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Concentrations and uptake of dissolved organic phosphorus compounds in the Baltic Sea

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Nausch, M, Achterberg, EP, Bach, LT ORCID: 0000-0003-0202-3671, Brussaard, CPD, Crawfurd, KJ, Fabian, J, Riebesell, U, Stuhr, A, Unger, J and Wannicke, N 2018 , 'Concentrations and uptake of dissolved organic phosphorus compounds in the Baltic Sea' , Frontiers in Marine Science, vol. 5 , pp. 1-18 , doi: 10.3389/fmars.2018.00386.

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Abstract

The dissolved organic phosphorus (DOP) pool in marine waters contains a variety of different compounds. Knowledge of the distribution and utilization of DOP by phyto- and bacterioplankton is limited, but critical to our understanding of the marine phosphorus cycle. In the Baltic Sea, detailed information about the composition of DOP and its turnover is lacking. This study reports the concentrations and uptake rates of DOP compounds, namely, adenosine triphosphate (dATP), deoxyribonucleic acid (dDNA), and phospholipids (dPL), in the Baltic Proper and in Finnish coastal waters in the summers of 2011 and 2012. Both areas differed in their dissolved inorganic phosphorus (DIP) concentrations (0.16 and 0.02–0.04 μM), in the C:P (123–178) and N:P (18–27) ratios, and in abundances of filamentous cyanobacteria and of autotrophic and heterotrophic picoplankton. The mean concentrations of dATP-P, dDNA-P, and dPL-P were 4.3–6.4, 0.05–0.12, and 1.9–6.8 nM, respectively, together contributing between 2.4 and 5.2% of the total DOP concentration. The concentrations of the compounds varied between and within the investigated regions and the distribution patterns of the individual components are not linked to each other. DIP was taken up at rates of 10.1–380.8 nM d-1. dATP-P and dDNA-P were consumed simultaneously with DIP at rates of 6.9–24.1 and 0.09–0.19 nM d-1, respectively, with the main proportion taken up by the size fraction

Item Type: Article
Authors/Creators:Nausch, M and Achterberg, EP and Bach, LT and Brussaard, CPD and Crawfurd, KJ and Fabian, J and Riebesell, U and Stuhr, A and Unger, J and Wannicke, N
Keywords: phosphorous cycle, Baltic Sea, dissolved organic phosphorus (DOP), DOP compounds, adenosine triphosphate, DNA, phospholipids, phosphorus uptake rates
Journal or Publication Title: Frontiers in Marine Science
Publisher: Frontiers Research Foundation
ISSN: 2296-7745
DOI / ID Number: 10.3389/fmars.2018.00386
Copyright Information:

Copyright 2018 Nausch, Achterberg, Bach, Brussaard Crawfurd, Fabian, Riebesell, Stuhr, Unger and Wannicke. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

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