1
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Liu S, Hou C, Dong C, Zhao D, Chen Q, Terence Yang JY, Tang K. Integrated multi-omics analyses reveal microbial community resilience to fluctuating low oxygen in the East China sea. ENVIRONMENTAL RESEARCH 2024; 261:119764. [PMID: 39122162 DOI: 10.1016/j.envres.2024.119764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/31/2024] [Accepted: 08/07/2024] [Indexed: 08/12/2024]
Abstract
Climate change and eutrophication are accelerating ocean deoxygenation, leading to a global decline in oxygen levels. The East China Sea, frequently experiencing deoxygenation events, harbors diverse microbial communities. However, the response of these communities to the changing deoxygenation dynamics remains poorly understood. Here, we explored the composition and function of microbial communities inhabiting seawaters of the Changjiang Estuary and offshore areas. Our findings suggested that neutral processes significantly influenced the assembly of these communities. The overall bacterial composition demonstrated remarkable high stability across the oxygen gradient. Salinity exhibited a significantly stronger correlation with bacterial community structure than dissolved oxygen. Both metagenomics and metaproteomics revealed that all of the samples exhibited similar functional community structures. Heterotrophic metabolism dominated these sites, as evidenced by a diverse array of transporters and metabolic enzymes for organic matter uptake and utilization, which constituted a significant portion of the expressed proteins. O2 was the primary electron acceptor in bacteria even under hypoxic conditions, evidenced by expression of low- and high-affinity cytochrome oxidases. Proteins associated with anaerobic processes, such as dissimilatory sulfite reductases, were virtually undetectable. Untargeted liquid chromatography with tandem mass spectrometry analysis of seawater samples revealed a diverse range of dissolved organic matter (DOM) components in amino acids, lipids, organic acids, peptides, and carbohydrates, potentially fueling dominant taxa growth. Despite fluctuations in the abundance of specific genera, the remarkable similarity in community structure, function, and DOM suggests that this ecosystem possesses robust adaptive mechanisms that buffer against abrupt changes, even below the well-defined hypoxic threshold in marine ecosystem.
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Affiliation(s)
- Shujing Liu
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China
| | - Congcong Hou
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China
| | - Changjie Dong
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China
| | - Duo Zhao
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China
| | - Quanrui Chen
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China
| | - Jin-Yu Terence Yang
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China
| | - Kai Tang
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China.
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2
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Chen Y, Song K, Li Z, Su Y, Yu L, Chen B, Huang Q, Da L, Han Z, Zhou Y, Zhu X, Xu J, Dong R. Antifouling Asymmetric Block Copolymer Nanofilms via Freestanding Interfacial Polymerization for Efficient and Sustainable Water Purification. Angew Chem Int Ed Engl 2024; 63:e202408345. [PMID: 38888253 DOI: 10.1002/anie.202408345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/16/2024] [Accepted: 06/17/2024] [Indexed: 06/20/2024]
Abstract
Membrane materials that resist nonspecific or specific adsorption are urgently required in widespread practical applications, such as water purification, food processing, and life sciences. In water purification, inevitable membrane fouling not only limits membrane separation performance, leading to a decline in both permeance and selectivity, but also remarkably increases operation requirements, and augments extra maintenance costs and higher energy consumption. In this work, we report a freestanding interfacial polymerization (IP) fabrication strategy for in situ creation of asymmetric block copolymer (BCP) nanofilms with antifouling properties, greatly outperforming the conventional surface post-modification approaches. The resultant free-standing asymmetric BCP nanofilms with highly-dense, highly-hydrophilic polyethylene glycol (PEG) brushes on one side, can be readily formed via a typical IP process of a well-defined double-hydrophilic BCP composed of a highly-efficient antifouling PEG block and a membrane-forming multiamine block. The asymmetric BCP nanofilms have been applied for efficient and sustainable natural water purification, demonstrating extraordinary antifouling capabilities accompanied with superior separation performance far beyond commercial polyamide nanofiltration membranes. The antifouling behaviors of asymmetric BCP nanofilms derived from the combined effect of the hydration layer, electrostatic repulsion and steric hindrance were further elucidated by water flux and fouling resistance in combination with all-atom molecular dynamics (MD) simulation. This work opens up a new avenue for the large-scale and low-cost creation of broad-spectrum, asymmetric membrane materials with diverse functional "defect-free" surfaces in real-world applications.
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Affiliation(s)
- Yu Chen
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
- Key Laboratory of Marine Chemistry Theory and Technology (Ministry of Education) College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
| | - Kaiyuan Song
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Ziying Li
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yue Su
- School of Chemistry and Chemical Engineering Frontiers Science Centre for Transformative Molecules, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Li Yu
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Baiyang Chen
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Qijing Huang
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Lintai Da
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zeguang Han
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering Frontiers Science Centre for Transformative Molecules, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering Frontiers Science Centre for Transformative Molecules, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Jia Xu
- Key Laboratory of Marine Chemistry Theory and Technology (Ministry of Education) College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
| | - Ruijiao Dong
- Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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3
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Jiao N, Luo T, Chen Q, Zhao Z, Xiao X, Liu J, Jian Z, Xie S, Thomas H, Herndl GJ, Benner R, Gonsior M, Chen F, Cai WJ, Robinson C. The microbial carbon pump and climate change. Nat Rev Microbiol 2024; 22:408-419. [PMID: 38491185 DOI: 10.1038/s41579-024-01018-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2024] [Indexed: 03/18/2024]
Abstract
The ocean has been a regulator of climate change throughout the history of Earth. One key mechanism is the mediation of the carbon reservoir by refractory dissolved organic carbon (RDOC), which can either be stored in the water column for centuries or released back into the atmosphere as CO2 depending on the conditions. The RDOC is produced through a myriad of microbial metabolic and ecological processes known as the microbial carbon pump (MCP). Here, we review recent research advances in processes related to the MCP, including the distribution patterns and molecular composition of RDOC, links between the complexity of RDOC compounds and microbial diversity, MCP-driven carbon cycles across time and space, and responses of the MCP to a changing climate. We identify knowledge gaps and future research directions in the role of the MCP, particularly as a key component in integrated approaches combining the mechanisms of the biological and abiotic carbon pumps for ocean negative carbon emissions.
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Affiliation(s)
- Nianzhi Jiao
- Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China.
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China.
| | - Tingwei Luo
- Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
| | - Quanrui Chen
- Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
| | - Zhao Zhao
- Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
| | - Xilin Xiao
- Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
| | - Jihua Liu
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
- Institute of Marine Science and Technology, Shandong University, Qingdao, China
| | - Zhimin Jian
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
| | - Shucheng Xie
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - Helmuth Thomas
- Institute of Carbon Cycles, Helmholtz-Zentrum Hereon, Geesthacht, Germany
- Institut für Chemie und Biologie des Meeres (ICBM), Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany
| | - Gerhard J Herndl
- Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
| | - Ronald Benner
- Department of Biological Sciences, School of the Earth, Ocean and Environment, University of South Carolina, Columbia, SC, USA
| | - Micheal Gonsior
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
- Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, Solomons, MD, USA
| | - Feng Chen
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, Baltimore, MD, USA
| | - Wei-Jun Cai
- School of Marine Science and Policy, University of Delaware, Newark, DE, USA
| | - Carol Robinson
- UN Global ONCE joint focal points at Shandong University, University of East Anglia, University of Maryland Center for Environmental Science, and Xiamen University, Xiamen, China.
