Keystone microbial taxa organize micropollutant-related modules shaping the microbial community structure in estuarine sediments

Type Article
Date 2023-04
Language English
Author(s) Veloso Sandrine1, Amouroux David1, Lanceleur Laurent2, Cagnon ChristineORCID1, Monperrus Mathilde2, Deborde JonathanORCID2, 3, Laureau Cristiana Cravo1, Duran RobertORCID1
Affiliation(s) 1 : Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l’Environnement et les matériaux, Pau, France
2 : Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS IPREM, Institut des Sciences Analytiques et de Physico-chimie pour l’Environnement et les matériaux, Anglet, France
3 : Ifremer, LITTORAL, Laboratoire Environnement Ressources des Pertuis Charentais, F-17390 La Tremblade, France
Source Journal Of Hazardous Materials (0304-3894) (Elsevier BV), 2023-04 , Vol. 448 , P. 130858 (13p.)
DOI 10.1016/j.jhazmat.2023.130858
WOS© Times Cited 5
Keyword(s) Multi-contamination, Sequencing, Co-occurrence network, Microbial ecology, Antibiotics
Abstract

The fluctuation of environmental conditions drives the structure of microbial communities in estuaries, highly dynamic ecosystems. Microorganisms inhabiting estuarine sediments play a key role in ecosystem functioning. They are well adapted to the changing conditions, also threatened by the presence of pollutants. In order to determine the environmental characteristics driving the organization of the microbial assemblages, we conducted a seasonal survey along the Adour Estuary (Bay of Biscay, France) using 16S rRNA gene Illumina sequencing. Microbial diversity data were combined with a set of chemical analyses targeting metals and pharmaceuticals. Microbial communities were largely dominated by Proteobacteria (41 %) and Bacteroidota (32 %), showing a strong organization according to season, with an important shift in winter. The composition of microbial communities showed spatial distribution according to three main areas (upstream, middle, and downstream estuary) revealing the influence of the Adour River. Further analyses indicated that the microbial community was influenced by biogeochemical parameters (Corg/Norg and 13C) and micropollutants, including metals (As, Cu, Mn, Sn, Ti, and Zn) and pharmaceuticals (norfloxacin, oxolinic acid and trimethoprim). Network analysis revealed specific modules, organized around keystone taxa, linked to a pollutant type, providing information of paramount importance to understand the microbial ecology in estuarine ecosystems.

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Veloso Sandrine, Amouroux David, Lanceleur Laurent, Cagnon Christine, Monperrus Mathilde, Deborde Jonathan, Laureau Cristiana Cravo, Duran Robert (2023). Keystone microbial taxa organize micropollutant-related modules shaping the microbial community structure in estuarine sediments. Journal Of Hazardous Materials, 448, 130858 (13p.). Publisher's official version : https://doi.org/10.1016/j.jhazmat.2023.130858 , Open Access version : https://archimer.ifremer.fr/doc/00818/92995/