Enhanced carbon sequestration in marginal seas through bacterial transformation

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-04-04 DOI:10.1016/j.watres.2025.123595

Jinqiang Guo, Bu Zhou, Eric P. Achterberg, Yuan Shen, Jinming Song, Liqin Duan, Xuegang Li, Huamao Yuan

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引用次数: 0

Abstract

Labile organic carbon is a highly dynamic component of the marine carbon pool, traditionally thought to be respired within hours to days into carbon dioxide (CO₂) by bacteria, although there is a paucity of direct observational evidence. Here, we report that a significant portion of labile particulate organic carbon (POC) in marginal seas is converted into bacterial material. By exploiting D/L-amino acids, we trace the origins of labile POC and its transformation into bacterial POC in the marginal seas off Eastern China. Our results indicate that labile POC primarily originates from autochthonous primary production, with bacterial POC fractions closely paralleling those of labile POC. It appears that rapid bacterial POC transformation is driven by enhanced bacterial growth efficiency from abundant nutrients in marginal seas. We estimate that around 0.08 ± 0.03 Pg of bacterial organic carbon is buried annually in global marginal seas, accounting for ∼40% of total organic carbon burial, thus contributing to long-term carbon sequestration. These findings highlight the critical role of bacterial transformation in carbon sequestration within marginal seas and provide a potential mechanism for the observed increase in CO₂ uptake in coastal regions.

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.