Articles | Volume 18, issue 2
https://doi.org/10.5194/os-18-401-2022
https://doi.org/10.5194/os-18-401-2022
Research article
 | 
25 Mar 2022
Research article |  | 25 Mar 2022

Salinity as a key control on the diazotrophic community composition in the southern Baltic Sea

Christian Furbo Reeder, Ina Stoltenberg, Jamileh Javidpour, and Carolin Regina Löscher

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Cited articles

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Short summary
The Baltic Sea is predicted to freshen in the future. To explore the effect of decreasing salinity on N2 fixers, we followed the natural salinity gradient in the Baltic Sea from the Kiel Fjord to the Gotland Basin and identified an N2 fixer community dominated by Nodularia and UCYN-A. A salinity threshold was identified at a salinity of 10, with Nodularia dominating at low and UCYN-A dominating at higher salinity, suggesting a future expansion of Nodularia N2 fixers and a retraction of UCYN-A.
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