CEFASbecee742-66b5-4a4d-bbcc-cb4d62599359 English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2024-07-12T12:57:01 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Fladen experimental fishing impact recovery data - Sediment profile imagery 2019-04-04 publication 2024-07-12 revision 2019-03-18 creation CEFAS19707 https://data.cefas.co.uk Biological (presence of infauna, tubes) and physical (apparent redox potential discontinuity (aRPD) layer, penetration depth, surface roughness) parameters measured, and a Benthic Habitat Quality Index assessment, from sediment profile images of the seabed with associated station information. The sediment profile images were acquired from a self-contained photographic system at sampling stations located within six experimental boxes (three treatments and three control) during a fishing impact recovery survey within the Fladen Grounds. Data were collected at three time points (before impact (time 0), immediately after impact (time 1) and 8 months after impact (time 2) during two research surveys on the RV Cefas Endeavour in April 2015 and November 2015. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) data.manager@cefas.co.uk owner notPlanned Seabed photography SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Benthos Sediment GEMET, version 1.0 2008-06-01 publication Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Sediment SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Public data - no limitations to reuse English environment 0.00 0.50 58.00 58.25 2015-04-18 2015-12-03 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/19707 Cefas Data Portal download The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols. dataset INSPIRE Data Specification on Habitats and Biotopes – Technical Guidelines 2013-12-10 publication false See the referenced specification Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication true See the referenced specification The camera system is a self-contained photographic system used for collecting *in-situ* images of the sediment/water interface. The system comprises a Nikon D100 digital camera, 35 mm lens, water filled prism, a self- contained strobe light, adjustable penetration stops, adjustable fall rate, and a stainless-steel construction frame. The frame also possesses mud doors to facilitate the use of the camera in low shear-strength muds. The supporting frame lands on the seabed first, leaving the area directly under the prism undisturbed. As the winch wire is slackened, the prism cradle descends toward the seabed at a controlled rate, and as the wedge-shaped prism enters the muddy bottom, it is driven into the sediment by its weight. The piston ensures that the prism enters the bottom slowly and does not disturb the sediment - water interface. On impact with the seabed, a trigger activates a time delay on the camera shutter release and two photographs are taken. Once the images are acquired, tension on the winch wire raises the prism cradle to the up position, a wiper blade cleans off the face plate, the strobe is recharged and the system can be lowered for another image. The camera system was ‘hopped’ over the seabed providing a series of images along a transect (5 hops spaced 5 m apart resulting in 10 images per station) at a subset of three stations within each experimental box. From each of the three stations within the experimental boxes, five images (one from each hop) were analysed to determine penetration depth, surface roughness and aRPD, using the well-established semi-automated Java macro within *ImageJ* (Version 1.46r). Ten percent of the images were processed by two analysts to ensure quality. The average aRPD, penetration depth and surface roughness was then calculated for each station within an experimental box. MEDIN 3.1.1