NRW_DS114942 eng NRW_DS109834 dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T12:51:15 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Intertidal Monitoring of Piddock Beds in Carmarthen Bay and Estuaries Special Areas of Conservation (SACs) 2009 Intertidal Monitoring of Piddock Beds in Carmarthen Bay and Estuaries Special Areas of Conservation (SACs) 2009 Gwaith Monitro Rhynglanwol ar Welau Pidogau yn ACA Bae Caerfyrddin ac Aberoedd 2009 2009 CCW / ASML Carmarthen Bay SAC intertidal piddock bed monitoring MRCCW16300000022 2012-06-30 publication 4f4c4942-4343-5764-6473-313134393432 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. This data was captured to support a number of reporting requirements. These were namely reporting on conservation status of the piddock feature; mapping the boundary of the clay and peat exposures; to record the density of the piddock holes; and evaluate the best sampling methods. Carmarthen Bay SAC was designated for five Annex I intertidal habitat features: Estuaries; Mudflats and sandflats not covered by seawater at low tide; Large shallow inlets and bays; Salicornia and other annuals colonising mud and sand; Atlantic salt meadows (Glauco- Puccinellietalia maritimae). Specific areas of interest include the peat and clay beds burrowed by piddocks and the monitoring aimed to map the boundary of the clay/peat exposures, record the density of the piddock holes and evaluate the best sampling methods. 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. This data was captured to support a number of reporting requirements. These were namely reporting on conservation status of the piddock feature; mapping the boundary of the clay and peat exposures; to record the density of the piddock holes; and evaluate the best sampling methods. Carmarthen Bay SAC was designated for five Annex I intertidal habitat features: Estuaries; Mudflats and sandflats not covered by seawater at low tide; Large shallow inlets and bays; Salicornia and other annuals colonising mud and sand; Atlantic salt meadows (Glauco- Puccinellietalia maritimae). Specific areas of interest include the peat and clay beds burrowed by piddocks and the monitoring aimed to map the boundary of the clay/peat exposures, record the density of the piddock holes and evaluate the best sampling methods. 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). Marine and Freshwater Ecosystems Group Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@ccw.gov.uk http://www.ccw.gov.uk originator Aquatic Survey and Monitoring Ltd (ASML) Whitfield Brow, Bollihope, Frosterley, Weardale, Co. Durham, DL13 2SZ, England tom@aquatic-environments.co.uk http://www.marineseen.com/aquatic_survey_and_monitoring.htm 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 theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Clay Carmarthen Bay and Estuaries SAC intertidal Peat Piddocks theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat extent Zoobenthos taxonomy-related counts theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions). no limitations otherRestrictions © CNC/NRW and © Crown copyright 2012. All rights reserved. Natural Resources Wales, AC0000849444. Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS. vector eng utf8 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision benthic boundary layer NRW Geographic Identifiers Collection 2024-01-01 publication SIR GAERFYRDDIN - CARMARTHENSHIRE -4.61313101 -4.59765121 51.73297817 51.73877622 2009-09-20 2009-09-21 Documents A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] MapInfo GIS layers in MapInfo Native format (Tables): - Boundaries of peat and clay outcrops - Position of the sample stations [C] Excel spreadsheets with transect physical and species data [D] Photographs of the area, sites, samples and quadrats. [E] Marine Recorder file [MRCCW16300000022]. 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 The bed was divided into three blocks (western, eastern, central) and to sample randomly thrown quadrats (0.25 m2) within each block. In the event, it was found that the piddock distribution was clumped along the edges of channels and thus the randomly thrown quadrats were missing most of the piddocks. Because of this, part of the way through the exercise the method was adapted to targeting areas of piddock holes rather than sampling the whole clay exposure. In addition to the quadrat work, a number of timed counts of piddock holes were also carried out, with the intention of making a comparison between the two approaches to help with planning future monitoring work. Piddock beds were first mapped at Marros Sands near Pendine and Whiteford Point on the north Gower coast during Phase 1 surveys carried out by CCW in 2000.The piddock beds are vulnerable to shifting beach sand, a natural phenomenon. No beds were found at Whiteford Point in 2009, although monitored previously in 2004. Data quality and confidence is considered high as all surveys were completed by professional and experienced marine field surveyors. Piddock beds were first mapped at Marros Sands near Pendine and Whiteford Point on the north Gower coast during Phase 1 surveys carried out by CCW in 2000. The bed was divided into three blocks (western, eastern, central) and to sample randomly thrown quadrats (0.25 m2) within each block. In the event, it was found that the piddock distribution was clumped along the edges of channels and thus the randomly thrown quadrats were missing most of the piddocks. Because of this, part of the way through the exercise the method was adapted to targeting areas of piddock holes rather than sampling the whole clay exposure. In addition to the quadrat work, a number of timed counts of piddock holes were also carried out, with the intention of making a comparison between the two approaches to help with planning future monitoring work. Piddock beds were first mapped at Marros Sands near Pendine and Whiteford Point on the north Gower coast during Phase 1 surveys carried out by CCW in 2000.The piddock beds are vulnerable to shifting beach sand, a natural phenomenon. No beds were found at Whiteford Point in 2009, although monitored previously in 2004. Data quality and confidence is considered high as all surveys were completed by professional and experienced marine field surveyors. Piddock beds were first mapped at Marros Sands near Pendine and Whiteford Point on the north Gower coast during Phase 1 surveys carried out by CCW in 2000.