{
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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS111487.jsonld",
    "identifier": "NRW_DS111487",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS111487",
    "name": "Volunteer Diver Seagrass Zostera marina Surveys Porth Dinllaen (2009)",
    "description": "Seagrass is the only marine flowering plant found subtidally in the UK and seagrass beds are considered of National importance. In 2009 Zostera marina was the focus of former Countryside Council for Wales (CCW), now part of Natural Resources Wales (NRW), volunteer dive surveys at Porth Dinllaen in Pen Llyn a'r Sarnau Special Area of Conservation (SAC) to estimate the extent of the bed. The survey is a continuation of a 2008 pilot, and is due to be re-surveyed before 2012 to start to build up a picture of variation in the extent of the seagrass bed at the site. The main objectives of this project were to: 1. Test methods to measure extent of large seagrass beds using volunteers 2. Estimate density and measure depth of live seagrass in different parts of the bed 3. Make note of any unusual features of the seagrass bed 4. Compare with results and success of 2008 surveys.",
    "includedInDataCatalog": {
        "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld"
    },
    "conditionsOfAccess": [
        "access: The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions).",
        "access: no limitations",
        "use: \u00a9 CNC/NRW and \u00a9 Crown copyright 2009. All rights reserved. Natural Resources Wales, AC0000849444 Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS.",
        "use: Contains Natural Resources Wales information \u00a9 Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right."
    ],
    "temporalCoverage": "2009-06-14/2009-07-05",
    "keywords": [
        {
            "@type": "DefinedTerm",
            "identifier": "http://inspire.ec.europa.eu/theme/hb",
            "name": "Habitats and biotopes"
        },
        {
            "@type": "DefinedTerm",
            "name": "eelgrass"
        },
        {
            "@type": "DefinedTerm",
            "name": "posidoniaceae"
        },
        {
            "@type": "DefinedTerm",
            "name": "zostera marina"
        },
        {
            "@type": "DefinedTerm",
            "name": "zostera"
        },
        {
            "@type": "DefinedTerm",
            "name": "Pen Llyn a'r Sarnau cSAC"
        },
        {
            "@type": "DefinedTerm",
            "name": "seagrasses (see also potamogetonaceae and hydrocharitaceae)"
        },
        {
            "@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": "52.93950272 -4.56605 52.94793877 -4.54814949"
        },
        "additionalProperty": [
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                "@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": [
        {
            "@type": "Organization",
            "name": "Natural Resources Wales (NRW)",
            "description": "owner",
            "email": "enquiries@naturalresourceswales.gov.uk",
            "address": {
                "@type": "PostalAddress",
                "streetAddress": "Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales"
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    "maintainer": [
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    "producer": [
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            "name": "Various including volunteer recorders",
            "description": "originator",
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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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