在这项工作中，小组将广泛的基因组信息与水文和水团年龄相结合，以划定南太平洋的微生物分类和功能边界。原核生物丰富度随着海洋表面深度的增加而急剧增加，形成了所谓的门斜层，在门斜层以下，丰富度一直很高，在高度老化的水中略有下降。重建的基因组自组织成6个空间上不同的分类群和10个功能上不同的生物群系，这些生物群系主要由表层风驱动环流和深层密度驱动环流构成。总的来说，水的物理化学，在深度上受水年龄的调节，驱动着远洋微生物的多样性模式和功能潜力。
据悉，全球翻转环流将深海划分成不同的区域，每个区域都有不同的物理化学特征，但这些水体在多大程度上代表着不同的生态系统仍然未知。
附：英文原文
Title: Overturning circulation structures the microbial functional seascape of the South Pacific
Author: Bethany C. Kolody, Rohan Sachdeva, Hong Zheng, Zoltán Füssy, Eunice Tsang, Rolf E. Sonnerup, Sarah G. Purkey, Eric E. Allen, Jillian F. Banfield, Andrew E. Allen
Issue&Volume: 2025-07-10
Abstract: 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.
DOI: adv6903
Source: https://www.science.org/doi/10.1126/science.adv6903