EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

An unsuspected biomineralization process in the green algae class Chlorodendrophyceae 

Inés Segovia Campos1, Agathe Martignier1, Montserrat Filella2, and Daniel Ariztegui1
Inés Segovia Campos et al.
  • 1University of Geneva, Department of Earth Sciences, Geneva, Switzerland (
  • 2University of Geneva, Department F.-A. Forel, Geneva, Switzerland

Chlorodendrophyceae are a class of unicellular green algae widespread in the aquatic environment (seawater, brackish water, and freshwater) that have recently been discovered to form intracellular carbonates. These mineral inclusions, called micropearls, are mainly composed of hydrated amorphous calcium carbonates (ACC) in which strontium can also accumulate at high concentrations. Under natural and culture conditions, the Sr/Ca ratio of micropearls can be 200 times higher than in their environment, suggesting that Chlorodendrophyceae species may be considered as potential candidates for new bioremediation methods regarding radioactive 90Sr water contamination. Because very little is known about this phenomenon, ongoing experiments with laboratory cultures are providing essential information about the cellular mechanisms involved in this newly discovered biomineralization process and its impact on the geochemical cycles of Ca and Sr.

How to cite: Segovia Campos, I., Martignier, A., Filella, M., and Ariztegui, D.: An unsuspected biomineralization process in the green algae class Chlorodendrophyceae , EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-15510,, 2021.