The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats

Abstract : Photosynthetic microbial mats are metabolically structured systems driven by solar light. They are ubiquitous and can grow in hydrocarbon-polluted sites. Our aim is to determine the impact of chronic hydrocarbon contamination on the structure, activity, and functioning of a microbial mat. We compared it to an uncontaminated mat harboring similar geochemical characteristics. The mats were sampled in spring and fall for 2 years. Seasonal variations were observed for the reference mat: sulfur cycle-related bacteria dominated spring samples, while Cyanobacteria dominated in autumn. The contaminated mat showed minor seasonal variation; a progressive increase of Cyanobacteria was noticed, indicating a perturbation of the classical seasonal behavior. Hydrocarbon content was the main factor explaining the differences in the microbial community structure; however, hydrocarbonoclastic bacteria were among rare or transient Operational Taxonomic Units (OTUs) in the contaminated mat. We suggest that in long-term contaminated systems, hydrocarbonoclastic bacteria cannot be considered a sentinel of contamination
Type de document :
Article dans une revue
Marine Pollution Bulletin, Elsevier, 2016, 111 (1-2), pp.115-125. 〈10.1016/j.marpolbul.2016.07.023〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01439616
Contributeur : Mio Aigle <>
Soumis le : mercredi 18 janvier 2017 - 16:41:55
Dernière modification le : jeudi 19 juillet 2018 - 10:52:36

Identifiants

Citation

Johanne Aube, Pavel Senin, Olivier Pringault, Patricia Bonin, Bruno Deflandre, et al.. The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats. Marine Pollution Bulletin, Elsevier, 2016, 111 (1-2), pp.115-125. 〈10.1016/j.marpolbul.2016.07.023〉. 〈hal-01439616〉

Partager

Métriques

Consultations de la notice

203