6676ec60-9e37-45a8-b447-938256438e9f eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2022-12-12 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Mesozooplankton collected by the Bark Europa in Gerlache Strait, Antarctic Peninsula 2022-12-12 creation 2022-12-12 revision 2022-12-12 publication 2022-12-12 released 1.0 https://doi.org/10.5285/6676ec60-9e37-45a8-b447-938256438e9f doi GB/NERC/BAS/PDC/01689 https://data.bas.ac.uk/ Please cite this item as: Tarling, G., Ward, P., Fielding, S., & Noake, A. (2022). Mesozooplankton collected by the Bark Europa in Gerlache Strait, Antarctic Peninsula (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/6676ec60-9e37-45a8-b447-938256438e9f Mesozooplankton was collected with a vertically hauled Nansen 70V net in the Gerlache Strait and vicinity of Anvers Island. The net was deployed to a maximum depth of 50 m through hand-hauling. Specimens were preserved in 4% buffered formalin. Analysis was carried out through light microscopy of the entire sample, and specimens identified to the lowest possible taxonomic level including the identification of developmental stages. Sampling was carried out as part of the REQUEST2021 T.A.S.K. (The Antarctica Scout Krill) project. The Nansen net was provided by the British Antarctic Survey as in-kind support. Sample analysis was carried out by Dr. Peter Ward, an e-fellow at BAS. REQUEST2021 was an official expedition of Kent Scouts (a county of the UK Scout Association), with further support from charitable donations. No credit. completed Tarling, Geraint A. British Antarctic Survey Researcher author Ward, Peter British Antarctic Survey Researcher author Fielding, Sophie British Antarctic Survey Researcher author Noake, Alan Kent Scouts Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates EARTH SCIENCE > Biosphere > Ecological Dynamics EARTH SCIENCE > Oceans > Marine Environment Monitoring theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Antarctic Peninsula Antarctic krill Anvers Island Gerlache Strait Mesozooplankton Nansen net theme Gerlache Strait Antarctica Anvers Island Antarctica place Oceanographic geographical features Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data are released under the Open Government Licence V3.0: otherRestrictions None. doi doi crossReference url url largerWorkCitation url url crossReference textTable eng utf8 biota environment oceans -63.84166 -60.925 -65.01333 -63.86166 2022-01-07 2022-01-13 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/plain text/csv bytes 5939 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=6676ec60-9e37-45a8-b447-938256438e9f WWW:LINK-1.0-http--link Get Data Download data download bytes 5939 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=6676ec60-9e37-45a8-b447-938256438e9f WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Deployments of the Nansen net were carried out through luffing and hauling a rope attached to the net. A measurement of 50 m was marked onto the rope to determine the correct deployment length. The ship was stationary during deployment and local time, latitude and longitude of the sampling station was noted. Net was luffed and hauled by hand, with hauling commencing immediately after reaching the maximum depth. Total deployments were approximately 3 to 5 minutes in duration. On retrieval of the net, the cod end was unclipped from the net and the sample gently decanted into a bucket. The cod-end was further rinsed with seawater taken from the same location to ensure the whole sample had been retrieved from the cod-end. This sample was then concentrated through passing through a 200 µm sieve. The sample concentrate was transferred to a Nalgene bottle of appropriate size so that it comprised no more than 10% of the total volume of the bottle. The bottle was then topped up with 4% buffered formaldehyde and a waterproof label inserted before sealing. Sample analysis was carried out approximately 6 months after sample capture. Samples were transferred out of formalin to water and sorted under a light microscope. All individuals were identified to the lowest possible taxonomic level to generate an abundance value for each individual taxon. This value was converted to a concentration (individuals m-3) through dividing by the volume of water sampled. Volume of water sampled was determined through multiplying the opening area of the net (diameter 0.7 m, sampling area 0.385 m2) by the length of rope deployed (mostly 50 m). Post-analysis, samples were returned to the original formalin for long term curation at the British Antarctic Survey. Data collection: (i) Nansen 70 net (vertically hauled) The specification for the construction of the original N70 net is detailed in Ward et al (2012) following the designed detailed Kemp et al. (1929). The N70 was a 70-cm diameter net used to sample mesozooplankton and constructed with coarse netting and two grades of silk mesh. The upper part of the net was 21 inches (53 cm) of inch (6 mm) knotted mesh followed by a canvas band and then two finer mesh sections both made from Messrs Staniers' Quadruple Extra Heavy Quality Double Twist Swiss Silk bolting cloth, the first 3 feet 200 (96.5 cm) of 40 threads per inch (TPI) and the bottom section 4 feet 500 (136 m) of 74 TPI. (ii) Binocular light microscope Data quality: Deployment depth was estimated according to the length of rope luffed into the water and the angle of the rope relative to vertical. Although 50 m was the nominal maximum depth, maximum depth attained is likely to be less in most instances. A flow meter was not deployed with the net so volume of water sampled was estimated as the product of the opening area (diameter of 0.7 m) of the net and the amount of rope deployed below the sea surface. This will incur an error resulting from any turbulence, upwelling or downwelling currents present during the time of sampling and any clogging and inefficient filtering through the net. Sample analysis was carried out to the lowest possible taxonomic level practicable, which was not always to the species level but sometimes went further also to include developmental stages. asNeeded completed