Metagenome-assembled genomes reveal many novel microbial lineages in the geothermal springs of the subantarctic Kerguelen Islands

Type Article
Date 2022-01
Language English
Author(s) Allioux Maxime1, Yvenou Steven1, Merkel Alexander2, Cozannet Marc1, Aube Johanne5, Romancer Marc Le3, Lavastre Véronique4, Guillaume Damien4, Alain Karine6
Affiliation(s) 1 : Univ Brest, CNRS, IFREMER, Unité Biologie et Ecologie des Ecosystèmes marins Profonds BEEP, IUEM
2 : Research Center of Biotechnology of the Russian Academy of Sciences
3 : UR 7462, Laboratoire Géoarchitecture, Territoires, Urbanisation, Biodiversité, Environnement
4 : Univ Lyon, UJM-Saint-Etienne, UCBL, ENSL, CNRS, LGL-TPE UMR5276
5 : Univ Brest, CNRS, IFREMER, Unité Biologie et Ecologie des Ecosystèmes marins Profonds BEEP, IUEM
6 : Univ Brest, CNRS, IFREMER, Unité Biologie et Ecologie des Ecosystèmes marins Profonds BEEP, IUEM
Source Under review Scientific Reports (Research Square Platform LLC), 2022-01 , P. Version 1 (15p.)
DOI 10.21203/rs.3.rs-1525368/v1
Note This is a preprint; it has not been peer reviewed by a journal
Keyword(s) Kerguelen islands, hot springs, metagenomics, microorganism, metabolism
Abstract

The Kerguelen Islands, located in the southern part of the Indian Ocean, are very isolated geographically. They have been the subject of very few microbiological investigations. In particular, their microbial diversity has never been analyzed with high-throughput sequencing methods and no sequencing studies of the genomes of the microbial communities have been performed. In this article we performed the first metagenomics analysis of microorganisms present in Kerguelen hot springs. From four different hot springs, we assembled metagenomes and recovered 42 metagenome-assembled genomes, mostly associated with new taxa. Bacterial and archaeal MAGs were studied in details and showed affiliations to new species, genera, families and orders. Metabolic predictions from MAGs suggest the presence of heterotrophs and primary producers involved in the sulfur cycle. This paper, which focuses on only four of the dozens of hot springs in the Kerguelen Islands, is a preliminary study of the microorganisms, particularly thermophiles, inhabiting the hot springs of these insulated islands. These results show that more efforts should be made to better understand these ecosystems as they represent a reservoir of unknown microbial lineages and potential new metabolic pathways.

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Allioux Maxime, Yvenou Steven, Merkel Alexander, Cozannet Marc, Aube Johanne, Romancer Marc Le, Lavastre Véronique, Guillaume Damien, Alain Karine (2022). Metagenome-assembled genomes reveal many novel microbial lineages in the geothermal springs of the subantarctic Kerguelen Islands. Under review Scientific Reports, Version 1 (15p.). Publisher's official version : https://doi.org/10.21203/rs.3.rs-1525368/v1 , Open Access version : https://archimer.ifremer.fr/doc/00767/87881/