PANGAEA_997204 Molecular indices, phytoplankton community composition and associated environmental parameters along the West Antarctic Peninsula in summer 2023 Fisher, Ben J; Seidel, Michael; Waite, Nicole; Manning, Miah Lynne; Cappola, Michael; Dittmar, Thorsten; Schofield, Oscar; Poulton, Alex J; Henley, Sian Frances Molecular indices, phytoplankton community composition and associated environmental parameters along the West Antarctic Peninsula in summer 2023 2026-09-18 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.997204 Investigator Ben J Fisher b.fisher@hw.ac.uk Earth Science Event label LATITUDE LONGITUDE DEPTH, water DATE/TIME Salinity Temperature, water Fluorescence Carbon, organic, dissolved Nitrogen, total dissolved Carbon, organic, dissolved, solid phase extractable Nitrogen, organic, dissolved, solid phase extractable Sulfur, organic, dissolved, solid phase extractable Phosphorus, organic, dissolved, solid phase extractable δ13C, organic matter, dissolved, solid phase extractable Mass of molecular formulas Oxygen/Carbon ratio Hydrogen/Carbon ratio Aromaticity index, modified Carbon Hydrogen Oxygen Nitrogen Sulfur Phosphorus Double bond equivalent Highly unsaturated compounds Unsaturated compounds Saturated compounds Degradation index Index of photodegradation Index of biological formation and transformation Diatomaceae pennales, biovolume Diatomaceae centrales, biovolume Cryptophyta, biovolume Dinoflagellates, biovolume Flagellates indeterminata, biovolume Phytoplankton, non diatoms, biovolume geoscientificInformation CTD/Rosette d13C Dissolved Organic Matter field observations FT-ICR MS LMG2301 LMG2301_C1 LMG2301_C2 LMG2301_C3 LMG2301_C4 LMG2301_C5 LMG2301_C6 LMG2301_S1 LMG2301_S2 LMG2301_S3 LMG2301_S4 Phytoplankton composition ship-based Southern Ocean stoichiometry CTD, Sea-Bird, SBE 911plus Fluorometer, WET Labs Inc., ECO FLRTD High-temperature catalytic combustion, Shimadzu, Shimadzu TOC-VCPH equipped with TDN unit Inductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS), Agilent 7500c Isotope ratio mass spectrometer, Thermo Fisher Scientific, Delta V Advantage [ConFlo III interface]; coupled to elemental analyzer, Carlo Erba, NA 2500 Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) Imaging Flow Cytobot (IFCB), McLane Research Laboratories Inc. Laurence M. Gould 2023-01-04 2023-01-28 Complete -69.82935 -64.60813 -78.48554 -64.39954 2.410836735 m (DEPTH, water) 3050.243327 m (DEPTH, water) Palmer-LTER Palmer Long-Term Ecological Research unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 1810 data points text/tab-separated-values Bercovici, Sarah; Wiemers, Maren; Dittmar, Thorsten; Niggemann, Jutta (2023): Disentangling Biological Transformations and Photodegradation Processes from Marine Dissolved Organic Matter Composition in the Global Ocean. Environmental Science & Technology, 57(50), 21145-21155, https://doi.org/10.1021/acs.est.3c05929 Dittmar, Thorsten; Koch, Boris P; Hertkorn, Norbert; Kattner, Gerhard (2008): A simple and efficient method for the solid-phase extraction of dissolved organic matter (SPE-DOM) from seawater. Limnology and Oceanography-Methods, 6(6), 230-235, https://doi.org/10.4319/lom.2008.6.230 Flerus, Ruth; Lechtenfeld, Oliver Jens; Koch, Boris P; McCallister, S Leigh; Schmitt-Kopplin, Philippe; Benner, Ronald H; Kaiser, Karl; Kattner, Gerhard (2012): A molecular perspective on the ageing of marine dissolved organic matter. Biogeosciences, 9(6), 1935-1955, https://doi.org/10.5194/bg-9-1935-2012 Koch, Boris P; Dittmar, Thorsten (2006): From mass to structure: an aromaticity index for high-resolution mass data of natural organic matter. Rapid Communications in Mass Spectrometry, 20(5), 926-932, https://doi.org/10.1002/rcm.2386 Sosik, Heidi (2016): IFCB-Analysis Software System, Version 2.0 [software]. zenodo, https://zenodo.org/records/153978

As part of the Palmer LTER research program during a 24 day period across January 2023, we conducted oceanographic CTD sampling at 10 sites across the West Antarctic Peninsula (4 on the shelf, 6 on the coast), with a view to link different marine phytoplankton communities to distinct molecular signatures of solid phase extracted (SPE) dissolved organic matter. We include ultrahigh resolution mass spectrometry (Fourier-transform ion cyclotron resonance mass spectrometer, FT-ICR-MS) data, molecular indicies calculated from these data (IPhoto, IDeg, IBio), isotopic (SPE-DOM-d13c) and stoichiometric (SPE-DOC,SPE-DON,SPE-DOS,SPE-DOP) values. These parameters were then compared against the biovolume abundance of different phytoplankton groups, determined through Imaging Flow Cytobot (IFCB) analysis. Additionally, we include basic environmental data (DOC, TDN, Fluorescence, Temperature, Salinity). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.997204"! ** Supported by the Antarctic Science International Bursary, "Is Southern Ocean dissolved organic matter export influenced by phytoplankton community composition?" https://www.antarcticsciencebursary.org.uk

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME http://www.marinespecies.org/aphia.php?p=taxdetails&id=146222 Flagellates indeterminata, biovolume https://doi.org/10.1002/rcm.2386 Aromaticity index, modified https://doi.org/10.1002/rcm.2386 From mass to structure: an aromaticity index for high-resolution mass data of natural organic matter https://doi.org/10.1021/acs.est.3c05929 Disentangling Biological Transformations and Photodegradation Processes from Marine Dissolved Organic Matter Composition in the Global Ocean https://doi.org/10.4319/lom.2008.6.230 A simple and efficient method for the solid-phase extraction of dissolved organic matter (SPE-DOM) from seawater https://doi.org/10.5194/bg-9-1935-2012 A molecular perspective on the ageing of marine dissolved organic matter https://en.wikipedia.org/wiki/RV_Laurence_M._Gould Laurence M. Gould https://pallter.marine.rutgers.edu/ Palmer-LTER https://vocab.nerc.ac.uk/collection/L22/current/TOOL1588/ Imaging Flow Cytobot (IFCB), McLane Research Laboratories Inc. https://www.seabird.com/products/sbe-911plus-ctd?id=60761421595&callback=qs CTD, Sea-Bird, SBE 911plus https://zenodo.org/records/153978 IFCB-Analysis Software System, Version 2.0 PANGAEA_997313 DIF 9.4 2026-09-18 2026-09-18