Tag Archive for: silicon

The silicon cycle at “la Méthode Scientifique” radio program, May 5, 2021 at 4pm


Silicon. Why should we be interested in this element? Because it is particularly abundant in the form of silica and silicate minerals on the planet Earth and on other terrestrial planets (Mercury, Venus, Mars). If on Earth living organisms are based on the carbon cycle, essential organisms of marine life (diatoms, radiolarians, a good part of sponges, …) require silicon to build their internal or external structures. Without silicon, the biological carbon pump loses much of its efficiency. What are the sources and sinks of silicon in the ocean? What is the production of biogenic silica in the ocean? How is the silicon cycle evolving in response to climate change and anthropogenic perturbations?

These are the questions that Paul Tréguer (LEMAR, IUEM-UBO) answered on France Culture, during the program “La Méthode Scientifique” on Wednesday, May 5, at 4:00 pm, a program to which Anne Alexandre (CEREGE, CNRS) was also invited.


Radiolarians and the silicon cycle: Natalia Llopis-Monferrer’s work in the spotlight!

The American Geophysical Union (AGU) has declared “Research Spotlight” the recent article by Natalia Llopis-Monferrer in “Global Biogeochemical Cycles” on the importance of radiolarians (marine planktonic organisms) in the silicon cycle of the world ocean.

This recent work re-evaluates the role of these tiny protists, which could contribute up to one-fifth of the world’s silica production by marine organisms.

Natalia Llopis-Monferer is a spanish student at LEMAR (UMR 6539). She is co-supervised by Aude Leynaert (CNRS), Fabrice Not (SBR) and Paul Tréguer (UBO).

Read the “EOS” article (Sciences News by AGU)