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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/NRW_DS102026.jsonld",
    "identifier": "NRW_DS102026",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=NRW_DS102026",
    "name": "Intertidal Monitoring of the Number and Extent of Sea Caves, Pen Llyn ar Sarnau Special Area of Conservation (SAC) 2004",
    "description": "Submerged or partially submerged sea caves are included as an Annex I type within the EU Habitats Directive (92/43/EEC). These caves may vary in size and exposure, and thus the communities associated with them vary considerably depending on the structure and extent of the cave system. Sea caves generally provide habitat for colonies of encrusting animal species, but may also have shade-tolerant algal communities at their mouth. Caves on the shore and in the shallow sublittoral zone are frequently subject to conditions of strong wave surge and tend to have floors of coarse sediment, cobbles and boulders. These materials are often highly mobile and scour the cave walls. Caves that are subject to strong wave surge are characterised by communities of mussels Mytilus edulis, barnacles Balanus crenatus, cushion sponges, encrusting bryozoans and colonial ascidians, depending on the degree of water movement and scour at particular points in the cave system. The UK has the most varied and extensive inshore sea caves on the Atlantic coast of Europe. In Wales, sea caves are important within the Pen Llyn a'r Sarnau SAC and are therefore a qualifying feature, but not a primary reason for the site selection. As such there is a requirement to assess the number and extent of intertidal sea caves within this SAC. Further background information on the surveying of sea caves in Welsh SACs can be found in Bunker and Holt (2003). Sea caves are important within the Pen Llyn a'r Sarnau SAC and are a qualifying feature. As such there is a requirement to assess the number and extent of intertidal sea caves within this SAC. The specific aims of the survey were to identify and map the location of sea caves along the coastline, use digital photography to record their extent and to measure the threat from in-fill by the railway company.",
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    "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 2009. 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": "2004-07-07",
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            "name": "Special Areas of Conservation (SAC) - SAC monitoring"
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            "name": "Pen Llyn a'r Sarnau SAC"
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            "termCode": "HBEX",
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            "name": "Habitat characterisation"
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            "box": "52.679615 -4.072959 52.686696 -4.05875"
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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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