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. 2022 Jul 1;2:54. doi: 10.1038/s43705-022-00132-5

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© The Author(s) 2022

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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Fig. 1 — A Total phytoplankton biomass estimates (chlorophyll a concentrations, green boxes) and photosynthetic efficiency (F_v/F_m, ratio of variable fluorescence to maximal fluorescence, black circles) as a function of relative Fe availability. Results are shown as the means ± error of technical duplicates, averaged between duplicate bottles. B Principal component analysis (PCA) displaying PC1 against PC2 of total community gene transcript abundance patterns, color coded by treatment (blue = DFB-added, orange = Fe added). The black circle is the control bottle and gray circle is the T = 0 h in situ sample. Each bottle duplicate is plotted, with the exception of the control.