4f4c4942-4343-5764-6473-313135313838 English NRW_DS114501 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-12-09T12:37:31.832Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Investigation into Musculus discors Beds in Pen Llyn a'r Sarnau (2011) Investigation into Musculus discors Beds in Pen Llyn a'r Sarnau (2011) 2011 Hopkins Survey of Musculus Discors beds off the Lleyn Peninsula, North Wales MRCCW31600000008 Ymchwiliad i welau Musculus discors ym Mhen Llyn a'r Sarnau 2011 2011-09-30 NRW_DS115188 The aim of this data collection was to provide baseline data on M. discors beds around the LlPeninsula, with four specific aims: Establish the population structure for sample beds from around the LlPeninsula in order to investigate population structure and determine bed longevity. Identify the in-fauna/epi-fauna associated with M. discors beds. Investigate the sedimentation that occurs upon M. discors beds. Provide advice to CCW on whether M. discors should be included within a Local Biodiversity Action Plan for Gwynedd. This survey was carried out as part of a MSc thesis by Lisa Hopkinson in September 2011. To provide baseline data on M. discors beds around the LlPeninsula, with four specific aims: Establish the population structure for sample beds from around the LlPeninsula in order to investigate population structure and determine bed longevity. Identify the in-fauna/epi-fauna associated with M. discors beds. Investigate the sedimentation that occurs upon M. discors beds. Provide advice to CCW on whether M. discors should be included within a Local Biodiversity Action Plan for Gwynedd. To determine M. discors population structure and influence on assemblage structure, twenty six, ten centimetre (cm) diameter cores of M. discors, associated fauna and sediment were collected by Seasearch volunteers on SCUBA from four randomly chosen beds in North Wales.were rinsed through a 63 micrometre (sieve with the sediment, M. discors and in-fauna retained. All liquid was retained for later filtration. M. discors were sorted from the sample and length measured to the nearest 0.1 millimetre (mm) using Vernier callipers with epifauna identified and enumerated (Rees et al., 2008). If present, new recruits were sorted from the sample and measured using a calibrated microscope slide (to the nearest 0.1mm). In cases where there were high numbers of recruits, sub-sampling occurred with the abundance and size of a quarter of the total recruit population determined. All associated fauna were identified to the lowest taxonomic level possible. The aim of this data collection was to provide baseline data on M. discors beds around the LlPeninsula, with four specific aims: Establish the population structure for sample beds from around the LlPeninsula in order to investigate population structure and determine bed longevity. Identify the in-fauna/epi-fauna associated with M. discors beds. Investigate the sedimentation that occurs upon M. discors beds. Provide advice to CCW on whether M. discors should be included within a Local Biodiversity Action Plan for Gwynedd. This survey was carried out as part of a MSc thesis by Lisa Hopkinson in September 2011. To provide baseline data on M. discors beds around the LlPeninsula, with four specific aims: Establish the population structure for sample beds from around the LlPeninsula in order to investigate population structure and determine bed longevity. Identify the in-fauna/epi-fauna associated with M. discors beds. Investigate the sedimentation that occurs upon M. discors beds. Provide advice to CCW on whether M. discors should be included within a Local Biodiversity Action Plan for Gwynedd. To determine M. discors population structure and influence on assemblage structure, twenty six, ten centimetre (cm) diameter cores of M. discors, associated fauna and sediment were collected by Seasearch volunteers on SCUBA from four randomly chosen beds in North Wales.were rinsed through a 63 micrometre (sieve with the sediment, M. discors and in-fauna retained. All liquid was retained for later filtration. M. discors were sorted from the sample and length measured to the nearest 0.1 millimetre (mm) using Vernier callipers with epifauna identified and enumerated (Rees et al., 2008). If present, new recruits were sorted from the sample and measured using a calibrated microscope slide (to the nearest 0.1mm). In cases where there were high numbers of recruits, sub-sampling occurred with the abundance and size of a quarter of the total recruit population determined. All associated fauna were identified to the lowest taxonomic level possible. Hopkinson Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Penglais, Aberystwyth, Ceredigion, SY23 3DA ibers@aber.ac.uk http://www.aber.ac.uk/en/ibers/ Hopkinson Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Penglais, Aberystwyth, Ceredigion, SY23 3DA ibers@aber.ac.uk http://www.aber.ac.uk/en/ibers/ Hopkinson Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Penglais, Aberystwyth, Ceredigion, SY23 3DA ibers@aber.ac.uk http://www.aber.ac.uk/en/ibers/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Habitats and biotopes Habitats and biotopes GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme musculus discors NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Zoobenthos taxonomic abundance Zoobenthos taxonomy-related counts SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml This dataset is wholly owned by Lisa Hopkinson, c/o Aberystwyth University However NRW has received permission to release, publish or disseminate it freely. no limitations © Lisa Hopkinson 2011 There are no access restrictions to this data. NRW have received permission to release, publish or disseminate it freely. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source. English biota SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer GWYNEDD - GWYNEDD -4.6815 -4.6737 52.8892 52.89416 2011-04-30 2011-06-11 18 15.3 urn:ogc:def:datum:EPSG::5100 Sea Level depth is unadjusted and does not take into account tidal height Documents [A] Data is held as an Excel spreadsheet and Marine Recorder (NBN) datafile. Marine Recorder Survey key: [MRCCW31600000008] 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 Four sites sampled by diver operated core. A total of 26 cores (10cm diameter) taken. Samples processed in laboratory - sieved over 63 micron mesh. All fauna retained and then identified and counted. Musculus discors lengths measured. Confidence in this dataset is moderate as an inexperienced surveyor was used with assistance from experienced surveyors. Four sites sampled by diver operated core. A total of 26 cores (10cm diameter) taken. Samples processed in laboratory - sieved over 63 micron mesh. All fauna retained and then identified and counted. Musculus discors lengths measured. Confidence in this dataset is moderate as an inexperienced surveyor was used with assistance from experienced surveyors.