4f4c4942-4343-5764-6473-313032303336 English NRW_DS109834 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-10-19T14:41:36.051Z NRW 1.0 wel utf8 British National Grid (EPSG::27700) Intertidal Monitoring of Eelgrass Zostera noltii Beds in Carmarthen Bay 2004 Intertidal Monitoring of Eelgrass Zostera noltii Beds in Carmarthen Bay 2004 Monitro Rhynglanwol: Zostera noltii ym Mae Caerfyrddin yn 2004 2004 CCW / IECS Carmarthen Bay & Estuaries SAC Zostera noltii survey (MRCCW31600000006) 2009-01-31 NRW_DS102036 http://naturalresources.wales/ The seagrass Zostera is a flowering plant typically found in sheltered areas with a muddy / sandy substratum. Zostera beds are of significant ecological importance in that they support a diverse community of infaunal and epibenthic species, algal and epiphytic species and provide refuge and feeding sites for fish and crustaceans (particularly juveniles). Furthermore, Zostera beds are an important food source for wildfowl (e.g. Brent geese). Zostera beds can be an important factor in coastal defence. The root networks stabilise the sediment, while the plants encourage sedimentation through sediment particle trapping and a certain degree of wave attenuation. This together with their role in supporting commercially valuable fish and crustacean species means that Zostera beds are also of economic importance. However human activity in the coastal zone (pollution, dredging boat mooring etc) can affect its distribution or even destroy the beds completely. The purpose of this data capture was to determine and map the extent, density and condition of Zostera noltii identified in previous years at Llanrhidian Sands and Penrhyn Gwyn in the Burry Inlet, record any damage or disease of the Zostera, record the presence of epiphytes and ephemeral algal species on the beds, record the presence of mussel crumble, and develop an index of damage. The seagrass Zostera is a flowering plant typically found in sheltered areas with a muddy / sandy substratum. Zostera beds are of significant ecological importance in that they support a diverse community of infaunal and epibenthic species, algal and epiphytic species and provide refuge and feeding sites for fish and crustaceans (particularly juveniles). Furthermore, Zostera beds are an important food source for wildfowl (e.g. Brent geese). Zostera beds can be an important factor in coastal defence. The root networks stabilise the sediment, while the plants encourage sedimentation through sediment particle trapping and a certain degree of wave attenuation. This together with their role in supporting commercially valuable fish and crustacean species means that Zostera beds are also of economic importance. However human activity in the coastal zone (pollution, dredging boat mooring etc) can affect its distribution or even destroy the beds completely. The purpose of this data capture was to determine and map the extent, density and condition of Zostera noltii identified in previous years at Llanrhidian Sands and Penrhyn Gwyn in the Burry Inlet, record any damage or disease of the Zostera, record the presence of epiphytes and ephemeral algal species on the beds, record the presence of mussel crumble, and develop an index of damage. 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 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=/ 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/ Coastal Assessment Liaison and Monitoring (CALM) Ti Cara, Point Lane, Cosheston, Pembrokeshire, SA72 4UN, Wales jon@ticara.co.uk <!--No website --> 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 Carmarthen Bay and Estuaries SAC Marine Recorder Zostera bed, extent quadrats NRW Thesaurus 2026-08-27 geonetwork.thesaurus.local.theme.converted_nrw-keywords Macroalgae and seagrass infection and damage 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 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence 100 English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -4.246302878 -4.104366981 51.61654647 51.6713407 2004-09-13 2004-09-15 Intertidal monitoring of eelgrass Zostera noltii in the Burry Inlet, Carmarthen Bay and estuaries SAC in 2004 Database Marine Recorder Online - Version 2.09.02 Marine Recorder 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 Sites were chosen as broad areas where Zostera noltii had previously been recorded. At each site transect lines (100 m apart) were chosen to correspond with specific northing lines and sampling was carried out at 25 m intervals due west or due east of these transect lines. At each sample position, a GPS coordinate and photograph was taken and a 50 cm x 50 cm quadrat was used for recording percentage cover of Z. noltii, cover of Enteromorpha sp., mussel crumble (small aggregations of mussels, cockles and shell debris) and the associated faunal species (visible on the surface). A brief description of the substratum was also noted and the presence and severity of wasting disease (Labyrinthula zosterae) recorded, based on a scale produced by Burdick et al. (1993). The CCW intertidal phase 1 survey recorded the Zostera noltii in the Burry Inlet during the year 2000. IECS surveys provide a further understanding of the resource in the Burry Inlet. Sites were chosen as broad areas where Zostera noltii had previously been recorded. At each site transect lines (100 m apart) were chosen to correspond with specific northing lines and sampling was carried out at 25 m intervals due west or due east of these transect lines. At each sample position, a GPS coordinate and photograph was taken and a 50 cm x 50 cm quadrat was used for recording percentage cover of Z. noltii, cover of Enteromorpha sp., mussel crumble (small aggregations of mussels, cockles and shell debris) and the associated faunal species (visible on the surface). A brief description of the substratum was also noted and the presence and severity of wasting disease (Labyrinthula zosterae) recorded, based on a scale produced by Burdick et al. (1993). The CCW intertidal phase 1 survey recorded the Zostera noltii in the Burry Inlet during the year 2000. IECS surveys provide a further understanding of the resource in the Burry Inlet.