Overturning circulation structures the microbial functional seascape of the South Pacific

• 成果类型: Article
• 署名作者: Kolody, Bethany C.; Sachdeva, Rohan; Zheng, Hong; Fuessy, Zoltan; Tsang, Eunice; Sonnerup, Rolf E.; Purkey, Sarah G.; Allen, Eric E.; Banfield, Jillian F.; Allen, Andrew E.
• 署名单位: University of California System; University of California San Diego; Scripps Institution of Oceanography; J. Craig Venter Institute; University of California System; University of California Berkeley; University of Washington; University of Washington Seattle; University of California System; University of California Berkeley; University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; Monash University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9513
• DOI: 10.1126/science.adv6903
• 发表日期: 2025-07-10
• 页码: 176-182
• 关键词: mediated cell-death; escherichia-coli; community composition; r package; ocean; bacteria; phytoplankton; FAMILY; water; ventilation

摘要

Global overturning circulation partitions the deep ocean into regions, each with different physicochemical characteristics, but the extent to which these water masses represent distinct ecosystems remains unknown. In this work, we integrate extensive genomic information with hydrography and water mass age to delineate microbial taxonomic and functional boundaries across the South Pacific. Prokaryotic richness steeply increases with depth in the surface ocean, which forms a so-called phylocline, below which, richness is consistently high, dipping slightly in highly aged water. Reconstructed genomes self-organize into six spatially distinct taxonomic cohorts and 10 functionally distinct biomes that are primarily structured by wind-driven circulation at the surface and density-driven circulation at depth. Overall, water physicochemistry, modulated at depth by water age, drives microbial diversity patterns and functional potential in the pelagic ocean.