Remarkably coherent population structure for a dominant Antarctic Chlorobium species.

ABSTRACT:

Background

In Antarctica, summer sunlight enables phototrophic microorganisms to drive primary production, thereby "feeding" ecosystems to enable their persistence through the long, dark winter months. In Ace Lake, a stratified marine-derived system in the Vestfold Hills of East Antarctica, a Chlorobium species of green sulphur bacteria (GSB) is the dominant phototroph, although its seasonal abundance changes more than 100-fold. Here, we analysed 413 Gb of Antarctic metagenome data including 59 Chlorobium metagenome-assembled genomes (MAGs) from Ace Lake and nearby stratified marine basins to determine how genome variation and population structure across a 7-year period impacted ecosystem function.

Results

A single species, Candidatus Chlorobium antarcticum (most similar to

SUBMITTER: Panwar P 

PROVIDER: S-EPMC8620254 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature