{
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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS101779.jsonld",
    "identifier": "NRW_DS101779",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS101779",
    "name": "A Survey of Native Oyster Beds (Ostrea edulis) in Wales",
    "description": "The native flat oyster Ostrea edulis is a UK and Welsh Biodiversity Action Plan (BAP) species, for which a UK action plan exists. Native oysters have a long history of over-exploitation in Wales and elsewhere in the UK. Oyster fisheries around Wales declined during the early 1900's due to intense exploitation, possibly combined with disease and poor recruitment. Significant oyster beds are now restricted to only a few locations. The remaining oyster population in Wales are under threat through increased fishery effort in the existing oyster fishery and from diversification of fishing activities in the fisheries. The purpose of this data capture was to gather data on the distribution and abundance of oysters in locations known to currently support native oyster beds; and, to collect samples of oysters for age analysis and to gather data on the marine biodiversity associated with oyster beds. This dataset also helps towards a further understanding of the ecology of native oysters as well as informing management decisions (part of the UK and Welsh Biodiversity Action Plan (BAP).",
    "includedInDataCatalog": {
        "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld"
    },
    "conditionsOfAccess": [
        "access: Part of this dataset is sensitive and restricted. The sensitive data is as follows; Ostrea edulis, Oyster bed habitat. Sensitive data must be kept confidential; general release, is not permitted due to risk of harm to the environment or third parties. Sensitive data may only be released under a CCW Restricted Release Licence. Requests should be referred to CCW's Access to Information Officer. Data may be released freely if the sensitive records are removed in advance, or shown only at a coarser scale.",
        "access: no limitations",
        "use: \u00a9 CNC/NRW NRW does NOT grant permission to third parties to re-use or disseminate this dataset."
    ],
    "temporalCoverage": "2002-09-13/2002-09-18",
    "keywords": [
        {
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            "identifier": "http://inspire.ec.europa.eu/theme/sd",
            "name": "Species distribution"
        },
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        },
        {
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            "name": "oysters"
        },
        {
            "@type": "DefinedTerm",
            "name": "ostrea edulis"
        },
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            "name": "species distribution"
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            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "SATM",
            "name": "Shellfish morphology, age and physiology"
        }
    ],
    "spatialCoverage": {
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        "geo": {
            "@type": "GeoShape",
            "box": "51.09492187 -4.51377693 51.71466995 -2.73779093"
        },
        "name": [
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                "termCode": "1_4",
                "name": "Irish Sea"
            },
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                "identifier": "http://vocab.nerc.ac.uk/collection/C19/current/UKMDN011/",
                "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/C19/current/",
                "termCode": "UKMDN011",
                "name": "Swansea Bay"
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                "identifier": "http://vocab.nerc.ac.uk/collection/C19/current/UKMDN027/",
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                "termCode": "UKMDN027",
                "name": "Cardigan Bay"
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                "identifier": "http://vocab.nerc.ac.uk/collection/C19/current/UKMDN014/",
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                "termCode": "UKMDN014",
                "name": "St. Brides Bay"
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        "additionalProperty": [
            {
                "@type": "PropertyValue",
                "propertyID": "http://www.opengis.net/def/crs/EPSG/0/27700",
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    "author": [
        {
            "@type": "Organization",
            "name": "Natural Resources Wales (NRW)",
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                "streetAddress": "Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales"
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        "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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}