Articles | Volume 20, issue 15
https://doi.org/10.5194/bg-20-3165-2023
https://doi.org/10.5194/bg-20-3165-2023
Research article
 | 
03 Aug 2023
Research article |  | 03 Aug 2023

Properties of exopolymeric substances (EPSs) produced during cyanobacterial growth: potential role in whiting events

Marlisa Martinho de Brito, Irina Bundeleva, Frédéric Marin, Emmanuelle Vennin, Annick Wilmotte, Laurent Plasseraud, and Pieter T. Visscher

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Short summary
Cyanobacterial blooms are associated with whiting events – natural occurrences of fine-grained carbonate precipitation in the water column. The role of organic matter (OM) produced by cyanobacteria in these events has been overlooked in previous research. Our laboratory experiments showed that OM affects the size and quantity of CaCO3 minerals. We propose a model of OM-associated CaCO3 precipitation during picoplankton blooms, which may have been neglected in modern and ancient events.
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