Reference : Genomic and metabolic adaptations of biofilms to ecological windows of opportunities ...
E-prints/Working papers : Already available on another site
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/10993/48976
Genomic and metabolic adaptations of biofilms to ecological windows of opportunities in glacier-fed streams 2021.10.07.463499
English
Busi, Susheel Bhanu mailto [University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Systems Ecology]
Bourquin, Massimo [> >]
Fodelianakis, Stilianos [> >]
Michoud, Grégoire [> >]
Kohler, Tyler J. [> >]
Peter, Hannes [> >]
Pramateftaki, Paraskevi [> >]
Styllas, Michail [> >]
Tolosano, Matteo [> >]
De Staercke, Vincent [> >]
Schön, Martina [> >]
de Nies, Laura mailto [University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Systems Ecology]
Marasco, Ramona [> >]
Daffonchio, Daniele [> >]
Ezzat, Le Ila [> >]
Wilmes, Paul mailto [University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Systems Ecology]
Battin, Tom J. [> >]
2021
Cold Spring Harbor Laboratory
No
[en] Microorganisms dominate life in cryospheric ecosystems. In glacier-fed streams (GFSs), ecological windows of opportunities allow complex microbial biofilms to develop and transiently form the basis of the food web, thereby controlling key ecosystem processes. Here, using high-resolution metagenomics, we unravel strategies that allow biofilms to seize this opportunity in an ecosystem otherwise characterized by harsh environmental conditions. We found a diverse microbiome spanning the entire tree of life and including a rich virome. Various and co-existing energy acquisition pathways point to diverse niches and the simultaneous exploitation of available resources, likely fostering the establishment of complex biofilms in GFSs during windows of opportunity. The wide occurrence of rhodopsins across metagenome-assembled genomes (MAGs), besides chlorophyll, highlights the role of solar energy capture in these biofilms. Concomitantly, internal carbon and nutrient cycling between photoautotrophs and heterotrophs may help overcome constraints imposed by the high oligotrophy in GFSs. MAGs also revealed mechanisms potentially protecting bacteria against low temperatures and high UV-radiation. The selective pressure of the GFS environment is further highlighted by the phylogenomic analysis, differentiating the representatives of the genus Polaromonas, an important component of the GFS microbiome, from those found in other ecosystems. Our findings reveal key genomic underpinnings of adaptive traits that contribute to the success of complex biofilms to exploit environmental opportunities in GFSs, now rapidly changing owing to global warming.Competing Interest StatementThe authors have declared no competing interest.
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http://hdl.handle.net/10993/48976
10.1101/2021.10.07.463499
https://www.biorxiv.org/content/early/2021/10/07/2021.10.07.463499
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
https://www.biorxiv.org/content/10.1101/2021.10.07.463499v1

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