- Centre for Ocean and Atmospheric Sciences (COAS), School of Environmental Sciences, University of East Anglia, Norwich, UK.
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4
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Yan Z, Lv J, Yi Y, Ma X, Zhang G, Wang S, Zeng X, Jia Y. Molecular composition and characteristics of Sediment-adsorbed Dissolved Organic Matter (SDOM) along the coast of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 928:172134. [PMID: 38583612 DOI: 10.1016/j.scitotenv.2024.172134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/14/2024] [Accepted: 03/29/2024] [Indexed: 04/09/2024]
Abstract
Sediment-adsorbed Dissolved Organic Matter (SDOM) in coast plays a crucial role in the terrestrial and marine carbon cycle processes of the global environment. However, understanding the transport dynamics of SDOM along the coast of China, particularly its interactions with sediments, remains elusive. In this study, we analyzed the δ13C and δ15N stable isotopic compositions, as well as the molecular characteristics of SDOM collected from coastal areas spanning the Bohai Sea (BS), Yellow Sea (YS), East China Sea (ECS), and South China Sea (SCS), by using isotope ratio mass spectrometry and Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR-MS). We identified the predominant sources of carbon and nitrogen in coastal sediments, revealing terrigenous origins for most C and N, while anthropogenic sources dominated in the SCS. Spatial variations in SDOM chemodiversity were observed, with diverse molecular components influenced by distinct environmental factors and sediment sources. Notably, lignins and saturated compounds (such as proteins/amino sugars) were the predominant molecular compounds detected in coastal SDOM. Through Mantel tests and Spearman's correlation analysis, we elucidated the significant influence of spatial environmental factors (temperature, DO, salinity, and depth) and sediment sources on SDOM molecular chemodiversity. These findings contribute to a more comprehensive understanding of the carbon cycle dynamics along the Chinese coast.
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Affiliation(s)
- Zelong Yan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jitao Lv
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanbi Yi
- Department of Ocean Science and the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, Hong Kong SAR 00852, China
| | - Xu Ma
- College of Environment and Resources, Dalian Minzu University, Dalian, Liaoning 116600, China
| | - Guoqing Zhang
- Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang 453007, China
| | - Shaofeng Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Xiangfeng Zeng
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
| | - Yongfeng Jia
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
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5
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Hu S, Song G, Gao J, Wang Y, Yang Q, Qiu R, Li S, Zhao Z. Characteristics of DOM and bacterial community in rural black and odorous water bodies under different dimensions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172005. [PMID: 38554969 DOI: 10.1016/j.scitotenv.2024.172005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/23/2024] [Accepted: 03/23/2024] [Indexed: 04/02/2024]
Abstract
Analysis of dissolved organic matter (DOM) composition and microbial characteristics is crucial for tracing the sources of rural black and odorous water bodies (BOWB). The aim of this study was to explore the DOM and microbial diversity and identify the primary environmental factors in BOWB from various pollution sources during different periods using EEMs-PARAFAC and Illumina sequencing. It was found that the physicochemical properties vary widely across different pollution types of BOWB, with higher overall content during the high-water period compared to the normal-water period. The types of dissolved organic matter in BOWB are Tyrosine proteins, Fulvic acid, Dissolved microbial metabolites, and Humic acid. During the normal-water period, DOM originates primarily from terrestrial sources in various water bodies. However, DOM affected by livestock and poultry waste and industrial effluents is influenced by both internal and external sources during periods of high water levels. In industrial waste-type BOWB, the biological sources of water are weak. Proteobacteria, Actinobacteria, Chloroflexi, Firmicutes were the dominant bacterial phyla. According to the redundancy analysis, pH (p = 0.047), Total nitrogen (TN) (p = 0.045), Organic carbon (OC) (p = 0.044), and Nickel (Ni) (p = 0.047) are the primary environmental factors influencing the composition of bacterial communities.
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Affiliation(s)
- Siyu Hu
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China; Shaanxi University of Technology, Hanzhong 723001,China; Innovation Institute of Carbon Peaking and Carbon Neutrality, TCARE & Jiashan, Jiaxing 314100, China
| | - Guangqing Song
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China; Innovation Institute of Carbon Peaking and Carbon Neutrality, TCARE & Jiashan, Jiaxing 314100, China
| | - Jie Gao
- Shaanxi University of Technology, Hanzhong 723001,China
| | - Yuanyuan Wang
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China; Innovation Institute of Carbon Peaking and Carbon Neutrality, TCARE & Jiashan, Jiaxing 314100, China
| | - Qinyu Yang
- Shaanxi University of Technology, Hanzhong 723001,China
| | - Ruoqi Qiu
- Shaanxi University of Technology, Hanzhong 723001,China
| | - Song Li
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China; Innovation Institute of Carbon Peaking and Carbon Neutrality, TCARE & Jiashan, Jiaxing 314100, China.
| | - Zuoping Zhao
- Shaanxi University of Technology, Hanzhong 723001,China.
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6
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Dong C, Chen Q, Chen J, Dong L, Chen Y, Jiao N, Tang K. Investigating organic sulfur in estuarine and offshore environments: A combined field and cultivation approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171599. [PMID: 38490410 DOI: 10.1016/j.scitotenv.2024.171599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/06/2024] [Accepted: 03/07/2024] [Indexed: 03/17/2024]
Abstract
Estuarine-offshore sediments accumulate substantial particulate organic matter, containing organic sulfur as a key component. However, the distribution and sources of organic sulfur in such environments remain poorly understood. This study investigated organic sulfur in the Yangtze River Estuary and adjacent East China Sea. Dissolved organic sulfur varied from 0.65 to 1.99 μmol/L (molar S:C 0.006-0.018), while particulate organic sulfur ranged from 0.42 to 2.69 μmol/L (molar S:C 0.007-0.082). Sedimentary organic sulfur exhibited a similar molar S:C ratio (0.014-0.071) to particulate organic sulfur in bottom water, implying that particulate matter deposition is a potential source. Furthermore, sediments exposed to frequent hypoxia harbored significantly higher organic sulfur and S:C values compared to non-hypoxic areas. Laboratory incubation experiments revealed the underlying mechanism: sustained activity of sulfate-reducing bacteria in hypoxic sediments led to a substantial increase in sedimentary organic sulfur (from 15 to 53 μmol/g) within 600 days. This microbially driven sulfurization rendered over 90 % of the organic sulfur resistant to acid hydrolysis. Therefore, this study demonstrates that, alongside particle deposition, microbial sulfurization significantly contributes to organic sulfur enrichment and likely promotes organic matter preservation in estuarine-offshore sediments, particularly under hypoxic conditions. This finding advances our understanding of organic sulfur sources in these vital ecosystems.
