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Provedor de dados:  ArchiMer
País:  France
Título:  Response of Core Microbial Consortia to Chronic Hydrocarbon Contaminations in Coastal Sediment Habitats
Autores:  Jeanbille, Mathilde
Gury, Jerome
Duran, Robert
Tronczynski, Jacek
Agogue, Helene
Ben Said, Olfa
Ghiglione, Jean-francois
Auguet, Jean-christophe
Data:  2016-10
Ano:  2016
Palavras-chave:  Co-occurrence network
Core community
Microbial consortia
Chronic contamination
Coastal sediment
Resumo:  Traditionally, microbial surveys investigating the effect of chronic anthropogenic pressure such as polyaromatic hydrocarbons (PAHs) contaminations consider just the alpha and beta diversity and ignore the interactions among the different taxa forming the microbial community. Here, we investigated the ecological relationships between the three domains of life (i.e., Bacteria, Archaea, and Eukarya) using 454 pyrosequencing on the 16S rRNA and 18S rRNA genes from chronically impacted and pristine sediments, along the coasts of the Mediterranean Sea (Gulf of Lion, Vermillion coast, Corsica, Bizerte lagoon and Lebanon) and the French Atlantic Ocean (Bay of Biscay and English Channel). Our approach provided a robust ecological framework for the partition of the taxa abundance distribution into 859 core Operational taxonomic units (OTUs) and 6629 satellite OTUs. OTUs forming the core microbial community showed the highest sensitivity to changes in environmental and contaminant variations, with salinity, latitude, temperature, particle size distribution, total organic carbon (TOC) and PAH concentrations as main drivers of community assembly. The core communities were dominated by Gammaproteobacteria and Deltaproteobacteria for Bacteria, by Thaumarchaeota, Bathyarchaeota and Thermoplasmata for Archaea and Metazoa and Dinoflagellata for Eukarya. In order to find associations among microorganisms, we generated a co-occurrence network in which PAHs were found to impact significantly the potential predator – prey relationship in one microbial consortium composed of ciliates and Actinobacteria. Comparison of network topological properties between contaminated and non-contaminated samples showed substantial differences in the network structure and indicated a higher vulnerability to environmental perturbations in the contaminated sediments.
Tipo:  Text
Idioma:  Inglês

Editor:  Frontiers Media Sa
Formato:  application/pdf
Fonte:  Frontiers In Microbiology (1664-302X) (Frontiers Media Sa), 2016-10 , Vol. 7 , N. 1637 , P. 1-13
Direitos:  2016 Jeanbille, Gury, Duran, Tronczynski, Agogué, Ben Saïd, Ghiglione and Auguet. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which ...


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