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135 record(s)
 
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  • A composite Habitats Directive Annex I feature extent map of Submarine structures made by leaking gases for the Croker Carbonate Slabs cSAC/SCI was created by JNCC staff to provide the most up-to-date knowledge of MDAC coverage within the site. Existing polygon data from three previous surveys (CEND1108, CEND0513 and CEND2315) and habitat maps were combined with groundtruthing point information, to build a composite understanding of “High” and “Potential” Annex I feature within the site.

  • Subtidal Habitat Mapping from multibeam data. Maritime and Coastguard Agency survey (various contractors), no groundtruthing.

  • Broadscale habitat (EUNIS level 3) for Land's End (Runnels Stone) recommended Marine Conservation Zone (rMCZ) Updated habitat map resulting from an intergrated analysis of the acoustic and ground-truth survey data from 2013 (onboard the Coastal Survey Vessel (CSV) Water Guardian on cruise wgdn0112). Sediment types at each groundtruthing station were used to inform a semi-automated process of map production using object-based image analysis (OBIA).

  • Broadscale habitat (EUNIS level 3) for the Goodwin Sands recommended Marine Conservation Zone (rMCZ).Seabed texture polygons mapped using semi automated ISO cluster unsupervised classification and expert interpretation of acoustic data (MBES bathymetry and backscatter) and groundtruthing data from PSA analysis and image (stills and video) classification.

  • A Natural England commissoined verification survey of intertidal sediments within the Skerries Bank and Surrounds rMCZ. Phase I Biotope mapping was carried out across the rMCZ for broad scale habitats. Phase II Infaunal sampling was carried out to provide information on the benthic infaunal assemblages and particle size distribution of the study sites by means of core sampling. Sediment surface scrapes were obtained for heavy metals and organic contaminants analysis. The data was used to produce a EUNIS Level 3 boradscale habitat map of the Skerries Bank and Surrounds rMCZ.

  • Subtidal Habitat Mapping from multibeam data. Maritime and Coastguard Agency survey (various contractors), no groundtruthing.

  • A biotope analysis of Dundrum bay was conducted in 2015 as part of efforts to understand the distribution and extent of benthic habitats and associated marine life within the Murlough special area of conservation incorporating new and historical groundtruthing information alongside modern acoustic data. The map was originally presented in the Marine Habitat Classification for Britain & Ireland (http://jncc.defra.gov.uk/MarineHabitatClassification). This has been translated to the EUNIS habitat classification system for integration with other European datasets. For more information, see: AFBI, 2015. Bathymetric and Habitat Map for Murlough Special Area of Conservation and offshore, Northern Ireland. Report to the Department of the Environment.

  • JNCC requested that BGS carry out geostatistical analysis of sediment sample data from the CEND 8/12 survey of Swallow Sand MCZ and CEND 6/13 survey of South-west Deeps (West) MCZ in order to produce maps of sediment distribution in the sites. For each of the MCZ a geostatistical analysis of the data is reported leading to the selection of a robust linear model of corregionalization for the composition of the sediment, based on the additive log-ratio transformation of data on mud, sand and gravel content. This model is then used for spatial prediction on a 250-m grid. At each grid node a prediction distribution is obtained, conditional on neighbouring data and the selected model. By sampling from this distribution, and back-transforming onto the original compositional simplex of the data, we obtain a conditional expectation for the proportions of sand, gravel and mud at each location, a 95% confidence interval for the value at each node, and the probability that each of the four sediment texture classes that underly the EUNIS habitat classification is found at the node.

  • A Natural England commissioned verification survey. Littoral biotope survey and condition assessment of the Lynher Estuary SSSI. The purpose of the study was to establish a physical and biological baseline dataset to facilitate an assessment of favourable condition status of littoral sediment habitats of the SSSI site, as well as identifying species and biotopes that are representative and/or notable within the Lynher Estuary, in particular the distribution and extent of saltmarsh. The study comprised of Phase I and Phase II surveys. Phase I comprised of groundtruthing aerial photography to establish the distribution and extent of intertidal biotopes, interest features and species. Followed by Phase II; detailed descriptions of biotopes present , flora and fauna species list and abundance, as well as sediment characteristics by means of box-core sampling. The data was used to produce a detailed biotope map of the Lynher Estuary.

  • Monitoring survey undertaken by EMU on behalf of Tarmac Marine Dredging Ltd. The primary aim of the survey was to undertake a repeat monitoring survey of the Licence Areas 435/396 and adjacent Black Bream Nest areas. Subtidal Habitat Mapping from multibeam data. Ground truthing using drop down video.