{
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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS109891.jsonld",
    "identifier": "NRW_DS109891",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS109891",
    "name": "Acoustic Monitoring of the Extent of the North Llyn Modiolus Reef",
    "description": "Biogenic horse mussel (Modiolus Modiolus) reef is an important feature of the Pen Llyn a'r Sarnau Special Area of Conservation (SAC). The reef has high biodiversity and is vulnerable to anthropogenic activities, such as benthic fishing. The mussel reef forms an undulating surface that is significantly different to the surrounding seabed and therefore acoustic monitoring methods can be used to monitor changes in extent and identity areas of potential damage. Work is carried out on the north Llyn horse mussel reef in Pen Llyn a'r Sarnau jointly by Countryside Council for Wales (CCW) and University of Wales Bangor. The purpose of this data capture was to: - Measure extent and temporal changes within the of the Modiolus reef in the Pen Llyn a'r Sarnau SAC. - Investigate the health of the reef and for signs of anthropogenic activity within the area. An area approximately 10km by 6km, adjacent to the Pen Llyn coast, south-west of Porth Dinllaen, approximately 1.5km off shore was surveyed. All data is processed to reduce errors (e.g. positional corrections). Acoustic data is subject to ground-truthing using drop down videos captured as part of a separate project. As of April 1st, 2013 data is held and managed by Natural Resources Wales (NRW).",
    "includedInDataCatalog": {
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    },
    "conditionsOfAccess": [
        "access: This data is jointly owned by NRW and the University of Wales, Bangor. There are no access restrictions to this data. NRW may release, publish or disseminate it freely.",
        "access: no limitations",
        "use: \u00a9 CNC/NRW and Bangor University 2013 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 the copyright of NRW / Bangor University 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."
    ],
    "temporalCoverage": "1998-07-07/2013-04-01",
    "keywords": [
        {
            "@type": "DefinedTerm",
            "identifier": "http://inspire.ec.europa.eu/theme/hb",
            "name": "Habitats and biotopes"
        },
        {
            "@type": "DefinedTerm",
            "name": "horse mussel"
        },
        {
            "@type": "DefinedTerm",
            "name": "Special Area of Conservation Monitoring"
        },
        {
            "@type": "DefinedTerm",
            "name": "Pen Llyn a'r Sarnau cSAC"
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            "name": "multibeam"
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            "name": "biogenic reef"
        },
        {
            "@type": "DefinedTerm",
            "name": "modiolus modiolus"
        },
        {
            "@type": "DefinedTerm",
            "name": "acoustic observation (acoustic monitoring)"
        },
        {
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            "name": "sidescan sonar"
        },
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            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/SSCN/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "SSCN",
            "name": "Side-scan sonar"
        },
        {
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            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/SABB/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "SABB",
            "name": "Shellfish abundance and biomass in water bodies"
        }
    ],
    "spatialCoverage": {
        "@type": "Place",
        "geo": {
            "@type": "GeoShape",
            "box": "52.90351843 -4.71395825 52.98355757 -4.58178064"
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                "termCode": "1_4",
                "name": "Irish Sea"
            },
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                "identifier": "http://vocab.nerc.ac.uk/collection/C19/current/UKMDN027/",
                "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/C19/current/",
                "termCode": "UKMDN027",
                "name": "Cardigan Bay"
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                "termCode": "UKMDN028",
                "name": "Tremadog Bay"
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    "author": [
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        "url": "https://portal.medin.org.uk/portal/",
        "name": "Marine Environmental Data and Information Network (MEDIN)",
        "description": "The MEDIN portal contains information about 19493 marine datasets from over 600 UK organisations. Metadata are an enduring resource and contact details are publicly available for a long time. \r\n\t\tPlease contact us (enquiries@medin.org.uk) if you find your contact details on the MEDIN portal and do not consent to this. \r\n\t\tYou can now use our GitHub repository to report issues or access related documents. Metadata records are updated daily and were last updated 2026-04-19. Record deletion takes place weekly and the latest occurred 2026-04-12."
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