Metagenome-assembled genomes of deep-sea sediments: changes in microbial functional potential lag behind redox transitions.

ABSTRACT: Hadal sediments are hotspots of microbial activity in the deep sea and exhibit strong biogeochemical gradients. But although these gradients are widely assumed to exert selective forces on hadal microbial communities, the actual relationship between biogeochemistry, functional traits, and microbial community structure remains poorly understood. We tested whether the biogeochemical conditions in hadal sediments select for microbes based on their genomic capacity for respiration and carbohydrate utilization via a metagenomic analysis of over 153 samples from the Atacama Trench region (max. depth = 8085 m). The obtained 1357 non-redundant microbial genomes were affiliated with about one-third of all known microbial phyla, with more than half belonging to unknown genera. This indicated that th

SUBMITTER: Schauberger C 

PROVIDER: S-EPMC10809760 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature