Publications des scientifiques de l'IRD

Zouch H., Cabrol Léa, Chifflet Sandrine, Tedetti Marc, Karray F., Zaghden H., Sayadi S., Quéméneur Marianne. (2018). Effect of acidic industrial effluent release on microbial diversity and trace metal dynamics during resuspension of coastal sediment. Frontiers in Microbiology, 9, p. art. 3103 [ p.]. ISSN 1664-302X.

Titre du document
Effect of acidic industrial effluent release on microbial diversity and trace metal dynamics during resuspension of coastal sediment
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000453346600001
Auteurs
Zouch H., Cabrol Léa, Chifflet Sandrine, Tedetti Marc, Karray F., Zaghden H., Sayadi S., Quéméneur Marianne
Source
Frontiers in Microbiology, 2018, 9, p. art. 3103 [ p.] ISSN 1664-302X
Both industrial effluent discharge and the resuspension of contaminated marine sediments are important sources of trace metals in seawater which potentially affect marine ecosystems. The aim of this study was to evaluate the impact of the industrial wastewaters having acidic pH (2-3) and containing trace metals on microbial diversity in the coastal ecosystem of the Gulf of Gabes (Tunisia, southern Mediterranean Sea) subjected to resuspension events of marine sediments. Four trace elements (As, Cd, U, and V) were monitored during 10-day sediment resuspension experiments. The highest enrichment in the seawater dissolved phase was observed for Cd followed by U, V, and As. Cd remobilization was improved by indigenous microbial community, while U release was mainly abiotic. Acidic effluent addition impacted both trace metal distribution and microbial diversity, particularly that of the abundant phylum Bacteroidetes. Members of the order Saprospirales were enriched from sediment in natural seawater (initial pH > 8), while the family Flavobacteriaceae was favored by acidified seawater (initial pH < 8). Some Flavobacteriaceae members were identified as dominant species in both initial sediment and experiments with acidic wastewater, in which their relative abundance increased with increasing dissolved Cd levels. It could be therefore possible to consider them as bioindicators of metal pollution and/or acidification in marine ecosystems.
Plan de classement
Pollution [038] ; Biotechnologies [084]
Description Géographique
MEDITERRANEE
Localisation
Fonds IRD [F B010074786]
Identifiant IRD
fdi:010074786
Contact