Volunteer Diver Seagrass Zostera marina Surveys, Llyn Peninsula and Milford Haven (2008)

• Availability: Not released
• Published by: Marine Environmental Data & Information Network
• Last updated: 31 December 2008
• Topic: Not added
• Licence: Other Licence ; View licence information

Summary

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.

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• Volunteer Diver Seagrass Zostera marina Surveys Porth Dinllaen (2009)
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• Sediment Core Sampling of Seagrass (Zostera) Bed and Sediment Areas in Porth Dinllaen

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• Added to data.gov.uk: 2021-09-03
• Access contraints: 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.
• Harvest GUID: 4f4c4942-4343-5764-6473-313130323834
• Extent: Latitude: 52.98846479° to 51.65708797°
• Extent: Longitude: -5.17878131° to -4.02760943°
• Spatial reference system: urn:ogc:def:crs:EPSG::UTM WGS84
• Dataset reference date: 2008-12-31 (publication)
• Dataset reference date: 2008-06-16 (revision)
• Frequency of update: annually
• Responsible party: Natural Resources Wales (NRW) (custodian); Marine Conservation Society (MCS) (custodian); CCW Marine Monitoring Team (originator); Sea-Search Volunteers (originator)
• ISO 19139 resource type: dataset
• Metadata language: eng
• Source Metadata: XML
• Source Metadata: HTML

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© CNC/NRW and Marine Conservation Society © Crown copyright. All rights reserved. Natural Resources Wales, 100019741 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.