Basin-scale biogeography of Prochlorococcus and SAR11 ecotype replication

• DOI: 10.1038/s41396-022-01332-6
• Publication Date: 2022-10-22T09:11:29Z
• Authors: Alyse A Larkin; George I Hagstrom; Melissa L Brock; Nathan S Garcia; Adam C Martiny
• Keywords: Ecotype; Prochlorococcus

Abstract Establishing links between microbial diversity and environmental processes requires resolving the high degree of functional variation among closely related lineages or ecotypes. Here, we implement validate an improved metagenomic approach that estimates spatial biogeography regulation ecotype-specific replication patterns (RObs) across ocean regions. A total 719 metagenomes were analyzed from meridional Bio-GO-SHIP sections in Atlantic Indian Ocean. Accounting for sequencing bias anchoring genome structure critical identifying physiologically relevant biological signals. For example, ecotypes within dominant marine cyanobacteria Prochlorococcus exhibited distinct diel cycles RObs peaked 19:00–22:00. Additionally, both highly abundant heterotroph Pelagibacter (SAR11) demonstrated systematic biogeographies differed relative abundance. Finally, was significantly regulated by nutrient stress temperature, explained differences genomic potential transport, energy production, cell wall structure, replication. Our results suggest our new to estimating is reflective gross population growth. Moreover, this work reveals interaction adaptation change drives variability basins ecotype-specific, adding activity-based dimension understanding niche space.