Functional biogeography of marine microbial heterotrophs

• 成果类型: Article
• 署名作者: Zakem, Emily J.; McNichol, Jesse; Weissman, J. L.; Raut, Yubin; Xu, Liang; Halewood, Elisa R.; Carlson, Craig A.; Dutkiewicz, Stephanie; Fuhrman, Jed A.; Levine, Naomi M.
• 署名单位: Carnegie Institution for Science; Saint Francis Xavier University - Canada; University of Southern California; State University of New York (SUNY) System; Stony Brook University; State University of New York (SUNY) System; Stony Brook University; City University of New York (CUNY) System; Massachusetts Institute of Technology (MIT); University of California System; University of California Santa Barbara; Massachusetts Institute of Technology (MIT)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11947
• DOI: 10.1126/science.ado5323
• 发表日期: 2025-05-22
• 关键词: dissolved organic-carbon; sar11 bacteria; ocean; diversity; matter; CLASSIFICATION; communities; taxonomy; common; MODEL

摘要

Heterotrophic bacteria and archaea (heteroprokaryotes) drive global carbon cycling, but how to quantitatively organize their functional complexity remains unclear. We generated a global-scale understanding of marine heteroprokaryotic functional biogeography by synthesizing genetic sequencing data with a mechanistic marine ecosystem model. We incorporated heteroprokaryotic diversity into the trait-based model along two axes: substrate lability and growth strategy. Using genetic sequences along three ocean transects, we compiled 21 heteroprokaryotic guilds and estimated their degree of optimization for rapid growth (copiotrophy). Data and model consistency indicated that gradients in grazing and substrate lability predominantly set biogeographical patterns, and we identified deep-ocean slow copiotrophs whose ecological interactions control the surface accumulation of dissolved organic carbon.