CEFAS697e2edd-c5c3-4d89-b84c-f8e5e7c62586 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 2025-11-06T12:57:57 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Phytoplankton abundance data for Spring and Autumn of 2018 in the Celtic Sea 2021-06-30 publication 2025-11-06 revision 2020-02-26 creation CEFAS20364 https://data.cefas.co.uk Phytoplankton abundance data collected on the RV Cefas Endeavour as part of CEND05_18 and CEND17_18, CEND03_19 and CEND04_19. Samples were collected for use in eutrophication assessments and to test the Ferrybox water sampler. These samples were analysed at CEFAS. Samples were collected using three different methods: ( 1.)Manually from a rosette. ( 2.)Manually from the continuous flow. ( 3.)Automatically with a water sampler attached to the Ferrybox. 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 Department for Environment, Food and Rural Affairs (DEFRA) defra.helpline@defra.gov.uk owner notPlanned Monitoring Plankton GEMET, version 1.0 2008-06-01 publication Phytoplankton SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Water column 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 **Publicly available data licensed under the Open Government Licence v3.0 (`https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)`_ – Please note the applicable attribution statement is as follows: ‘includes Crown copyright, Cefas 2021'** .. _`https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)`: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ English biota -8.00 -2.50 49.75 52.50 2013-10-12 2014-11-01 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/20364 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 Species Distribution – 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 Sample collection methods: ( 1.)Samples were collected from Niskin bottles fired at depth, transferred into a 500 ml container and fixed with 2-3 ml of 25% acidified Lugol's iodine solution. ( 2.)Samples were collected from the continuous flow ferrybox water supply (approx. 4m water depth) in a 500 ml container and fixed with 2-3 ml of 25% acidified Lugol's iodine solution. ( 3.)150ml water samples were collected from the surface underway system using an automated Cefas Technology Limited water sampler into polyethylene bags which had 2.5 ml of 25% acidified Lugol's iodine solution added. Sample analysis: All phytoplankton samples collected underwent full taxonomic analysis in house, using a light microscope and following the Utermöhl method (Paxinos and Mitchell, 2000) on a 25 ml of sample. The identification was done at the species level whenever possible, and the results reported as number of cells per litre. Phytoplankton taxa and abundance were determined after sedimentation of the samples in 25 ml glass chambers, and using an inverted microscope (Utermöhl 1931). Size of most common taxon were measured with a micrometer and used for calculating cell volume and biomass (µgC l-1). Using the measurements collected from all the samples, average cell volume (μm3) of each taxon were calculated using geometric formulas given by Edler (1979), except for the genus Ceratium. Volume of the latter was calculated according to Thomsen (1992). To convert cell volume to carbon (pg C) the equations of Menden-Deuer and Lessard (2000) were used. When cell measurements were not available for a given taxon, the cell carbon contents suggested by Harrison et al. (2015) were used in the calculations. Due to difficulties in determining cell abundance in colonies, the carbon content of Phaeocystis colonies was determined from the radius of the colony, adopting the relationship of Verity et al. (2007). Estimates of biomass were combined with the abundance data to calculate the biomass per litre. Abundances and carbon contents of phytoplankton taxa were grouped based on functional groups (e.g. centric diatoms, pennate diatoms). The trophic status of dinoflagellates (i.e. autotrophic or heterotrophic) was not determined therefore dinoflagellates were included as part of the phytoplankton (rather than microzooplankton). MEDIN 3.1.1