4f4c4942-4343-5764-6473-313135323935 English 2024-05-31T09:38:30.923Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) The Function and Restoration of Biogenic Reefs Formed by Sabellaria alveolata The Function and Restoration of Biogenic Reefs Formed by Sabellaria alveolata Gweithrediad ac adferiad creigresi biogenig a ffurfiwyd gan Sabellaria alveolata 2013-03-31 NRW_DS115295 The honeycomb worm Sabellaria alveolata is an example of a species that forms large well-consolidated reef structures. However, as the known area of S. alveolata covers less than 0.5 % of the coastline of the United Kingdom it is considered a fairly rare species. Individuals and reefs are typically found on the low to mid-shore of the intertidal zone, but have also been found in subtidal areas. In sufficient densities, individual tubes of S. alveolata coalesce to form biogenic structures that may reach several kilometres in length. These reefs can provide an important habitat for other benthic vertebrates and invertebrates (La Porta and Nicoletti 2009), as well as offering lesser studied benefits, including sediment entrainment/consolidation and potentially reducing wave energy transfer to the top of the shore. The purpose of this data capture was to investigate the role S. alveolata has on coastal dynamics along with providing new baseline data directed towards the monitoring of the biogenic reefs. The honeycomb worm Sabellaria alveolata is an example of a species that forms large well-consolidated reef structures. However, as the known area of S. alveolata covers less than 0.5 % of the coastline of the United Kingdom it is considered a fairly rare species. Individuals and reefs are typically found on the low to mid-shore of the intertidal zone, but have also been found in subtidal areas. In sufficient densities, individual tubes of S. alveolata coalesce to form biogenic structures that may reach several kilometres in length. These reefs can provide an important habitat for other benthic vertebrates and invertebrates (La Porta and Nicoletti 2009), as well as offering lesser studied benefits, including sediment entrainment/consolidation and potentially reducing wave energy transfer to the top of the shore. The purpose of this data capture was to investigate the role S. alveolata has on coastal dynamics along with providing new baseline data directed towards the monitoring of the biogenic reefs. University of Wales, Bangor. School of Ocean Sciences Bangor, Gwynedd, LL57 2DG oss011@bangor.ac.uk http://www.bangor.ac.uk University of Wales, Bangor. School of Ocean Sciences Bangor, Gwynedd, LL57 2DG oss011@bangor.ac.uk http://www.bangor.ac.uk University of Wales, Bangor. School of Ocean Sciences Bangor, Gwynedd, LL57 2DG oss011@bangor.ac.uk http://www.bangor.ac.uk sd">Species distribution Habitats and biotopes Species distribution GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme sabellaria alveolata polychaete worms honeycomb worm 3rd Party Data Third Party Data NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat extent Habitat characterisation SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml This dataset was collected by Bangor University as part of a contract for Natural Resources Wales (NRW). NRW may provide access to this dataset on request in some circumstances. However, enquirers are advised to obtain a copy from the owner/originator directly, rather than NRW. NRW may NOT publish or disseminate it in its entirety. no limitations © Natural Resources Wales (NRW) 2013. NRW does NOT grant permission to third parties to re-use or disseminate this dataset. Those seeking such permission should approach the originator directly. English biota SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -5.777741 -2.608865 51.240829 53.512067 2012-01-10 2013-02-28 The function and restoration of biogenic reefs formed by sabellaria alveolata Documents The report is held as a Word Document, data is held within Excel spreadsheets and images are held as .jpeg Files. 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 false Detailed field observations were undertaken at three reef sites within Wales, see Geographic Coverage for site area. Each of the sites were photographed using aerial photography. Wave attenuation was assessed using high-resolution pressure sensors capable of measuring water depth at less than 5 mm accuracy in water depths of up to 15 m at a rate of four samples per second. Sensors were deployed at the three sample sites in two transects, one sensor before a reef structure and one sensor up shore, above the reef structure. Two sensors were placed at the same shore heights in an area where reef was absent to act as a control. To supplement wave exposure measurements, two further approaches were also employed. The first was plaster clod dissolution. Shore stability was assessed by observing the movement of labelled cobbles at each site. Two lines of cobbles (n = 10) were lain out at identical shore heights across the on and off-reef areas. These were tagged with dGPS with a residence time of 1 minute that provides a post-processed horizontal accuracy of approximately 30 cm. Cobbles were left for several tidal cycles before being located and re-tagged with the dGPS. The distance moved was calculated using great circle distance calculations in Microsoft Excel. Vortex resuspension tanks were also used within the investigation as well as investigating larval settlement and growth through induced spawning. Detailed field observations were undertaken at three reef sites within Wales, see Geographic Coverage for site area. Each of the sites were photographed using aerial photography. Wave attenuation was assessed using high-resolution pressure sensors capable of measuring water depth at less than 5 mm accuracy in water depths of up to 15 m at a rate of four samples per second. Sensors were deployed at the three sample sites in two transects, one sensor before a reef structure and one sensor up shore, above the reef structure. Two sensors were placed at the same shore heights in an area where reef was absent to act as a control. To supplement wave exposure measurements, two further approaches were also employed. The first was plaster clod dissolution. Shore stability was assessed by observing the movement of labelled cobbles at each site. Two lines of cobbles (n = 10) were lain out at identical shore heights across the on and off-reef areas. These were tagged with dGPS with a residence time of 1 minute that provides a post-processed horizontal accuracy of approximately 30 cm. Cobbles were left for several tidal cycles before being located and re-tagged with the dGPS. The distance moved was calculated using great circle distance calculations in Microsoft Excel. Vortex resuspension tanks were also used within the investigation as well as investigating larval settlement and growth through induced spawning.