investigating the reproduction and connectivity of S. alveolata reefs along Welsh coastlines. Three key sites for data collation, Llanddulas (north Wales), Aberarth (mid-Wales) and Dunraven (south Wales), but expanded to the regional scale for modelling larval movements between major reef sites throughout the Irish Sea. The main research areas included: 1) Laboratory-based experiments to describe larval behaviour in relation to phototaxis and quantification of swimming speed throughout different larval development stages. 2) We assessed adult fecundity and egg sizes from worms collected from all three study sites every month from February-Sept 2014. 3) We measured larval densities in the water column at all three sites during the theorised reproductive period. 4) We produced estimates of population connectivity for different reef sites within Wales and determined major source and sink sites by using a biophysical model to create estimates of larval movement. 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 University of Wales, Bangor. School of Ocean Sciences Bangor, Gwynedd, LL57 2DG oss011@bangor.ac.uk http://www.bangor.ac.uk Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Population distribution - demography Protected sites Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme honeycomb worm ecological connectivity polychaete worms sabellaria alveolata NRW Thesaurus 2026-03-02 geonetwork.thesaurus.local.theme.converted_nrw-keywords Microzooplankton generic abundance in water bodies Habitat characterisation SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml IPSV Subjects List 2020-11-18 geonetwork.thesaurus.external.theme.subjects NRW SMNR Keywords 2024-06-26 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © 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. English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer; water column England (ENG) Wales (WLS) -7.58769993 3.16991791 60.89777573 49.79267177 2014-02-01 2014-09-30 The reproduction and connectivity of sabellaria alveolata reefs in Wales Documents [A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] Digital video files of modelled distribution and dispersion data. 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 Methodologies included: - Laboratory-based experiments - Experiments and field surveys looking at phototactic behaviour (the movement of a organism to, or away from a light source) - Plankton netting - Measurements of adult fecundity, egg size and larval densities and produce estimates of population connectivity for different reef sites within Wales. Survey, laboratory studies and analyses carried out by staff of the Bangor University. Methodologies included: - Laboratory-based experiments - Experiments and field surveys looking at phototactic behaviour (the movement of a organism to, or away from a light source) - Plankton netting - Measurements of adult fecundity, egg size and larval densities and produce estimates of population connectivity for different reef sites within Wales. Survey, laboratory studies and analyses carried out by staff of the Bangor University.