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Affiliation(s)
- Changjie Dong
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Quanrui Chen
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Junhui Chen
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Liang Dong
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yaojin Chen
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Nianzhi Jiao
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China.
| | - Kai Tang
- State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China.
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7
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Zhou Z, Waska H, Henkel S, Dittmar T, Kasten S, Holtappels M. Iron Promotes the Retention of Terrigenous Dissolved Organic Matter in Subtidal Permeable Sediments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:6204-6214. [PMID: 38557085 PMCID: PMC11008242 DOI: 10.1021/acs.est.3c09531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 03/12/2024] [Accepted: 03/13/2024] [Indexed: 04/04/2024]
Abstract
Marine permeable sediments are important sites for organic matter turnover in the coastal ocean. However, little is known about their role in trapping dissolved organic matter (DOM). Here, we examined DOM abundance and molecular compositions (9804 formulas identified) in subtidal permeable sediments along a near- to offshore gradient in the German North Sea. With the salinity increasing from 30.1 to 34.6 PSU, the DOM composition in bottom water shifts from relatively higher abundances of aromatic compounds to more highly unsaturated compounds. In the bulk sediment, DOM leached by ultrapure water (UPW) from the solid phase is 54 ± 20 times more abundant than DOM in porewater, with higher H/C ratios and a more terrigenous signature. With 0.5 M HCl, the amount of leached DOM (enriched in aromatic and oxygen-rich compounds) is doubled compared to UPW, mainly due to the dissolution of poorly crystalline Fe phases (e.g., ferrihydrite and Fe monosulfides). This suggests that poorly crystalline Fe phases promote DOM retention in permeable sediments, preferentially terrigenous, and aromatic fractions. Given the intense filtration of seawater through the permeable sediments, we posit that Fe can serve as an important intermediate storage for terrigenous organic matter and potentially accelerate organic matter burial in the coastal ocean.
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Affiliation(s)
- Zhe Zhou
- Alfred
Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany
- State
Key Laboratory of Marine Geology, Tongji
University, Shanghai 200092, China
| | - Hannelore Waska
- Institute
for Chemistry and Biology of the Marine Environment (ICBM), School
of Mathematics and Science, Carl von Ossietzky
Universität Oldenburg, Oldenburg 26129, Germany
| | - Susann Henkel
- Alfred
Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany
| | - Thorsten Dittmar
- Institute
for Chemistry and Biology of the Marine Environment (ICBM), School
of Mathematics and Science, Carl von Ossietzky
Universität Oldenburg, Oldenburg 26129, Germany
- Helmholtz
Institute for Functional Marine Biodiversity, University of Oldenburg, Oldenburg 26129, Germany
| | - Sabine Kasten
- Alfred
Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany
- MARUM
- Center for Marine Environmental Sciences, University of Bremen, Bremen 28359, Germany
- Faculty
of
Geosciences, University of Bremen, Bremen 28359, Germany
| | - Moritz Holtappels
- Alfred
Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany
- MARUM
- Center for Marine Environmental Sciences, University of Bremen, Bremen 28359, Germany
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8
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Xue J, Deng Y, Pi K, Fu QL, Du Y, Xu Y, Yuan X, Fan R, Xie X, Shi J, Wang Y. Enrichment of Geogenic Organoiodine Compounds in Alluvial-Lacustrine Aquifers: Molecular Constraints by Organic Matter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5932-5941. [PMID: 38502530 DOI: 10.1021/acs.est.3c07314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Organoiodine compounds (OICs) are the dominant iodine species in groundwater systems. However, molecular mechanisms underlying the geochemical formation of geogenic OICs-contaminated groundwater remain unclear. Based upon multitarget field monitoring in combination with ultrahigh-resolution molecular characterization of organic components for alluvial-lacustrine aquifers, we identified a total of 939 OICs in groundwater under reducing and circumneutral pH conditions. In comparison to those in water-soluble organic matter (WSOM) in sediments, the OICs in dissolved organic matter (DOM) in groundwater typically contain fewer polycyclic aromatics and polyphenol compounds but more highly unsaturated compounds. Consequently, there were two major sources of geogenic OICs in groundwater: the migration of the OICs from aquifer sediments and abiotic reduction of iodate coupled with DOM iodination under reducing conditions. DOM iodination occurs primarily through the incorporation of reactive iodine that is generated by iodate reduction into highly unsaturated compounds, preferably containing hydrophilic functional groups as binding sites. It leads to elevation of the concentration of the OICs up to 183 μg/L in groundwater. This research provides new insights into the constraints of DOM molecular composition on the mobilization and enrichment of OICs in alluvial-lacustrine aquifers and thus improves our understanding of the genesis of geogenic iodine-contaminated groundwater systems.
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Affiliation(s)
- Jiangkai Xue
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Yamin Deng
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Kunfu Pi
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Qing-Long Fu
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Yao Du
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Yuxiao Xu
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Xiaofang Yuan
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
| | - Ruiyu Fan
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Xianjun Xie
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Jianbo Shi
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Yanxin Wang
- Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Ministry of Education, Wuhan 430078, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
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9
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Ranheim Sveen T, Hannula SE, Bahram M. Microbial regulation of feedbacks to ecosystem change. Trends Microbiol 2024; 32:68-78. [PMID: 37500365 DOI: 10.1016/j.tim.2023.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 07/29/2023]
Abstract
Microbes are key biodiversity components of all ecosystems and control vital ecosystem functions. Although we have just begun to unravel the scales and factors that regulate microbial communities, their role in mediating ecosystem stability in response to disturbances remains underexplored. Here, we review evidence of how, when, and where microbes regulate or drive disturbance feedbacks. Negative feedbacks dampen the impacts of disturbance, which maintain ecosystem stability, whereas positive feedbacks instead erode stability by amplifying the disturbance. Here we describe the processes underlying the responses to disturbance using a hierarchy of functional traits, and we exemplify how these may drive biogeochemical feedbacks. We suggest that the feedback potential of functional traits at different hierarchical levels is contingent on the complexity and heterogeneity of the environment.
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Affiliation(s)
- T Ranheim Sveen
- Department of Ecology, Swedish University of Agricultural Sciences, Ulls Väg 16, 756 51 Uppsala, Sweden.
