Genomic and metabolic adaptations of biofilms to ecological windows of opportunities in glacier-fed streams
Genomic and metabolic adaptations of biofilms to ecological windows of opportunities in glacier-fed streams
Abstract 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.
Tolosano Matteo、Sch?n Martina、de Nies Laura、Marasco Ramona、Daffonchio Daniele、Ezzat Le?la、Wilmes Paul、Battin Tom J.、Busi Susheel Bhanu、Bourquin Massimo、Michoud Gr¨|goire、Kohler Tyler J.、Peter Hannes、Fodelianakis Stilianos、De Staercke Vincent、Pramateftaki Paraskevi、Styllas Michail
Stream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneSystems Ecology Group, Luxembourg Centre for Systems Biomedicine, University of LuxembourgBiological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST)Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST)Stream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneSystems Ecology Group, Luxembourg Centre for Systems Biomedicine, University of LuxembourgStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneSystems Ecology Group, Luxembourg Centre for Systems Biomedicine, University of LuxembourgStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de LausanneStream Biofilm & Ecosystem Research Lab, ENAC, Ecole Polytechnique F¨|d¨|rale de Lausanne
环境科学理论环境科学技术现状微生物学
glacier-fed streamsbiofilmsmetagenomicscross-domain interactionsadaptive traits
Tolosano Matteo,Sch?n Martina,de Nies Laura,Marasco Ramona,Daffonchio Daniele,Ezzat Le?la,Wilmes Paul,Battin Tom J.,Busi Susheel Bhanu,Bourquin Massimo,Michoud Gr¨|goire,Kohler Tyler J.,Peter Hannes,Fodelianakis Stilianos,De Staercke Vincent,Pramateftaki Paraskevi,Styllas Michail.Genomic and metabolic adaptations of biofilms to ecological windows of opportunities in glacier-fed streams[EB/OL].(2025-03-28)[2025-04-29].https://www.biorxiv.org/content/10.1101/2021.10.07.463499.点此复制
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