%0 Journal Article %T The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats %+ Los Alamos National Laboratory (LANL) %+ Ecologie des systèmes marins côtiers (Ecosym) %+ Institut méditerranéen d'océanologie (MIO) %+ Environnements et Paléoenvironnements OCéaniques (EPOC) %+ Laboratoire de Génétique Cellulaire (LGC) %+ Laboratoire de Mathématiques et de leurs Applications [Pau] (LMAP) %+ Unité de Biométrie et Intelligence Artificielle (ancêtre de MIAT) (UBIA) %+ Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) %A Aubé, Johanne %A Senin, Pavel %A Pringault, Olivier %A Bonin, Patricia %A Deflandre, Bruno %A Bouchez, Olivier %A Bru, Noëlle %A Biritxinaga-Etchart, Edurne %A Klopp, Christophe, C. %A Guyoneaud, Remy %A Goñi, Marisol %Z French National Research Agency (ANR FUNHYMAT) [ANR11 BSV7 014 01] %< avec comité de lecture %@ 0025-326X %J Marine Pollution Bulletin %I Elsevier %V 111 %N 1-2 %P 115-125 %8 2016-10 %D 2016 %R 10.1016/j.marpolbul.2016.07.023 %M 27449831 %K Biogeochemical functioning %K Diversity %K Hydrocarbonoclastic bacteria %K Microbial mats %Z Environmental Sciences %Z Environmental Sciences/Biodiversity and EcologyJournal articles %X 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 %G English %L ird-02048573 %U https://ird.hal.science/ird-02048573 %~ IRD %~ SDE %~ INSU %~ EPHE %~ UNIV-TLN %~ CNRS %~ UNIV-AMU %~ UNIV-PAU %~ UNIV-MONTP1 %~ UNIV-MONTP2 %~ IFREMER %~ INRA %~ LMA-PAU %~ MIO %~ OSU-INSTITUT-PYTHEAS %~ GIP-BE %~ IPREM %~ AGROPOLIS %~ INC-CNRS %~ PSL %~ AGREENIUM %~ IPREM-CME %~ TEST-DEV %~ INRAE %~ EPHE-PSL %~ MIO-MEB %~ GENETIQUE_ANIMALE %~ GENPHYSE %~ TOULOUSE-INP %~ UT3-INP %~ UT3-TOULOUSEINP %~ TEST2-HALCNRS %~ MATHNUM %~ MIAT %~ ENVT %~ TEST-MATHNUM