Stief, Peter ORCID: 0000-0002-6355-150X, Schauberger, Clemens, Lund, Marie B., Greve, Andreas, Abed, Raeid M. M., Al-Najjar, Mohammad A. A., Attard, Karl ORCID: 0000-0002-8009-5462, Bonaglia, Stefano ORCID: 0000-0003-4366-0677, Deutzmann, Jorg S., Franco-Cisterna, Belen ORCID: 0000-0002-9114-2818, Garcia-Robledo, Emilio ORCID: 0000-0002-4337-6433, Holtappels, Moritz, John, Uwe ORCID: 0000-0002-1297-4086, Maciute, Adele, Magee, Michael J. ORCID: 0009-0009-8750-815X, Pors, Rie, Santl-Temkiv, Tina ORCID: 0000-0002-3446-5813, Scherwass, Anja, Sevilgen, Duygu S., de Beer, Dirk, Glud, Ronnie N. ORCID: 0000-0002-7069-893X, Schramm, Andreas ORCID: 0000-0002-7614-9616 and Kamp, Anja ORCID: 0000-0002-5987-7611 (2022). Intracellular nitrate storage by diatoms can be an important nitrogen pool in freshwater and marine ecosystems. Commun. Earth Environ., 3 (1). LONDON: SPRINGERNATURE. ISSN 2662-4435

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Abstract

Identifying and quantifying nitrogen pools is essential for understanding the nitrogen cycle in aquatic ecosystems. The ubiquitous diatoms represent an overlooked nitrate pool as they can accumulate nitrate intracellularly and utilize it for nitrogen assimilation, dissipation of excess photosynthetic energy, and Dissimilatory Nitrate Reduction to Ammonium (DNRA). Here, we document the global co-occurrence of diatoms and intracellular nitrate in phototrophic microbial communities in freshwater (n = 69), coastal (n = 44), and open marine (n = 4) habitats. Diatom abundance and total intracellular nitrate contents in water columns, sediments, microbial mats, and epilithic biofilms were highly significantly correlated. In contrast, diatom community composition had only a marginal influence on total intracellular nitrate contents. Nitrate concentrations inside diatom cells exceeded ambient nitrate concentrations similar to 100-4000-fold. The collective intracellular nitrate pool of the diatom community accounted for <1% of total nitrate in pelagic habitats and 65-95% in benthic habitats. Accordingly, nitrate-storing diatoms are emerging as significant contributors to benthic nitrogen cycling, in particular through Dissimilatory Nitrate Reduction to Ammonium activity under anoxic conditions. The accumulation and storage of nitrate by diatoms can contribute up to 1% of total pelagic nitrate and as much as 95% of total benthic nitrate, which indicates a potentially important contribution of diatoms to benthic nitrogen cycling, according to a global analysis

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Stief, PeterUNSPECIFIEDorcid.org/0000-0002-6355-150XUNSPECIFIED
Schauberger, ClemensUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lund, Marie B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Greve, AndreasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Abed, Raeid M. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Al-Najjar, Mohammad A. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Attard, KarlUNSPECIFIEDorcid.org/0000-0002-8009-5462UNSPECIFIED
Bonaglia, StefanoUNSPECIFIEDorcid.org/0000-0003-4366-0677UNSPECIFIED
Deutzmann, Jorg S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Franco-Cisterna, BelenUNSPECIFIEDorcid.org/0000-0002-9114-2818UNSPECIFIED
Garcia-Robledo, EmilioUNSPECIFIEDorcid.org/0000-0002-4337-6433UNSPECIFIED
Holtappels, MoritzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
John, UweUNSPECIFIEDorcid.org/0000-0002-1297-4086UNSPECIFIED
Maciute, AdeleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Magee, Michael J.UNSPECIFIEDorcid.org/0009-0009-8750-815XUNSPECIFIED
Pors, RieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santl-Temkiv, TinaUNSPECIFIEDorcid.org/0000-0002-3446-5813UNSPECIFIED
Scherwass, AnjaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sevilgen, Duygu S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Beer, DirkUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Glud, Ronnie N.UNSPECIFIEDorcid.org/0000-0002-7069-893XUNSPECIFIED
Schramm, AndreasUNSPECIFIEDorcid.org/0000-0002-7614-9616UNSPECIFIED
Kamp, AnjaUNSPECIFIEDorcid.org/0000-0002-5987-7611UNSPECIFIED
URN: urn:nbn:de:hbz:38-692710
DOI: 10.1038/s43247-022-00485-8
Journal or Publication Title: Commun. Earth Environ.
Volume: 3
Number: 1
Date: 2022
Publisher: SPRINGERNATURE
Place of Publication: LONDON
ISSN: 2662-4435
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SULFUR BACTERIUM; REDUCTION; DENITRIFICATION; PHYTOPLANKTON; NITRITE; GROWTH; DARK; TEMPERATURE; PHYCOCYANIN; BIOVOLUMEMultiple languages
Environmental Sciences; Geosciences, Multidisciplinary; Meteorology & Atmospheric SciencesMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69271

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