05a0feebc935744db63ec62e78f98754 English dataset Peter Tinsley Dorset Wildlife Trust Living Seas Manager Enquiries@derc.org.uk pointOfContact 2021-02-04 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::4326 2000 National Oceanography Centre Southampton (NOC), Portland Harbour to Ringstead, Dorset, Seagrass and Sea pen video sledge survey 2013-01-25 publication MRLRC00100000550 Survey run by Dr Ken Collins of the NOC (Southampton) on behalf of Dorset Wildlife Trust. These records all relate to 'Collins, K., Johnson, M., Mallinson, J. and Markey, M. (2000) Seagrass (Zostera marina) and Sea Pen (Virgularia mirabilis) surveys, Portland Harbour to Ringstead, Dorset' A copy of the report is held at Dorset Environmental Records Centre. The main focus of this work was a video sledge survey of Portland Harbour. A colour video camera was towed at 1-2 knots over the seabed of the Harbour. Tracks at 200m spacing were followed through the whole of the Harbour with the exception of the port exclusion zone and around a very large vessel moored in the centre of the harbour. In the shallow, western part of the harbour, the survey was extended to the extent of the low water springs. Differential GPS positions were continuously recorded against the video time code. A detailed study of the Portland Harbour video records has been made by Mike Johnson as part of his BSc dissertation - see references for full title. The survey vessel is based in Poole Harbour and en route to Portland Harbour tows were made from off Ringstead to Weymouth Bay. In the very shallow waters off Ringstead, a small 4m inflatable was used to tow a sledge with a self contained camcorder in underwater housing. Here, positions were recorded using a handheld GPS unit. Please note, these records have also been incorporated into subsequent reports written by the same author. The survey data entered into this database has been supplied electronically by Dr. Ken Collins. Dr. Ken Collins National Oceanography Centre (NOC), Southampton kjc@noc.soton.ac.uk originator Carolyn Steele Dorset Environmental Record Centre Record Centre Manager c.a.steele@dorsetcc.gov.uk custodian notPlanned Database Documents Marine Environmental Data and Information Network NDGO0005 Habitats and biotopes Land cover Species distribution GEMET - INSPIRE themes, version 1.0 2008-01-06 revision Habitats and biotopes INSPIRE THEMES 2011-02-16 creation Marine UNESCO 2003-01-01 creation Zoobenthos taxonomic abundance Habitat characterisation Seabed photography SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Data is freely available for research or commercial use providing that the originators are acknowledged in any publications produced. otherRestrictions No restrictions to public access English biota imageryBaseMapsEarthCover biota Charting Progress 2 Sea Areas 2009-06-18 creation Eastern Channel Charting Progress 2 Sea Areas 2009-06-18 creation Western Channel and Celtic Sea ICES Rectangles 2009-05-01 creation 29E7 ICES Rectangles 2009-05-01 creation 30E7 ICES Rectangles 2009-05-01 creation 29E8 ICES Rectangles 2009-05-01 creation 30E8 -2.4657 -2.3410 50.5680 50.6337 1999-08-09 1999-08-20 Carolyn Steele Dorset Environmental Record Centre Record Centre Manager c.a.steele@dorsetcc.gov.uk distributor dataset Survey run by Dr Ken Collins of the NOC (Southampton) on behalf of Dorset Wildlife Trust. These records all relate to 'Collins, K., Johnson, M., Mallinson, J. and Markey, M. (2000) Seagrass (Zostera marina) and Sea Pen (Virgularia mirabilis) surveys, Portland Harbour to Ringstead, Dorset' A copy of the report is held at Dorset Environmental Records Centre. The main focus of this work was a video sledge survey of Portland Harbour. A colour video camera was towed at 1-2 knots over the seabed of the Harbour. Tracks at 200m spacing were followed through the whole of the Harbour with the exception of the port exclusion zone and around a very large vessel moored in the centre of the harbour. In the shallow, western part of the harbour, the survey was extended to the extent of the low water springs. Differential GPS positions were continuously recorded against the video time code. A detailed study of the Portland Harbour video records has been made by Mike Johnson as part of his BSc dissertation - see references for full title. The survey vessel is based in Poole Harbour and en route to Portland Harbour tows were made from off Ringstead to Weymouth Bay. In the very shallow waters off Ringstead, a small 4m inflatable was used to tow a sledge with a self contained camcorder in underwater housing. Here, positions were recorded using a handheld GPS unit. Please note, these records have also been incorporated into subsequent reports written by the same author. The survey data entered into this database has been supplied electronically by Dr. Ken Collins.