Bacterial ecology and evolution converge on seasonal and decadal scales.

ABSTRACT: Ecology and evolution are often viewed as distinct processes, which interact on contemporary time scales in microbiomes. To observe these processes in a natural system, we collected a two-decade, 471-sample freshwater lake time series, creating the longest metagenome dataset to date. Among 2,855 species-representative genomes, diverse species and strains followed cyclical seasonal patterns, and one in five species experienced decadal shifts in strain composition. The most globally abundant freshwater bacterium had constant species-level abundance, but environmental extremes appeared to trigger a shift in strain composition and positive selection of amino acid and nucleic acid metabolism genes. These genes identify organic nitrogen compounds as potential drivers of freshwater responses to g

SUBMITTER: Rohwer RR 

PROVIDER: S-EPMC10871203 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature