NRW_DS112290 eng NRW_DS114501 dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T12:51:21 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Intertidal Monitoring of Sediment Flats in Menai Strait and Conwy Bay Special Area of Conservation (SAC) in 2008 Intertidal Monitoring of Sediment Flats in Menai Strait and Conwy Bay Special Area of Conservation (SAC) in 2008 Gwaith monitro rhynglanwol ar wastadeddau gwaddodion yn ACA Y Fenai a Bae Conwy yn 2008 2008 CCW / ASML Menai Strait and Conwy Bay SAC Foryd Bay survey MRCCW16300000019 2010-06-30 publication 4f4c4942-4343-5764-6473-313132323930 Menai Strait and Conwy Bay Special Area of Conservation (SAC) is designated for five Annex 1 habitats: Sandbanks which are slightly covered by sea water all the time, Mudflats and sandflats not covered by seawater at low tide, Reefs, Large shallow inlets and bays and Submerged or partially submerged sea caves. Of these mudflats, sandflats and reefs are the main habitats of interest within intertidal areas of Menai Strait and Conwy Bay SAC. Conservation objectives for these habitats are given in the Regulation 33 advice for the SAC. The overriding objective of the survey was to establish the reference condition for the Menai Strait and Conwy Bay SAC and develop monitoring stations for recording the level of natural change. This would enable the development of conservation objectives for the appropriate management of the features of the SAC. Menai Strait and Conwy Bay Special Area of Conservation (SAC) is designated for five Annex 1 habitats: Sandbanks which are slightly covered by sea water all the time, Mudflats and sandflats not covered by seawater at low tide, Reefs, Large shallow inlets and bays and Submerged or partially submerged sea caves. Of these mudflats, sandflats and reefs are the main habitats of interest within intertidal areas of Menai Strait and Conwy Bay SAC. Conservation objectives for these habitats are given in the Regulation 33 advice for the SAC. The overriding objective of the survey was to establish the reference condition for the Menai Strait and Conwy Bay SAC and develop monitoring stations for recording the level of natural change. This would enable the development of conservation objectives for the appropriate management of the features of the SAC. 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 CCW Marine Monitoring Team Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ 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 Habitats and biotopes Species distribution theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme sediment flats Infauna zostera marina zostera seagrasses (see also potamogetonaceae and hydrocharitaceae) eelgrass intertidal zostera angustifolia theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat extent Zoobenthos taxonomy-related counts Zoobenthos generic abundance theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © 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. 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 YNYS MON - ISLE OF ANGLESEY -4.38040387 -4.06375467 53.09414966 53.28790562 2008-06-02 2008-06-06 Documents [A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] Excel spreadsheets of data - MS and CB 2008 Foryd Bay Data V2.xls. Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats [C] Marine Recorder file. [D] A series of MapInfo GIS layers in MapInfo Native format (Tables) MS and CB 2008 Core Sample Details.Tab and MS and CB 2008 Foryd Bay Data V2.Tab [E] Photographs of the site, stations and core contents. 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 Grid Maker tool in the MapInfo GIS package was used to create a grid of 47 stations across the defined survey area, with a north-south distance of 200 m between points and an east-west distance of 330 m. This gave the most appropriate coverage of the flats to enable sampling of the range of biotopes on the Phase 1 map with the manpower available. On site, each survey pair was allocated a section of the grid to survey and GPS units were used to navigate to each station in turn. Where possible, a single 0.01 m2 core sample was taken at each survey station. If the station happened to lie on a rocky outcrop, in a drainage channel or in a pool greater than ~5 cm deep, then a core sample was not taken. The core sample was sieved using a 0.5 mm mesh sieve in a nearby pool. The contents of the sieve were then inspected closely, with the aid of a magnifying glass. All visible animals were identified and counted, to the extent achievable, by the most experienced surveyor in the pair. Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC between 1999 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Considerable historical data exists on the intertidal habitats and communities present at many sites in the SAC, including Y Foryd, Traeth Lafan and the tide-swept boulder shores of the Menai Strait. Methodological trials and surveys, designed for the purposes of SAC monitoring, have been carried out in recent years. Of particular relevance to this report are the surveys of tide-swept boulder biotopes at sites on the Menai Strait (Boyes and Allen 2004, Mazik et al. 2005) and a report of boulder monitoring stations established by ASML/CCW in 2007 (Moore 2008), and a survey of the Zostera noltii bed in Y Foryd (Boyes, Proctor and Mitchell 2004). All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high. The Grid Maker tool in the MapInfo GIS package was used to create a grid of 47 stations across the defined survey area, with a north-south distance of 200 m between points and an east-west distance of 330 m. This gave the most appropriate coverage of the flats to enable sampling of the range of biotopes on the Phase 1 map with the manpower available. On site, each survey pair was allocated a section of the grid to survey and GPS units were used to navigate to each station in turn. Where possible, a single 0.01 m2 core sample was taken at each survey station. If the station happened to lie on a rocky outcrop, in a drainage channel or in a pool greater than ~5 cm deep, then a core sample was not taken. The core sample was sieved using a 0.5 mm mesh sieve in a nearby pool. The contents of the sieve were then inspected closely, with the aid of a magnifying glass. All visible animals were identified and counted, to the extent achievable, by the most experienced surveyor in the pair. Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC between 1999 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Considerable historical data exists on the intertidal habitats and communities present at many sites in the SAC, including Y Foryd, Traeth Lafan and the tide-swept boulder shores of the Menai Strait. Methodological trials and surveys, designed for the purposes of SAC monitoring, have been carried out in recent years. Of particular relevance to this report are the surveys of tide-swept boulder biotopes at sites on the Menai Strait (Boyes and Allen 2004, Mazik et al. 2005) and a report of boulder monitoring stations established by ASML/CCW in 2007 (Moore 2008), and a survey of the Zostera noltii bed in Y Foryd (Boyes, Proctor and Mitchell 2004). All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high.