{
    "@context": "https://schema.org",
    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS102010.jsonld",
    "identifier": "NRW_DS102010",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS102010",
    "name": "Intertidal Monitoring of Eelgrass (Zostera marina) Beds in Pen Llyn ar Sarnau Special Areas of Conservation (SACs) in 2004/2005",
    "description": "The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. Seagrass beds develop in intertidal and shallow subtidal areas on sands and muds. They may be found in marine inlets and bays but also in other areas, such as lagoons and channels, which are sheltered from significant wave action. Eelgrass (Zostera marina), is considered to be scarce (present in 16-100 ten km squares) is protected through the EC Habitats Directive and is classed as a UK Biodiversity Action Plan (BAP) Priority Habitat. In particular, seagrass meadows are used as a refuge area by several juvenile commercially important fish species, and similarly provide an important food source for wildfowl such as Brent geese. As a result of their dense root networks, together with a certain degree of wave attenuation and the trapping of sediment particles which further encourages sedimentation, seagrass beds help to stabilise the underlying substratum, thereby playing an important role in terms of coastal defence and the reduction of coastal erosion (Davison and Hughes, 1998). As such, in addition to their biological function and conservation importance, they are also of considerable economic importance. Human activity in the coastal zone (pollution, dredging boat mooring etc) can affect seagrass distribution or even destroy the beds completely. The purpose of this data capture was to map the current known intertidal extent of the Zostera biotope, develop a survey methodology to determine grass density, record damage to the beds caused by physical impacts, develop an index of disease and record species (epibiota) on the Zostera and adjacent sediment.",
    "includedInDataCatalog": {
        "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld"
    },
    "conditionsOfAccess": [
        "access: There are no access restrictions to this data. NRW may release, publish or disseminate it freely.",
        "access: no limitations",
        "use: \u00a9 CNC/NRW 2008. 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 NRW'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": "2004-07-06/2005-08-07",
    "keywords": [
        {
            "@type": "DefinedTerm",
            "identifier": "http://inspire.ec.europa.eu/theme/sd",
            "name": "Species distribution"
        },
        {
            "@type": "DefinedTerm",
            "name": "eelgrass"
        },
        {
            "@type": "DefinedTerm",
            "name": "Porth Dinllaen"
        },
        {
            "@type": "DefinedTerm",
            "name": "marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)"
        },
        {
            "@type": "DefinedTerm",
            "name": "seagrasses (see also potamogetonaceae and hydrocharitaceae)"
        },
        {
            "@type": "DefinedTerm",
            "name": "Special Areas of Conservation (SAC) - SAC monitoring"
        },
        {
            "@type": "DefinedTerm",
            "name": "Porth Fechan"
        },
        {
            "@type": "DefinedTerm",
            "name": "Black Rock Sands"
        },
        {
            "@type": "DefinedTerm",
            "name": "zostera marina"
        },
        {
            "@type": "DefinedTerm",
            "name": "posidoniaceae"
        },
        {
            "@type": "DefinedTerm",
            "name": "Pen Llyn a'r Sarnau SAC"
        },
        {
            "@type": "DefinedTerm",
            "name": "zostera"
        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/HBEX/",
            "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/",
            "termCode": "HBEX",
            "name": "Habitat extent"
        }
    ],
    "spatialCoverage": {
        "@type": "Place",
        "geo": {
            "@type": "GeoShape",
            "box": "52.2624067 -4.74780083 53.04936224 -3.98916111"
        },
        "additionalProperty": [
            {
                "@type": "PropertyValue",
                "propertyID": "http://www.opengis.net/def/crs/EPSG/0/27700",
                "value": "National Grid of Great Britain - urn:ogc:def:crs:EPSG::27700"
            }
        ]
    },
    "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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        "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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}