Microbial responses to ocean deoxygenation: Revisiting the impacts on organic carbon cycling

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2025-06-05 DOI:10.1016/j.isci.2025.112826

Quanrui Chen , Kai Tang , Weidong Zhai , Zhuoyi Zhu , Jin-Yu Terence Yang , Zhili He , Meng Li , Shuh-Ji Kao , Jun Yang , Qiang Zheng , Christian Lønborg , Helmuth Thomas , Nianzhi Jiao

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Abstract

Ocean deoxygenation is impacting and will also in the future impact fundamental biogeochemical cycles. This review explores the ecological functions of microbes under hypoxic and anoxic conditions, emphasizing their critical roles in carbon source-sink dynamics. We examine microbial ecosystems in both open-ocean oxygen minimum zones and China’s coastal hypoxic areas, highlighting the microbial contributions to deoxygenation driven processes. We also explore how organic carbon cycling driven by microbial heterotrophic and autotrophic metabolisms change across oxygen gradients. Furthermore, this review elucidates the interconnected cycling of carbon, nitrogen, sulfur, and phosphorus, which regulate organic matter consumption and/or storage under deoxygenation, and alters the elemental composition of organic matter. Our study highlights the importance of microbial processes in regulating carbon cycle under ocean deoxygenation, emphasizing the dual role of hypoxic zones as transient sources and long-term sinks of organic carbon. Lastly, we highlight current challenges in addressing ocean deoxygenation and provide avenues for future research.

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微生物对海洋脱氧的响应：重新审视对有机碳循环的影响

海洋脱氧正在影响并将在未来影响基本的生物地球化学循环。本文综述了微生物在缺氧和缺氧条件下的生态功能，强调了它们在碳源-汇动态中的关键作用。我们研究了开放海洋最低氧区和中国沿海低氧区微生物生态系统，强调了微生物对脱氧驱动过程的贡献。我们还探讨了微生物异养和自养代谢驱动的有机碳循环如何在氧梯度上发生变化。此外，本文还阐明了碳、氮、硫和磷的相互循环，它们在脱氧条件下调节有机质的消耗和/或储存，并改变有机质的元素组成。我们的研究强调了微生物过程在海洋脱氧条件下调节碳循环中的重要性，强调了缺氧区作为有机碳的短暂来源和长期汇的双重作用。最后，我们强调了目前解决海洋脱氧的挑战，并为未来的研究提供了途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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