{
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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS110284.jsonld",
    "identifier": "NRW_DS110284",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS110284",
    "name": "Volunteer Diver Seagrass Zostera marina Surveys, Llyn Peninsula and Milford Haven (2008)",
    "description": "In areas where conditions are suitable seagrass beds form and these are considered nationally important in the UK. Seagrasses are thought to help stabilising the seabed in addition to providing organic matter, shelter and food for a variety of fish, birds and invertebrates. Seagrass beds are vital nursery grounds for flatfish, and in some areas also for cephalopods. They are also known to be sensitive to changes in water quality and human disturbance. Seagrass beds have been designated as a UK Biodiversity Action Plan Habitat (underpinned by the Convention of Biological Diversity, Rio Earth Summit 1992), and as a Habitat of Principal Importance for the Conservation of Biological Diversity in Wales (NERC Act 2006: Section 42). The survey was due to be expanded in 2009 to other areas within the Pen Llyn a'r Sarnau Special Area of Conservation (SAC) and methodologies refined. 1. Develop methods to look at damage to seagrass beds caused by anchor chains compared to permanent moorings. 2. 'Ground-truth' aerial photographs of Porth Dinllaen and Milford Haven subtidal seagrass beds. 3. Test methods of measuring extent of large seagrass beds using volunteers. 4. Estimate density and measure depth of live seagrass in different parts of the bed. 5. Make note of any unusual feature of the seagrass bed.",
    "includedInDataCatalog": {
        "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld"
    },
    "conditionsOfAccess": [
        "access: This data is jointly owned by NRW and Marine Conservation Society. In addition to this the following data is also considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. There are no access restrictions on this data. However there are third party use restrictions. There are no access restrictions to this data. NRW may release, publish or disseminate it freely.",
        "access: no limitations",
        "use: \u00a9 CNC/NRW and Marine Conservation Society \u00a9 Crown copyright. All rights reserved. Natural Resources Wales, AC0000849444 Data may be re-used under provision and in line with the terms of a NRW licence. Those seeking commercial re-use require a commercial licence available from the OS."
    ],
    "temporalCoverage": "2008-06-14/2008-09-12",
    "keywords": [
        {
            "@type": "DefinedTerm",
            "identifier": "http://inspire.ec.europa.eu/theme/sd",
            "name": "Species distribution"
        },
        {
            "@type": "DefinedTerm",
            "name": "anchor damage"
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        {
            "@type": "DefinedTerm",
            "name": "zostera marina"
        },
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            "name": "Milford Haven"
        },
        {
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            "name": "Pen Llyn a'r Sarnau cSAC"
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        {
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            "name": "eelgrass"
        },
        {
            "@type": "DefinedTerm",
            "name": "Pembrokeshire Marine SAC"
        },
        {
            "@type": "DefinedTerm",
            "name": "Porth Dinllaen"
        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/ACNT/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "ACNT",
            "name": "Macroalgae and seagrass taxonomy-related counts"
        },
        {
            "@type": "DefinedTerm",
            "name": "Volunteers"
        }
    ],
    "spatialCoverage": {
        "@type": "Place",
        "geo": {
            "@type": "GeoShape",
            "box": "51.65708797 -5.17878131 52.98846479 -4.02760943"
        },
        "additionalProperty": [
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                "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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        "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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