| | - S E Hannula
- Institute of Environmental Sciences, Leiden University, Leiden 2333, The Netherlands
| | - M Bahram
- Department of Ecology, Swedish University of Agricultural Sciences, Ulls Väg 16, 756 51 Uppsala, Sweden; Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
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10
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Li P, Liang W, Zhou Y, Yi Y, He C, Shi Q, He D. Hypoxia diversifies molecular composition of dissolved organic matter and enhances preservation of terrestrial organic carbon in the Yangtze River Estuary. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167661. [PMID: 37813254 DOI: 10.1016/j.scitotenv.2023.167661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023]
Abstract
Dissolved organic matter (DOM) is an essential component of the global carbon cycle, and estuaries link the rivers and the oceans, thus playing important roles in land-ocean DOM transformation and transport. However, the effects of hypoxia on DOM transport and fate in estuaries and coastal oceans remains poorly understood. To address this gap, we characterized the molecular composition of DOM in bottom water (BW) and sediment porewater (PW) at hypoxic and non-hypoxic sites in the Yangtze River Estuary (YRE) using ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry. Our results showed significant differences in DOM molecular composition between hypoxic and non-hypoxic areas for both BW and PW. Specifically, DOM in hypoxic sites was more recalcitrant than that in non-hypoxic areas for both BW and PW, with lower H/C, and higher O/C, double bond equivalent, and modified aromaticity index. The presence of higher polyphenols, and black carbon in hypoxic areas suggested that hypoxic conditions could facilitate the preservation of terrestrial organic matter. Furthermore, we identified a much higher number of hypoxia-unique formulas than ocean-non-hypoxia-unique formulas, indicating that hypoxia could diversify the DOM pool. Within hypoxia-unique formulas for PW, both biologically labile (unsaturated aliphatic compounds and peptides) and recalcitrant formulas (carboxyl-rich alicyclic molecules) were found, suggesting that hypoxia could facilitate the preservation of labile formulas and the production of recalcitrant formulas. In addition, we formulated that the sulfurization is more important in PW than BW in hypoxic areas based on the higher dissolved organic sulfur (DOS) abundance and larger number of hypoxia-only formulas in hypoxic PW, and also the precursor analysis results. Overall, our study provides insights into the effect of hypoxia on the molecular characteristics and preservation of DOM in estuaries and coastal oceans, highlighting the importance of considering hypoxia in understanding the biogeochemical processes of these ecosystems.
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Affiliation(s)
- Penghui Li
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, China
| | - Wenzhao Liang
- Department of Ocean Science, Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Yuping Zhou
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Yuanbi Yi
- Department of Ocean Science, Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping District, Beijing 102249, China
| | - Quan Shi
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping District, Beijing 102249, China
| | - Ding He
- Department of Ocean Science, Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Hong Kong, China; State Key Laboratory of Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
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11
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Bercovici SK, Wiemers M, Dittmar T, Niggemann J. Disentangling Biological Transformations and Photodegradation Processes from Marine Dissolved Organic Matter Composition in the Global Ocean. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:21145-21155. [PMID: 38065573 PMCID: PMC10734261 DOI: 10.1021/acs.est.3c05929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 11/03/2023] [Accepted: 11/15/2023] [Indexed: 12/20/2023]
Abstract
Dissolved organic matter (DOM) holds the largest amount of organic carbon in the ocean, with most of it residing in the deep for millennia. Specific mechanisms and environmental conditions responsible for its longevity are still unknown. Microbial transformations and photochemical degradation of DOM in the surface layers are two processes that shape its molecular composition. We used molecular data (via Fourier transform ion cyclotron resonance mass spectrometry) from two laboratory experiments that focused on (1) microbial processing of fresh DOM and (2) photodegradation of deep-sea DOM to derive independent process-related molecular indices for biological formation and transformation (Ibio) and photodegradation (Iphoto). Both indices were applied to a global ocean data set of DOM composition. The distributions of Iphoto and Ibio were consistent with increased photodegradation and biological reworking of DOM in sunlit surface waters, and traces of these surface processes were evident at depth. Increased Ibio values in the deep Southern Ocean and South Atlantic implied export of microbially reworked DOM. Photodegraded DOM (increased Iphoto) in the deep subtropical gyres of Atlantic and Pacific oceans suggested advective transport in warm-core eddies. The simultaneous application of Iphoto and Ibio disentangled and assessed two processes that left unique molecular signatures in the global ocean.
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Affiliation(s)
- Sarah K. Bercovici
- Institute
for Chemistry and Biology of the Marine Environment (ICBM), School
of Mathematics and Science, Carl von Ossietzky
Universität Oldenburg, Ammerländer Heerstraße 114-118, Oldenburg 26129, Germany
- National
Oceanography Centre, European Way, Southampton SO14 3ZH, Hampshire, United Kingdom
| | - Maren Wiemers
- Institute
for Chemistry and Biology of the Marine Environment (ICBM), School
of Mathematics and Science, Carl von Ossietzky
Universität Oldenburg, Ammerländer Heerstraße 114-118, Oldenburg 26129, Germany
| | - Thorsten Dittmar
- Institute
for Chemistry and Biology of the Marine Environment (ICBM), School
of Mathematics and Science, Carl von Ossietzky
Universität Oldenburg, Ammerländer Heerstraße 114-118, Oldenburg 26129, Germany
- Helmholtz
Institute for Functional Marine Biodiversity (HIFMB), Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky-Straße 9-11, Oldenburg 26129, Lower Saxony, Germany
| | - Jutta Niggemann
- Institute
for Chemistry and Biology of the Marine Environment (ICBM), School
of Mathematics and Science, Carl von Ossietzky
Universität Oldenburg, Ammerländer Heerstraße 114-118, Oldenburg 26129, Germany
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12
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Yi Y, Liu T, Merder J, He C, Bao H, Li P, Li S, Shi Q, He D. Unraveling the Linkages between Molecular Abundance and Stable Carbon Isotope Ratio in Dissolved Organic Matter Using Machine Learning. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:17900-17909. [PMID: 37079797 DOI: 10.1021/acs.est.3c00221] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Dissolved organic matter (DOM) is a complex mixture of molecules that constitutes one of the largest reservoirs of organic matter on Earth. While stable carbon isotope values (δ13C) provide valuable insights into DOM transformations from land to ocean, it remains unclear how individual molecules respond to changes in DOM properties such as δ13C. To address this, we employed Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to characterize the molecular composition of DOM in 510 samples from the China Coastal Environments, with 320 samples having δ13C measurements. Utilizing a machine learning model based on 5199 molecular formulas, we predicted δ13C values with a mean absolute error (MAE) of 0.30‰ on the training data set, surpassing traditional linear regression methods (MAE 0.85‰). Our findings suggest that degradation processes, microbial activities, and primary production regulate DOM from rivers to the ocean continuum. Additionally, the machine learning model accurately predicted δ13C values in samples without known δ13C values and in other published data sets, reflecting the δ13C trend along the land to ocean continuum. This study demonstrates the potential of machine learning to capture the complex relationships between DOM composition and bulk parameters, particularly with larger learning data sets and increasing molecular research in the future.
