{
    "@context": "https://schema.org",
    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS110069.jsonld",
    "identifier": "NRW_DS110069",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS110069",
    "name": "Assessment of the Impact of Hydraulic Cockle Dredging on the Macroinvertebrate Faunas of Traeth Lafan (1993-1994)",
    "description": "This dataset contains the results of a macroinvertebrate and sediment survey conducted post hydraulic cockle dredging around Traeth Lafan, North Wales. The purpose of this data collection was to study the effects of hydraulic suction dredging on benthic invertebrate macrofaunas, substrate conformation and sediment composition on Traeth Lafan. The survey was located at Traeth Lafan, the northern entrance to the Menai Strait (Menai Strait and Colwyn Bay Special Area of Conservation (SAC)). A survey of the macroinvertebrates and sediments of Traeth Lafan, North Wales, was undertaken following extensive hydraulic cockle dredging in autumn 1993. The survey covered the site allocated for dredging and part of the hand gathering area, which was used as 'control', against which changes on the dredged ground could be compared. A follow up survey, using the same sampling grid and rationale, was carried out twelve months later, in November 1994, to ascertain the recovery state of the area after a full season's recruitment.",
    "includedInDataCatalog": {
        "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld"
    },
    "conditionsOfAccess": [
        "access: There are no access restrictions to this data. CCW may release, publish or disseminate it freely.",
        "access: no limitations",
        "use: \u00a9 CCGC/CCW 1995. 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 CCW'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."
    ],
    "temporalCoverage": "1993-12-12/1994-12-29",
    "keywords": [
        {
            "@type": "DefinedTerm",
            "identifier": "http://inspire.ec.europa.eu/theme/sd",
            "name": "Species distribution"
        },
        {
            "@type": "DefinedTerm",
            "name": "cockle dredging (hydraulic dredging)"
        },
        {
            "@type": "DefinedTerm",
            "name": "macroinvertebrates"
        },
        {
            "@type": "DefinedTerm",
            "name": "benthic species"
        },
        {
            "@type": "DefinedTerm",
            "name": "Lafan sands (Lavan sands)(Traeth Lafan)"
        },
        {
            "@type": "DefinedTerm",
            "name": "marine and freshwater inventory"
        },
        {
            "@type": "DefinedTerm",
            "name": "marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments)"
        },
        {
            "@type": "DefinedTerm",
            "name": "Menai Strait"
        },
        {
            "@type": "DefinedTerm",
            "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"
        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/SSTR/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "SSTR",
            "name": "Sedimentary structure"
        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/GP087/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "GP087",
            "name": "Fishery characterisation"
        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/MNGS/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "MNGS",
            "name": "Sediment grain size parameters"
        }
    ],
    "spatialCoverage": {
        "@type": "Place",
        "geo": {
            "@type": "GeoShape",
            "box": "53.24506231 -4.07804031 53.25916295 -4.00676046"
        },
        "additionalProperty": [
            {
                "@type": "PropertyValue",
                "propertyID": "http://www.opengis.net/def/crs/OGC/1.3/CRS84",
                "value": "urn:ogc:def:crs:EPSG:4326"
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    "author": [
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            "name": "Natural Resources Wales (NRW)",
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            "email": "enquiries@naturalresourceswales.gov.uk",
            "address": {
                "@type": "PostalAddress",
                "streetAddress": "Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales"
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        "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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