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biota

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  • In May 2008 (18-27 May), a survey commissioned by JNCC undertook seabed habitat investigations of two Areas of Search (AoS) for offshore SACs. The objectives of this survey, within the Submarine structures in the mid-Irish Sea AoS and the Solan Bank AoS, were to acquire high quality acoustic data capable of identifying and delineating habitats listed under Annex I of the 1992 EC Habitats Directive; primarily the Annex I habitat Submarine structures made by leaking gases in the former AoS and Annex I Reef habitat in the latter AoS. Surveys consisted of both broad-scale and fine-scale acoustic techniques, utilising sidescan sonar and multibeam swathe bathymetry, along with a variety of ground-truthing techniques including towed and drop down video/stills and Hamon grab sampling. A Rock dredge was also used at a few stations in order to gather samples of epibiota from hard substrata to assist with the taxonomic identification of the video and still images. The range of sampling techniques employed ensured that any Annex I habitats could be adequately described and characterised. For both AoSs survey planning and interpretation of survey data utilised extensive pre-existing data sets.

  • An important task undertaken this year was to define sub-regional areas of the ICES greater North Sea eco-region. The sub-regional areas correspond to meaningful eco-logical units whose boundaries are defined by strong gradients in their physical oceanography, such as changes in depth, sediment transport, salinity, oxygen and currents. The four sub-regions of the ICES greater North Sea eco-region are; i. North-ern North Sea, ii. Southern North Sea, iii. Skagerrak and Kattegat, and iv. English Channel

  • Marine communities of the coast of El Hierro .

  • Cette carte des peuplements benthiques subtidaux du secteur Trégor-Goëlo est le résultat du traitement, de l'analyse et de l'agrégation des données des campagnes REBENT 10 et 11 (2006), HALIOTREGOR (2008) et IFR-NEOMYSIS (2011). Deux sources croisées d'acquisition des données ont été employées : un système acoustique embarqué (sondeur multifaisceaux) et remorqué (sonar à balayage latéral), permettant de définir des premières classes de signatures acoustiques, correspondant à des unités morpho-sédimentaires, complétées par des campagnes de prélèvements à la benne (échantillons sédimentaires biologiques) et des profils vidéo.

  • Data that contributed to the MB0102 Task 2I English intertidal habitats dataset.

  • Under the MeshAtlantic project (2010-2013) the habitat of an area offshore Portimão (south coast of Portugal) was classified. The biological data was gathered from surveys carried out during 2012. Stratified sampling by depth and bottom substrate was performed using Van Veen grab and beam trawl to estimate fauna densities. Additional and significant data was obtained from image analysis of video records collected during Remote Operated Vehicle (ROV) surveys carried out under the UALG/CCMAR programme. Both these surveys began with a previous acoustic mapping of the seabed by means of Side Scan Sonar and Multi-beam, followed by sediment type classification and ground truthing validation using Van Veen grab sampling.

  • Emu Limited was commissioned by Natural England to carry out an acoustic and ecological survey of the subtidal zone (areas below the Mean Low Water mark) within the Solent Maritime Special Area of Conservation (SAC). The remit of the survey was to produce data and maps characterising the overall subtidal seabed surface topography, surface sediment composition and the main subtidal biotopes which fall within the Solent Maritime SAC's designated boundaries using rapid field assessment techniques with the minimal environmental impact.

  • Data that contributed to the MB0102 Task 2I English intertidal habitats dataset.

  • Within the last 5 years, widespread uptake of multi-beam sonar technology within the offshore survey industry has meant that swath bathymetry is becoming economic even within the nearshore region. As a result, the Southeast Strategic Regional Coastal Monitoring Programme has been able to upgrade their single-beam bathymetric surveys to achieve 100% seafloor coverage to IHO Order 1a standard through collaboration with the Maritime and Coastguard Agencyâ??s Civil Hydrography Programme. Although the main purpose is to survey the bathymetry of the seabed, the full coverage bathymetry combined with acoustic backscatter information collected during the swath bathymetry survey can be integrated with ground-truthing information to produce a series of detailed maps.

  • Mapping the distribution of maerl in South Uist, Western Isles was a collaborative study between Scottish Natural Heritage and the BioMar Programme. The survey used acoustic techniques, video drops, ROV, grab samples and diver surveys. The result was a map of predicted biotope distribution.