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Affiliation(s)
- Yuanbi Yi
- Department of Ocean Science and Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Hong Kong, Hong Kong SAR, China
| | - Tongcun Liu
- School of Mathematics and Computer Science, Zhejiang A&F University, Hangzhou 311300, China
| | - Julian Merder
- Department of Global Ecology, Carnegie Institution for Science, Stanford, California 94305, United States
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Hongyan Bao
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Penghui Li
- School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Siliang Li
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Quan Shi
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Ding He
- Department of Ocean Science and Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Hong Kong, Hong Kong SAR, China
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, Hong Kong SAR, China
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13
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Sun Q, Burton ED, Si D, Fan T, Cheng H, Yu Z, Shao X, Cui P, Wang Y. Coupling of Dissolved Organic Matter Molecular Fractionation with Iron and Sulfur Transformations during Sulfidation-Reoxidation Cycling. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:16327-16339. [PMID: 37859467 DOI: 10.1021/acs.est.3c03613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Iron (oxyhydr)oxides and organic matter (OM) are intimately associated in natural environments, and their fate might be linked to sulfur during sulfidation-reoxidation cycling. However, the coupling of DOM molecular fractionation with Fe and S transformations following a full sulfidation-reoxidation cycle remains poorly understood. Here, we reacted Fh and Fh-OM associations with S(-II) anaerobically and then exposed the sulfidic systems to air. S(-II) preferentially reacted with Fh to form inorganic S (e.g., mackinawite, S0, and S22-) over being incorporated into OM as organic S and therefore indirectly affected OM fate by altering Fe speciation. Fh sulfidation was inhibited by associated OM, and the main secondary Fe species were mackinawite, Fe(II)-OM compounds, and lepidocrocite. Concomitantly, organic molecules high in unsaturation, aromaticity, and molecular weight were detached from solid-phase Fe species due to their lower affinities for secondary Fe species than for Fh. During the reoxidation stage, the previously formed Fe(II) species were reoxidized to Fh with a stronger aggregation, which recaptured formerly released OM with higher selectivity. Additionally, •OH was generated from Fe(II) oxygenation and degraded a portion of the DOM molecules. Overall, these results have significant implications for Fe, C, and S cycling in S-rich environments characterized by oscillating redox conditions.
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Affiliation(s)
- Qian Sun
- College of Agricultural Sciences and Engineering, Hohai University, Nanjing 210098, China
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008, China
| | - Edward D Burton
- Faculty of Science and Engineering, Southern Cross University, Lismore, NSW 2480, Australia
| | - Dunfeng Si
- State Key Laboratory of Pollution Control and Resource Research, School of Environment, Nanjing University, Nanjing 210008, China
| | - Tingting Fan
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of the People's Republic of China, Nanjing 210008, China
| | - Hu Cheng
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Zhenghong Yu
- College of Agricultural Sciences and Engineering, Hohai University, Nanjing 210098, China
| | - Xiaohou Shao
- College of Agricultural Sciences and Engineering, Hohai University, Nanjing 210098, China
| | - Peixin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008, China
| | - Yujun Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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14
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Gao Z, Guo H, Chen D, Yu C, He C, Shi Q, Qiao W, Kersten M. Transformation of dissolved organic matter and related arsenic mobility at a surface water-groundwater interface in the Hetao Basin, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122202. [PMID: 37453683 DOI: 10.1016/j.envpol.2023.122202] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/26/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Porewater arsenic mobility above the groundwater table has been recognized as a potential cause of arsenic-rich groundwater, but the processing pathways of dissolved organic matter (DOM) in that hyporheic zone and their effect on porewater arsenic release remain poorly understood. To address these issues, two porewater profiles were sampled in a surface water-groundwater interaction zone from the Hetao Basin, China, to monitor the porewater geochemistry and DOM molecular characteristics. The results show that the porewater arsenic, Fe(II), and DOC concentrations were all significantly higher than those of the intruding pond water, and were located above the conservative mixing model lines. This indicates a net release of these solutes from the sediment. By comparing the porewater with pond water DOM, we found that the carboxyl-rich alicyclic molecules (CRAM) were selectively preserved, carbohydrates and aliphatics/proteins were preferentially consumed, and low O/C-ratio compounds with high bioproduction index (I_bioprod) and terrestrial index (I_terr) were produced. The transformation of CHO to CHOS compounds also represented a pathway of recalcitrant DOM production. The produced recalcitrant organic compounds mostly contributed to the elevated porewater DOC concentrations, but their contribution decreased along the filtration path. The consumption of labile DOM compounds would be responsible for Fe(III) hydroxide reduction and arsenic release. The generated recalcitrant DOM may also be a driver of porewater arsenic mobility by acting as electron shuttles. This study highlights the importance of the hyporheic zone in shaping shallow groundwater DOM composition and the potential contribution to arsenic enrichment.
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Affiliation(s)
- Zhipeng Gao
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing, 100083, PR China; MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, and School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Huaming Guo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing, 100083, PR China; MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, and School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Dou Chen
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, and School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Chen Yu
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, and School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, PR China
| | - Quan Shi
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, PR China
| | - Wen Qiao
- China Institute of Geo-Environment Monitoring, China Geological Survey, Beijing, 100081, PR China
| | - Michael Kersten
- Environmental Geochemistry Group, Institute of Geosciences, Johannes Gutenberg-University, Mainz, 55099, Germany
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15
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Wang H, Peng Y, Li C, Cao X, Cheng M, Bao H. Sulfate triple-oxygen-isotope evidence confirming oceanic oxygenation 570 million years ago. Nat Commun 2023; 14:4315. [PMID: 37463883 DOI: 10.1038/s41467-023-39962-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 07/05/2023] [Indexed: 07/20/2023] Open
Abstract
The largest negative inorganic carbon isotope excursion in Earth's history, namely the Ediacaran Shuram Excursion (SE), closely followed by early animal radiation, has been widely interpreted as a consequence of oceanic oxidation. However, the primary nature of the signature, source of oxidants, and tempo of the event remain contested. Here, we show that carbonate-associated sulfate (CAS) from three different paleocontinents all have conspicuous negative 17O anomalies (Δ'17OCAS values down to -0.53‰) during the SE. Furthermore, the Δ'17OCAS varies in correlation with its corresponding δ34SCAS and δ18OCAS as well as the carbonate δ13Ccarb, decreasing initially followed by a recovery over the ~7-Myr SE duration. In a box-model examination, we argue for a period of sustained water-column ventilation and consequently enhanced sulfur oxidation in the SE ocean. Our findings reveal a direct involvement of mass-anomalously 17O-depleted atmospheric O2 in marine sulfate formation and thus a primary global oceanic oxygenation event during the SE.
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Affiliation(s)
- Haiyang Wang
- International Center for Isotope Effects Research, Nanjing University, Nanjing, China
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation & Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, China
- International Center for Sedimentary Geochemistry and Biogeochemistry Research, Chengdu University of Technology, Chengdu, China
| | - Yongbo Peng
- International Center for Isotope Effects Research, Nanjing University, Nanjing, China.
- Frontiers Science Center for Critical Earth Material Cycling and State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China.
| | - Chao Li
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation & Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, China.
- International Center for Sedimentary Geochemistry and Biogeochemistry Research, Chengdu University of Technology, Chengdu, China.
- Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources, Chengdu University of Technology, Chengdu, China.
| | - Xiaobin Cao
- International Center for Isotope Effects Research, Nanjing University, Nanjing, China
- Frontiers Science Center for Critical Earth Material Cycling and State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
| | - Meng Cheng
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation & Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, China
- International Center for Sedimentary Geochemistry and Biogeochemistry Research, Chengdu University of Technology, Chengdu, China
- Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources, Chengdu University of Technology, Chengdu, China
| | - Huiming Bao
- International Center for Isotope Effects Research, Nanjing University, Nanjing, China.
- Frontiers Science Center for Critical Earth Material Cycling and State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China.
