Phylogenetic and functional diverse ANME-1 thrive in Arctic hydrothermal vents

The methane-rich areas, the Loki's Castle vent field and the Jan Mayen vent field at the Arctic Mid Ocean Ridge (AMOR), host abundant niches for anaerobic methane-oxidizers, which are predominantly filled by members of the ANME-1. In this study, we used a metagenomic-based approach that reveale...

Full description

Bibliographic Details
Published in:FEMS Microbiology Ecology
Main Authors: Vulcano, F., Hahn, C., Roerdink, D., Dahle, H., Reeves, E., Wegener, G., Steen, I., Stokke, R.
Format: Article in Journal/Newspaper
Language:English
Published: 2022
Subjects:
Arctic
Jan Mayen
Online Access:http://hdl.handle.net/21.11116/0000-000C-76B0-8
http://hdl.handle.net/21.11116/0000-000C-76B2-6
Description
Summary:The methane-rich areas, the Loki's Castle vent field and the Jan Mayen vent field at the Arctic Mid Ocean Ridge (AMOR), host abundant niches for anaerobic methane-oxidizers, which are predominantly filled by members of the ANME-1. In this study, we used a metagenomic-based approach that revealed the presence of phylogenetic and functional different ANME-1 subgroups at AMOR, with heterogeneous distribution. Based on a common analysis of ANME-1 genomes from AMOR and other geographic locations, we observed that AMOR subgroups clustered with a vent-specific ANME-1 group that occurs solely at vents, and with a generalist ANME-1 group, with a mixed environmental origin. Generalist ANME-1 are enriched in genes coding for stress response and defense strategies, suggesting functional diversity among AMOR subgroups. ANME-1 encode a conserved energy metabolism, indicating strong adaptation to sulfate-methane-rich sediments in marine systems, which does not however prevent global dispersion. A deep branching family named Ca. Veteromethanophagaceae was identified. The basal position of vent-related ANME-1 in phylogenomic trees suggests that ANME-1 originated at hydrothermal vents. The heterogeneous and variable physicochemical conditions present in diffuse venting areas of hydrothermal fields could have favored the diversification of ANME-1 into lineages that can tolerate geochemical and environmental variations. Phylogenomics and functional analysis of ANME-1 anaerobic methane oxidizers from hydrothermal systems at the Arctic Mid Ocean Ridge.

Similar Items