Core microbial communities of lacustrine microbialites sampled along an alkalinity gradient.
Journal
Environmental microbiology
ISSN: 1462-2920
Titre abrégé: Environ Microbiol
Pays: England
ID NLM: 100883692
Informations de publication
Date de publication:
01 2021
01 2021
Historique:
received:
31
05
2020
revised:
26
08
2020
accepted:
23
09
2020
pubmed:
29
9
2020
medline:
20
5
2021
entrez:
28
9
2020
Statut:
ppublish
Résumé
Microbialites are usually carbonate-rich sedimentary rocks formed by the interplay of phylogenetically and metabolically complex microbial communities with their physicochemical environment. Yet, the biotic and abiotic determinants of microbialite formation remain poorly constrained. Here, we analysed the structure of prokaryotic and eukaryotic communities associated with microbialites occurring in several crater lakes of the Trans-Mexican volcanic belt along an alkalinity gradient. Microbialite size and community structure correlated with lake physicochemical parameters, notably alkalinity. Although microbial community composition varied across lake microbialites, major taxa-associated functions appeared quite stable with both, oxygenic and anoxygenic photosynthesis and, to less extent, sulphate reduction, as major putative carbonatogenic processes. Despite interlake microbialite community differences, we identified a microbial core of 247 operational taxonomic units conserved across lake microbialites, suggesting a prominent ecological role in microbialite formation. This core mostly encompassed Cyanobacteria and their typical associated taxa (Bacteroidetes, Planctomycetes) and diverse anoxygenic photosynthetic bacteria, notably Chloroflexi, Alphaproteobacteria (Rhodobacteriales, Rhodospirilalles), Gammaproteobacteria (Chromatiaceae) and minor proportions of Chlorobi. The conserved core represented up to 40% (relative abundance) of the total community in lakes Alchichica and Atexcac, displaying the highest alkalinities and the most conspicuous microbialites. Core microbialite communities associated with carbonatogenesis might be relevant for inorganic carbon sequestration purposes.
Identifiants
pubmed: 32985763
doi: 10.1111/1462-2920.15252
doi:
Substances chimiques
Carbonates
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
51-68Subventions
Organisme : Agence Nationale de la Recherche
ID : ANR-18-CE02-0013-01
Organisme : FP7 Ideas: European Research Council
ID : 322669
Organisme : H2020 European Research Council
ID : 787904
Informations de copyright
© 2020 Society for Applied Microbiology and John Wiley & Sons Ltd.
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