10.11582/2023.00087 https://ipt.gbif.no/resource?r=nansen_legacy_phytoplankton_cell_and_biomass_flux Yasemin V. Bodur UiT - the Arctic University of Norway Researcher

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yasemin.bodur@uit.no 0000-0001-8758-8617 Anna Maria Dąbrowska Institute of Oceanology Polish Academy of Sciences Researcher

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Agnieska Tatarek Institute of Oceanology Polish Academy of Sciences Researcher

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Józef Maria Wiktor Institute of Oceanology Polish Academy of Sciences Researcher

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Lucie Goraguer Norwegian Polar Institute Researcher

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Ulrike Dietrich UiT - the Arctic University of Norway Researcher

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Camilla Svensen UiT - the Arctic University of Norway Researcher

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Marit Reigstad UiT - the Arctic University of Norway Researcher

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marit.reigstad@uit.no 2023-09-05 eng Samples for protist cell and biomass flux were collected with short-term drifting sediment traps between 75° and 85°N in the northern Barents Sea with R/V Kronprins Haakon in August 2018 as part of the Nansen Legacy project (cruise 2018707, JC 1-2). High-density bottom water was collected at the station and filtered (Whatman GF/F 0.7µm), and then filled into the trap cylinders (KC Denmark, aspect ratio >6) prior to their deployment. Afterwards, the sediment traps were deployed with 2 or 4 cylinders at each depth (30, 40, 60, 90, 120, 200m) for a duration between 22 to 25 hours. Depending on the sea ice conditions, the sediment traps were deployed in open water, anchored to a sea ice floe or within an ice lead. Upon retrieval, the content of the cylinders from each depth was pooled and stored at 4°C in dark until further analyses. For protist examination, a subsample of 100ml was transferred to a brown glass bottle and fixed with a mixture of glutaraldehyde-lugol. Protists were identified to the lowest possible taxonomic level in accordance with the World Register of Marine Species (WoRMS) and counted under an inverted light microscope (Nikon Eclipse TE-300 and Ti-S) using the Uthermöhl method (Edler & Elbrächter, 2010; Utermöhl, 1958). Protist carbon biomass flux was calculated from abundances using established geometric relationships for biovolume conversion (Hillebrand et al., 1999) and biovolume-to-carbon conversion factors (Menden-Deuer & Lessard, 2000). Note: column footprintWKT = ("deployment_latitude deployment_longitude" (always available) , "recovery_latitude recovery_longitude (if available, otherwise NA)" Samplingevent GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License. northern Barents Sea 20 40 83 75 unkown Yasemin V. Bodur UiT - the Arctic University of Norway Researcher

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yasemin.bodur@uit.no 0000-0001-8758-8617 Marit Reigstad UiT - the Arctic University of Norway Researcher

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marit.reigstad@uit.no 2023-08-10T14:40:38.672+00:00 dataset Edler, Lars, and Malte Elbrächter. “The Utermöhl Method for Quantitative Phytoplankton Analysis.” In Microscopic and Molecular Methods for Quantitative Phytoplankton Analysis, 110:13–20. Unesco Pub., 2010. Utermöhl, Hans. “Zur Vervollkommnung Der Quantitativen Phytoplankton-Methodik.” SIL Communications, 1953-1996 9 (January 1, 1958). https://doi.org/10.1080/05384680.1958.11904091. Hillebrand, Helmut, Claus-Dieter Dürselen, David Kirschtel, Utsa Pollingher, and Tamar Zohary. “Biovolume Calculation for Pelagic and Benthic Microalgae.” Journal of Phycology 35 (1999). https://doi.org/10.1046/j.1529-8817.1999.3520403.x. Menden-Deuer, Susanne, and Evelyn J. Lessard. “Carbon to Volume Relationships for Dinoflagellates, Diatoms, and Other Protist Plankton.” Limnology and Oceanography 45 (May 2000). https://doi.org/10.4319/lo.2000.45.3.0569. https://ipt.gbif.no/resource?id=nansen_legacy_phytoplankton_cell_and_biomass_flux/v1.14.xml