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16
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Zheng W, Zhou A, Sahoo SK, Nolan MR, Ostrander CM, Sun R, Anbar AD, Xiao S, Chen J. Recurrent photic zone euxinia limited ocean oxygenation and animal evolution during the Ediacaran. Nat Commun 2023; 14:3920. [PMID: 37400445 DOI: 10.1038/s41467-023-39427-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/12/2023] [Indexed: 07/05/2023] Open
Abstract
The Ediacaran Period (~635-539 Ma) is marked by the emergence and diversification of complex metazoans linked to ocean redox changes, but the processes and mechanism of the redox evolution in the Ediacaran ocean are intensely debated. Here we use mercury isotope compositions from multiple black shale sections of the Doushantuo Formation in South China to reconstruct Ediacaran oceanic redox conditions. Mercury isotopes show compelling evidence for recurrent and spatially dynamic photic zone euxinia (PZE) on the continental margin of South China during time intervals coincident with previously identified ocean oxygenation events. We suggest that PZE was driven by increased availability of sulfate and nutrients from a transiently oxygenated ocean, but PZE may have also initiated negative feedbacks that inhibited oxygen production by promoting anoxygenic photosynthesis and limiting the habitable space for eukaryotes, hence abating the long-term rise of oxygen and restricting the Ediacaran expansion of macroscopic oxygen-demanding animals.
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Affiliation(s)
- Wang Zheng
- School of Earth System Science, Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China
| | - Anwen Zhou
- School of Earth System Science, Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China
- Department of Earth, Ocean and Atmospheric Science and National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32306, USA
| | | | - Morrison R Nolan
- Department of Geosciences, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Chadlin M Ostrander
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, USA
- Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, 84112, USA
| | - Ruoyu Sun
- School of Earth System Science, Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China
| | - Ariel D Anbar
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ, 85287, USA
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Shuhai Xiao
- Department of Geosciences, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Jiubin Chen
- School of Earth System Science, Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China.
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17
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Poulin BA. Selective Photochemical Oxidation of Reduced Dissolved Organic Sulfur to Inorganic Sulfate. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 2023; 10:499-505. [PMID: 37333940 PMCID: PMC10275504 DOI: 10.1021/acs.estlett.3c00210] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/26/2023] [Accepted: 04/26/2023] [Indexed: 06/20/2023]
Abstract
The chemical nature and stability of reduced dissolved organic sulfur (DOSRed) have implications on the biogeochemical cycling of trace and major elements across fresh and marine aquatic environments, but the underlying processes governing DOSRed stability remain obscure. Here, dissolved organic matter (DOM) was isolated from a sulfidic wetland, and laboratory experiments quantified dark and photochemical oxidation of DOSRed using atomic-level measurement of sulfur X-ray absorption near-edge structure (XANES) spectroscopy. DOSRed was completely resistant to oxidation by molecular oxygen in the dark and underwent rapid and quantitative oxidation to inorganic sulfate (SO42-) in the presence of sunlight. The rate of DOSRed oxidation to SO42- greatly exceeded that of DOM photomineralization, resulting in a 50% loss of total DOS and 78% loss of DOSRed over 192 h of irradiance. Sulfonates (DOSSO3) and other minor oxidized DOS functionalities were not susceptible to photochemical oxidation. The observed susceptibility of DOSRed to photodesulfurization, which has implications on carbon, sulfur, and mercury cycling, should be comprehensively evaluated across diverse aquatic environments of differing DOM composition.
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Affiliation(s)
- Brett A. Poulin
- Department
of Environmental Toxicology, University
of California Davis, Davis, California 95616, United States
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18
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Kida M, Merder J, Fujitake N, Tanabe Y, Hayashi K, Kudoh S, Dittmar T. Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:5464-5473. [PMID: 36947486 PMCID: PMC10077579 DOI: 10.1021/acs.est.3c00249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/10/2023] [Accepted: 03/13/2023] [Indexed: 06/18/2023]
Abstract
Identifying drivers of the molecular composition of dissolved organic matter (DOM) is essential to understand the global carbon cycle, but an unambiguous interpretation of observed patterns is challenging due to the presence of confounding factors that affect the DOM composition. Here, we show, by combining ultrahigh-resolution mass spectrometry and nuclear magnetic resonance spectroscopy, that the DOM molecular composition varies considerably among 43 lakes in East Antarctica that are isolated from terrestrial inputs and human influence. The DOM composition in these lakes is primarily driven by differences in the degree of photodegradation, sulfurization, and pH. Remarkable molecular beta-diversity of DOM was found that rivals the dissimilarity between DOM of rivers and the deep ocean, which was driven by environmental dissimilarity rather than the spatial distance. Our results emphasize that the extensive molecular diversity of DOM can arise even in one of the most pristine and organic matter source-limited environments on Earth, but at the same time the DOM composition is predictable by environmental variables and the lakes' ecological history.
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Affiliation(s)
- Morimaru Kida
- Research
Group for Marine Geochemistry (ICBM-MPI Bridging Group), Institute
for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, Oldenburg 26129, Germany
- Soil
Science Laboratory, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Julian Merder
- Department
of Global Ecology, Carnegie Institution
for Science, 260 Panama Street, Stanford, California 94305, United States
| | - Nobuhide Fujitake
- Soil
Science Laboratory, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Yukiko Tanabe
- National
Institute of Polar Research, Research Organization of Information
and Systems, 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan
- Department
of Polar Science, SOKENDAI (The Graduate
University for Advanced Studies), 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan
| | - Kentaro Hayashi
- Institute
for Agro-Environmental Sciences, NARO, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan
| | - Sakae Kudoh
- National
Institute of Polar Research, Research Organization of Information
and Systems, 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan
- Department
of Polar Science, SOKENDAI (The Graduate
University for Advanced Studies), 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan
| | - Thorsten Dittmar
- Research
Group for Marine Geochemistry (ICBM-MPI Bridging Group), Institute
for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, Oldenburg 26129, Germany
- Helmholtz
Institute for Functional Marine Biodiversity (HIFMB) at the University
of Oldenburg, Oldenburg 26129, Germany
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19
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Simonović N, Dominović I, Marguš M, Matek A, Ljubešić Z, Ciglenečki I. Dynamics of organic matter in the changing environment of a stratified marine lake over two decades. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 865:161076. [PMID: 36565878 DOI: 10.1016/j.scitotenv.2022.161076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/16/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
The marine lake (Rogoznica Lake), which fluctuates between stratified and holomictic conditions, is a unique environment on the eastern Adriatic coast affected by environmental changes. These changes are reflected in the warming of the water column, the apparent deoxygenation of the epilimnion, and the accumulation of organic matter (OM), toxic sulfide, and ammonium in the anoxic hypolimnion. Since the early 1990s, the volume of anoxic water has increased as the chemocline has moved to the surface water layer. A trend toward enrichment of refractory dissolved organic carbon (DOC) was observed in the anoxic hypolimnion, while a decreasing trend was observed in the oxic epilimnion in the spring DOC. At the same time, the most reactive surface-active fraction of DOC showed the opposite trend. In addition, there is evidence of accumulation of particulate organic carbon (POC) in the water column, followed by an increase in the fraction of POC in total organic carbon (TOC). On a multi-year scale (1996-2020), this work presents a unique time series of the dynamics of OM in the stratified marine system, showing a significant change in its quantity and quality due to climate and environmental variability. DOC-normalized surfactant activity is shown to be a good indicator of environmental change.
