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. 2019 Feb 5;9:1424. doi: 10.1038/s41598-018-38059-4

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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POC, C and N assimilation in the phytoplankton community. Relative particulate organic carbon (POC) >0.7 µm (a), identified organisms >3 µm (b), carbon assimilation (c), proportion between nitrate and ammonium assimilation (d), nitrate assimilation (e) and ammonium assimilation (f), during September incubations. Assimilation rates are noted for Asterionellopsis glacialis, other chain-forming diatoms 5–20 µm, Chaetoceros spp. >8 µm, Tripos/Ceratium spp., not assigned (65% dinoflagellates, 26% diatoms based on carbon biomass and not analyzed by SIMS), and not assigned + organisms >3 µm, which can either be not assigned organisms or POC between 0.7–3 µm analyzed on the GF/F filters.