CE34 - Contaminants, écosystèmes et santé

Multi-scale mechanistic Analysis of Radionuclide INteractions with marine algaE – MARINE

Submission summary

MARINE is a 42-month project that aims at exploring chemical interactions between radionuclides released in seawater and marine organisms, from a multiscale mechanistic perspective.
Seawater is one of the top priority environmental compartment regarding chemical pollutants contamination, including radionuclides, as it often represents the final and largest receptacle for contaminated waters. As a result, marine organisms are exposed to radionuclides, which may affect their biological processes, with significant consequences for the environment and, eventually, human health.
While state-of-the art studies aim at providing inventories of radionuclides in environmental compartments, the complexity of marine environment is such that a comprehensive mechanistic approach at cellular and molecular level is necessary to describe radionuclide reactivity and transfer processes, but still missing. MARINE will fill in this gap by by identifying the biochemical mechanisms associated to radionuclide accumulation in marine organisms.
Among marine organisms, MARINE focuses on radionuclide uptake by macro-algae, that play a key role in marine ecosystems, and on radionuclide transfer from algae to algae-eating species (sea urchin).
MARINE will achieve its goal by using a mechanistic approach at cellular and molecular levels, at the edge between radio- and bio-chemistry, in order to (1) quantify radionuclides (uranium, americium) fluxes from seawater to model algae A. nodosum, (2) define radionuclides location in algal cells, (3) characterize radionuclides interactions with algal target biomolecules and (4) outline radionuclides trophic transfers from algae to a model algal-eater (sea urchin P. lividus). Through these interconnected steps, MARINE will provide a new framework for future insight and prediction of the ecotoxicological risk linked to radionuclides uptake by marine organisms in case of nuclear contaminations.

Project coordination

Maria Rosa BECCIA (UNIVERSITE COTE D'AZUR - Institut de Chimie de Nice)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

UNIVERSITE COTE D'AZUR - ICN UNIVERSITE COTE D'AZUR - Institut de Chimie de Nice

Help of the ANR 347,558 euros
Beginning and duration of the scientific project: November 2021 - 42 Months

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