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Affiliation(s)
- Niki Simonović
- Laboratory for Physical Oceanography and Chemistry of Aquatic Systems, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
| | - Iva Dominović
- Laboratory for Physical Oceanography and Chemistry of Aquatic Systems, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
| | - Marija Marguš
- Laboratory for Physical Oceanography and Chemistry of Aquatic Systems, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
| | - Antonija Matek
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Zrinka Ljubešić
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Irena Ciglenečki
- Laboratory for Physical Oceanography and Chemistry of Aquatic Systems, Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia.
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20
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Holatko J, Brtnicky M, Mustafa A, Kintl A, Skarpa P, Ryant P, Baltazar T, Malicek O, Latal O, Hammerschmiedt T. Effect of Digestate Modified with Amendments on Soil Health and Plant Biomass under Varying Experimental Durations. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1027. [PMID: 36770034 PMCID: PMC9920836 DOI: 10.3390/ma16031027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/31/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
A digestate with amendments provides plants with available nutrients and improves the microbiological properties of treated soil. Modification of a digestate through the addition of a biochar and sulphur source is less well-known. This pot experiment aimed at comparing the short- and long-time fertilization effects of a digestate enriched with biochar, with elemental sulphur, or with a combination of both on soil health and plant biomass. The experiment was carried out with maize, cultivated twice (1st-12th week = pre-cultivation; re-sowing after shoot harvest, 13th-24th = main cultivation) in soil amended with prepared digestate. The digestate used in pre-cultivation was incubated untreated (D) and was then treated with biochar (D + B), with elemental sulphur at a low (LS) and high (HS) dose, or with a combination of both (D + B + LS and D + B + HS). An additional unamended digestate (D) was added to each soil variant before the main cultivation. The application of digestate with a high dose of elemental sulphur and biochar mediated the most significant differences in the soil. The increase (compared to the unamended soil) was of short-term type (+11% and +6% increased total nitrogen and carbon after 12 weeks), then of long-term type (+54% and +30% increased sulphur and arylsulfatase activity after 24 weeks), and later emerged in the 13th to the 24th week of the experiment (+57% and +32% non-inhibited urease, increased N-acetyl-β-D-glucosaminidase and phosphatase). No significant differences in the effect of the applied amendments on dry aboveground plant biomass were observed.
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Affiliation(s)
- Jiri Holatko
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
- Agrovyzkum Rapotin Ltd., Vyzkumniku 267, 788 13 Rapotin, Czech Republic
| | - Martin Brtnicky
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
- Institute of Chemistry and Technology of Environmental Protection, Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic
| | - Adnan Mustafa
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
- Institute of Chemistry and Technology of Environmental Protection, Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic
- Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Benatska 2, 128 00 Praha, Czech Republic
| | - Antonin Kintl
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
- Agricultural Research Ltd., Zahradni 400/1, 664 41 Troubsko, Czech Republic
| | - Petr Skarpa
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - Pavel Ryant
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - Tivadar Baltazar
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - Ondrej Malicek
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - Oldrich Latal
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
- Agrovyzkum Rapotin Ltd., Vyzkumniku 267, 788 13 Rapotin, Czech Republic
| | - Tereza Hammerschmiedt
- Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
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21
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Novel sulfur isotope analyses constrain sulfurized porewater fluxes as a minor component of marine dissolved organic matter. Proc Natl Acad Sci U S A 2022; 119:e2209152119. [PMID: 36201540 PMCID: PMC9565371 DOI: 10.1073/pnas.2209152119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Marine dissolved organic matter (DOM) is a major reservoir that links global carbon, nitrogen, and phosphorus. DOM is also important for marine sulfur biogeochemistry as the largest water column reservoir of organic sulfur. Dissolved organic sulfur (DOS) can originate from phytoplankton-derived biomolecules in the surface ocean or from abiotically "sulfurized" organic matter diffusing from sulfidic sediments. These sources differ in 34S/32S isotope ratios (δ34S values), with phytoplankton-produced DOS tracking marine sulfate (21‰) and sulfurized DOS mirroring sedimentary porewater sulfide (∼0 to -10‰). We measured the δ34S values of solid-phase extracted (SPE) DOM from marine water columns and porewater from sulfidic sediments. Marine DOMSPE δ34S values ranged from 14.9‰ to 19.9‰ and C:S ratios from 153 to 303, with lower δ34S values corresponding to higher C:S ratios. Marine DOMSPE samples showed consistent trends with depth: δ34S values decreased, C:S ratios increased, and δ13C values were constant. Porewater DOMSPE was 34S-depleted (∼-0.6‰) and sulfur-rich (C:S ∼37) compared with water column samples. We interpret these trends as reflecting at most 20% (and on average ∼8%) contribution of abiotic sulfurized sources to marine DOSSPE and conclude that sulfurized porewater is not a main component of oceanic DOS and DOM. We hypothesize that heterogeneity in δ34S values and C:S ratios reflects the combination of sulfurized porewater inputs and preferential microbial scavenging of sulfur relative to carbon without isotope fractionation. Our findings strengthen links between oceanic sulfur and carbon cycling, supporting a realization that organic sulfur, not just sulfate, is important to marine biogeochemistry.
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22
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Ma H, Wang P, Thompson A, Xie Q, Zhu M, Teng HH, Fu P, Liu C, Chen C. Secondary Mineral Formation and Carbon Dynamics during FeS Oxidation in the Presence of Dissolved Organic Matter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:14120-14132. [PMID: 36151962 DOI: 10.1021/acs.est.1c08727] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Iron (Fe) minerals constitute a major control on organic carbon (OC) storage in soils and sediments. While previous research has mainly targeted Fe (oxyhydr)oxides, the impact of Fe sulfides and their subsequent oxidation on OC dynamics remains unresolved in redox-fluctuating environments. Here, we investigated the impact of dissolved organic matter (DOM) on FeS oxidation and how FeS and its oxidation may alter the retention and nature of DOM. After the anoxic reaction of DOM with FeS, FeS preferentially removed high-molecular-weight and nitrogen-rich compounds and promoted the formation of aqueous sulfurized organic molecules, according to Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS) analysis. When exposed to O2, FeS oxidized to nanocrystalline lepidocrocite and additional aqueous sulfurized organic compounds were generated. The presence of DOM decreased the particle size of the resulting nano-lepidocrocite based on Mössbauer spectroscopy. Following FeS oxidation, most solid-phase OC remained associated with the newly formed lepidocrocite via a monodentate chelating mechanism (based on FTIR analysis), and FeS oxidation caused only a slight increase in the solubilization of solid-phase OC. Collectively, this work highlights the under-appreciated role of Fe sulfides and their oxidation in driving OC transformation and preservation.
