Articles | Volume 14, issue 24
https://doi.org/10.5194/bg-14-5789-2017
https://doi.org/10.5194/bg-14-5789-2017
Research article
 | 
22 Dec 2017
Research article |  | 22 Dec 2017

The Holocene sedimentary record of cyanobacterial glycolipids in the Baltic Sea: an evaluation of their application as tracers of past nitrogen fixation

Martina Sollai, Ellen C. Hopmans, Nicole J. Bale, Anchelique Mets, Lisa Warden, Matthias Moros, and Jaap S. Sinninghe Damsté

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Cited articles

Adams, D. G.: Heterocyst formation in cyanobacteria, Curr. Opin. Microbiol., 3, 618–624, 2000.
Andrén, E., Andrén, T., and Kunzendorf, H.: Holocene history of the Baltic Sea as a background for assessing records of human impact in the sediments of the Gotland Basin, Holocene, 10, 687–702, https://doi.org/10.1191/09596830094944, 2000.
Andrén, T., Björck, S., Andrén, E., Conley, D. J., Zillén, L., and Anjar, J.: The Development of the Baltic Sea Basin During the Last 130 ka, in: The Baltic Sea Basin, chap. 4, edited by: Harff, J., Björck, S., and Hoth, P., Springer, Berlin Heidelberg, Germany, 75–97, 2011.
Arrigo, K. R.: Marine microorganisms and global nutrient cycles, Nature, 437, 349–355, https://doi.org/10.1038/nature04158, 2005.
Bale, N. J., Hopmans, E. C., Zell, C., Lima Sobrinho, R., Kim, J. H., Sinninghe Damsté, J. S., Villareal, T. A., and Schouten, S.: Long chain glycolipids with pentose head groups as biomarkers for marine endosymbiotic heterocystous cyanobacteria, Org. Geochem., 81, 1–7, https://doi.org/10.1016/j.orggeochem.2015.01.004, 2015.
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Short summary
The Baltic Sea is characterized by recurring summer phytoplankton blooms, dominated by a few cyanobacterial species. These bacteria are able to use dinitrogen gas as the source for nitrogen and produce very specific lipids. We analyzed these lipids in a sediment core to study their presence over the past 7000 years. This reveals that cyanobacterial blooms have not only occurred in the last decades but were common at times when the Baltic was connected to the North Sea.
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