HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Chlordecone-contaminated epilithic biofilms show increased adsorption capacities

Abstract : The rivers of Guadeloupe and Martinique (French West Indies) show high levels of chlordecone (CLD) contamination. This persistent molecule has a dramatic impact on both aquatic ecosystems and human health. In these rivers, epilithic biofilms are the main endogenous primary producers and represent a central food source for fish and crustaceans. Recently, their viscoelastic properties have been shown to be effective in bio-assessing pollution in tropical environments. As these properties are closely related to the biochemical composition of the biofilms, biochemical (fatty acids, pigments, extracellular polymeric substances (EPS) monosaccharides) and molecular markers (T-RFLP fingerprints of bacteria, archaea and eukaryotes) were investigated. Strong links between CLD pollution and both biofilm biochemistry and microbial community composition were found. In particular, high levels of CLD were linked with modified exo-polysaccharides corresponding to carbohydrates with enhanced adsorption and adhesion properties. The observed change probably resulted from a preferential interaction between CLD and sugars and/or a differential microbial secretion of EPS in response to the pollutant. These changes were expected to impact viscoelastic properties of epilithic biofilms highlighting the effect of CLD pollution on biofilm EPS matrix. They also suggested that microorganisms implement a CLD scavenging strategy, providing new insights on the role of EPS in the adaptation of microorganisms to CLD-polluted environments.
Complete list of metadata

https://hal-mnhn.archives-ouvertes.fr/mnhn-03588576
Contributor : Cédric Hubas Connect in order to contact the contributor
Submitted on : Friday, February 25, 2022 - 8:05:43 AM
Last modification on : Thursday, May 19, 2022 - 3:45:40 PM

File

Revised-CLD-2022-without-track...
Files produced by the author(s)

Identifiers

Citation

Cédric Hubas, Dominique Monti, Jean-Michel Mortillaro, Sylvie Augagneur, Anne Carbon, et al.. Chlordecone-contaminated epilithic biofilms show increased adsorption capacities. Science of the Total Environment, Elsevier, 2022, 825, pp.153942. ⟨10.1016/j.scitotenv.2022.153942⟩. ⟨mnhn-03588576⟩

Share

Metrics

Record views

165

Files downloads

51