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Affiliation(s)
- Hua Ma
- School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Pinya Wang
- School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Aaron Thompson
- Department of Crop and Soil Sciences, University of Georgia, Athens, Georgia 30602, United States
| | - Qiaorong Xie
- School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Henry H Teng
- School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Pingqing Fu
- School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Congqiang Liu
- School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Chunmei Chen
- School of Earth System Science, Tianjin University, Tianjin 300072, China
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23
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Osterholz H, Turner S, Alakangas LJ, Tullborg EL, Dittmar T, Kalinowski BE, Dopson M. Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield. Nat Commun 2022; 13:4837. [PMID: 35977924 PMCID: PMC9385861 DOI: 10.1038/s41467-022-32457-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 08/01/2022] [Indexed: 11/09/2022] Open
Abstract
The deep terrestrial biosphere encompasses the life below the photosynthesis-fueled surface that perseveres in typically nutrient and energy depleted anoxic groundwaters. The composition and cycling of this vast dissolved organic matter (DOM) reservoir relevant to the global carbon cycle remains to be deciphered. Here we show that recent Baltic Sea-influenced to ancient pre-Holocene saline Fennoscandian Shield deep bedrock fracture waters carried DOM with a strong terrigenous signature and varying contributions from abiotic and biotic processes. Removal of easily degraded carbon at the surface-to-groundwater transition and corresponding microbial community assembly processes likely resulted in the highly similar DOM signatures across the notably different water types that selected for a core microbiome. In combination with the aliphatic character, depleted δ13C signatures in DOM indicated recent microbial production in the oldest, saline groundwater. Our study revealed the persistence of terrestrially-sourced carbon in severely energy limited deep continental groundwaters supporting deep microbial life.
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Affiliation(s)
- Helena Osterholz
- Marine Chemistry, Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany.
| | - Stephanie Turner
- Ecology and Evolution in Microbial model Systems (EEMiS), Linnaeus University, Kalmar, Sweden.,Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Linda J Alakangas
- Ecology and Evolution in Microbial model Systems (EEMiS), Linnaeus University, Kalmar, Sweden.,Swedish Nuclear Fuel and Waste Management Company, Äspö Hard Rock Laboratory, Oskarshamn, Sweden
| | | | - Thorsten Dittmar
- Marine Geochemistry, Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University, Oldenburg, Germany.,Helmholtz Institute for Functional Marine Biodiversity, Carl von Ossietzky University, Oldenburg, Germany
| | - Birgitta E Kalinowski
- Swedish Nuclear Fuel and Waste Management Company, Äspö Hard Rock Laboratory, Oskarshamn, Sweden
| | - Mark Dopson
- Ecology and Evolution in Microbial model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
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24
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Microbial sulfurization stimulates carbon sequestration in marine oxygen minimum zones. Sci Bull (Beijing) 2022; 67:895-898. [PMID: 36546020 DOI: 10.1016/j.scib.2022.01.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 01/06/2023]
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25
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Yadav S, Koenen M, Bale N, Sinninghe Damsté JS, Villanueva L. The physiology and metabolic properties of a novel, low-abundance Psychrilyobacter species isolated from the anoxic Black Sea shed light on its ecological role. ENVIRONMENTAL MICROBIOLOGY REPORTS 2021; 13:899-910. [PMID: 34668338 DOI: 10.1111/1758-2229.13012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 08/26/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Members of the Psychrilyobacter spp. of the phylum Fusobacteria have been recently suggested to be amongst the most significant primary degraders of the detrital organic matter in sulfidic marine habitats, despite representing only a small proportion (<0.1%) of the microbial community. In this study, we have isolated a previously uncultured Psychrilyobacter species (strains SD5T and BL5; Psychrilyobacter piezotolerans sp. nov.) from the sulfidic waters (i.e., 2000 m depth) of the Black Sea and investigated its physiology and genomic capability in order to better understand potential ecological adaptation strategies. P. piezotolerans utilized a broad range of organic substituents (carbohydrates and proteins) and, remarkably, grew at sulfide concentrations up to 32 mM. These flexible physiological properties were supported by the presence of the respective metabolic pathways in the genomes of both strains. Growth at varying hydrostatic pressure (0.1-50 MPa) was sustained by modifying its membrane lipid composition. Thus, we have isolated a novel member of the 'rare biosphere', which endures the extreme conditions and may play a significant role in the degradation of detrital organic matter sinking into the sulfidic waters of the Black Sea.
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Affiliation(s)
- Subhash Yadav
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, P.O. Box 59, 1797AB, Den Burg, Texel, The Netherlands
| | - Michel Koenen
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, P.O. Box 59, 1797AB, Den Burg, Texel, The Netherlands
| | - Nicole Bale
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, P.O. Box 59, 1797AB, Den Burg, Texel, The Netherlands
| | - Jaap S Sinninghe Damsté
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, P.O. Box 59, 1797AB, Den Burg, Texel, The Netherlands
- Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA, Utrecht, The Netherlands
| | - Laura Villanueva
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, P.O. Box 59, 1797AB, Den Burg, Texel, The Netherlands
- Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA, Utrecht, The Netherlands
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26
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Raven MR, Keil RG, Webb SM. Rapid, concurrent formation of organic sulfur and iron sulfides during experimental sulfurization of sinking marine particles. GLOBAL BIOGEOCHEMICAL CYCLES 2021; 35:e2021GB007062. [PMID: 35756156 PMCID: PMC9231689 DOI: 10.1029/2021gb007062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Organic matter (OM) sulfurization can enhance the preservation and sequestration of carbon in anoxic sediments, and it has been observed in sinking marine particles from marine O2-deficient zones. The magnitude of this effect on carbon burial remains unclear, however, because the transformations that occur when sinking particles encounter sulfidic conditions remain undescribed. Here, we briefly expose sinking marine particles from the eastern tropical North Pacific O2-deficient zone to environmentally relevant sulfidic conditions (20°C, 0.5 mM [poly]sulfide, two days) and then characterize the resulting solid-phase organic and inorganic products in detail. During these experiments, the abundance of organic sulfur in both hydrolyzable and hydrolysis-resistant solids roughly triples, indicating extensive OM sulfurization. Lipids also sulfurize on this timescale, albeit less extensively. In all three pools, OM sulfurization produces organic monosulfides, thiols, and disulfides. Hydrolyzable sulfurization products appear within ≤ 200-μm regions of relatively homogenous composition that are suggestive of sulfurized extracellular polymeric substances (EPS). Concurrently, reactions with particulate iron oxyhydroxides generate low and fairly uniform concentrations of iron sulfide (FeS) within these same EPS-like materials. Iron oxyhydroxides were not fully consumed during the experiment, which demonstrates that organic materials can be competitive with reactive iron for sulfide. These experiments support the hypothesis that sinking, OM- and EPS-rich particles in a sulfidic water mass can sulfurize within days, potentially contributing to enhanced sedimentary carbon sequestration. Additionally, sulfur-isotope and chemical records of organic S and iron sulfides in sediments have the potential to incorporate signals from water column processes.
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Affiliation(s)
- M R Raven
- Department of Earth Science, University of California, Santa Barbara, Santa Barbara CA 93117, USA
| | - R G Keil
- School of Oceanography, University of Washington, Seattle WA 98195, USA
| | - S M Webb
- Stanford Synchrotron Radiation Lightsource, Stanford University, Menlo Park CA 94025, USA
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