Optical Characteristics of Dissolved, Particulate and Sedimentary Organic Matter in Coastal Porphyra Cultivation Zone: A Case Study of Dayu Bay, China DOI Open Access
Ting Wang, Jiajun Xu, Liyin Qu

et al.

Water, Journal Year: 2025, Volume and Issue: 17(4), P. 571 - 571

Published: Feb. 17, 2025

Seaweed plays a critical role in marine carbon sequestration due to its high release rate of organic matter. However, the impacts Porphyra cultivation on concentration and composition dissolved, particulate sedimentary matter (DOM, POM SOM) coastal zones remain unclear. Herein, we investigated optical properties DOM, SOM along transect from subtropical Chi River adjacent zone Dayu Bay (southeast China) during late stage. The results revealed that all types were predominantly characterized by highly autochthonous sources, contrasting sharply with allochthonous, terrestrial sources observed at freshwater sites. estuarine mixing model principal component analysis further indicated dynamics are primarily controlled cultivation, relatively limited contributions riverine inputs, sediment porewater sources. leads significant additions protein-like components water sediment. Microbial degradation incubations DOM demonstrated promotes situ production humic-like (peak M) water. exhibited higher microbial transformation efficiency into refractory than POM, suggesting more substantial sequestration. Our findings underscore potential enhance ecosystems.

Language: Английский

The positive effect of the enzyme inducer (MnSO4) on the formation of humic substance in rice straw composting by stimulating key microorganisms DOI

Linying Mu,

Runshi Dong,

Jiaqi Wang

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 923, P. 171460 - 171460

Published: March 4, 2024

Language: Английский

Citations

21
Molecular insights into the microbial degradation of sediment-derived DOM in a macrophyte-dominated lake under aerobic and hypoxic conditions DOI

Wei Yu,

Haiquan Yang,

Jingan Chen

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 916, P. 170257 - 170257

Published: Jan. 21, 2024

Language: Английский

Citations

17
Review of Effects of Dam Construction on the Ecosystems of River Estuary and Nearby Marine Areas DOI Open Access
Xuan Zhang,

Changling Fang,

Yuan Wang

et al.

Sustainability, Journal Year: 2022, Volume and Issue: 14(10), P. 5974 - 5974

Published: May 14, 2022

Dams have made great contributions to human society, facilitating flood control, power generation, shipping, agriculture, and industry. However, the construction of dams greatly impacts downstream ecological environments nearby marine areas. The present manuscript presents a comprehensive review influence activities on environment, especially effect dam ecosystems river estuaries areas, so as provide scientific basis for environment protection. To summarize these impacts, this used recent studies comprehensively analyze how has affected hydrology, geomorphology, globally. Effects occur through reduced flow, sediment flux, altered water temperature, changed estuary delta, composition distribution nutrients, structure phytoplankton populations, habitat fragmentation, blocked migration routes in sections adjacent seas. (especially Three Gorges Dam) Yangtze River were also reviewed. Performing community mitigation planning before construction, exploring new reservoir management strategies (including targeted control storage flushing operations), banning fishing activities, removing unnecessary (obsolete or small dams) are becoming crucial tools ecosystem restoration.

Language: Английский

Citations

39
Niche differentiation of microbial community shapes vertical distribution of recalcitrant dissolved organic matter in deep-sea sediments DOI Creative Commons
Xiaoxia Chen, Ruanhong Cai,

Xiaocun Zhuo

et al.

Environment International, Journal Year: 2023, Volume and Issue: 178, P. 108080 - 108080

Published: July 1, 2023

Sedimentary organic matter provides carbon substrates and energy sources for microorganisms, which drive benthic biogeochemical processes in turn modify the quantity quality of dissolved (DOM). However, molecular composition distribution DOM its interactions with microbes deep-sea sediments remain poorly understood. Here, relationship were analyzed samples collected from two sediment cores (∼40 cm below sea floor), at depths 1157 2253 m South China Sea. Results show that niche differentiation was observed on a fine scale different layers, Proteobacteria Nitrososphaeria dominating shallow (0-6 cm) Chloroflexi Bathyarchaeia prevailing deeper (6-40 cm), indicating correspondence microbial community both geographical isolation availability matter. An intimate link between further indicates that, mineralization fresh layer potentially resulted accumulation recalcitrant (RDOM), while relatively low abundance RDOM linked to anaerobic utilization layers. In addition, higher overlying water, as compared surface sediment, suggests might be source RDOM. These results emphasize close relation community, laying foundation understanding complex dynamics water column.

Language: Английский

Citations

31
Will various interpretation strategies of the same ultrahigh‐resolution mass spectrometry data tell different biogeochemical stories? A first assessment based on natural aquatic dissolved organic matter DOI
Yuanbi Yi, Chen He,

Katrin Klaproth

et al.

Limnology and Oceanography Methods, Journal Year: 2023, Volume and Issue: 21(6), P. 320 - 333

Published: May 10, 2023

Abstract Fourier ion cyclotron resonance mass spectrometry (FT‐ICR MS), one of the state‐of‐the‐art ultrahigh‐resolution techniques, is widely used in dissolved organic matter (DOM) research. As research that focuses on identifying DOM molecular fingerprints increases tremendously, there and will be an urgent need to compare among studies. Different groups usually use various types data processing interpretation strategies. It critical explore if different strategies impact comparability FT‐ICR MS results their biogeochemical interpretations. To address this question, we selected samples along a freshwater‐to‐marine continuum measured by negative‐ion mode electrospray ionization MS. We interpreted raw using strategies, compared evaluated strategy‐induced effects Our show total 3827 formulas account for 91.6% ± 4.1% (on average) intensity are assigned all while 6521 8.4% not commonly three conclude (i) do significantly affect geochemical stories relied composition, (ii) comparison based gives more reliable than formular number alone. Moreover, also provide (by our strategies) community interpretation. aim call attention improving facilitating integration composition global

Language: Английский

Citations

25
Dissolved organic matter evolution and straw decomposition rate characterization under different water and fertilizer conditions based on three-dimensional fluorescence spectrum and deep learning DOI Open Access
Guang Yang, Hongwei Pan, Hongjun Lei

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 344, P. 118537 - 118537

Published: July 3, 2023

Language: Английский

Citations

25
Molecular composition of dissolved organic matter across diverse ecosystems: Preliminary implications for biogeochemical cycling DOI
Chen He, Yuanbi Yi, Ding He

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 344, P. 118559 - 118559

Published: July 5, 2023

Language: Английский

Citations

25
Molecular Responses of Dissolved Organic Matter to Anthropogenic Groundwater Recharge: Characteristics, Transformations, and Sensitive Molecules DOI

Xianjiang Zeng,

Yaxin Zheng,

Xiaorui Chen

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(20), P. 7789 - 7799

Published: May 9, 2023

The groundwater quality impacts associated with anthropogenic recharge (AGR) are of great concern for water management. However, the AGR on molecular properties dissolved organic matter (DOM) in aquifers poorly understood. Herein, Fourier transform ion cyclotron resonance mass spectrometry was used to unravel characteristics DOM groundwaters from areas by reclaimed (RWRA) and natural South-to-North Water Diversion Project (SNWRA). Compared RWRA groundwater, significantly fewer nitrogenous compounds, more sulfur-containing higher concentrations NO3–N, lower pH were observed SNWRA indicating occurrence deamination, sulfurization, nitrification. these processes further supported transformations molecules related nitrogen sulfur relative groundwater. intensities most common all samples correlated indicators (e.g., Cl– NO3–N) fluorescent humic-like components (C1%)), that those may have potential track environmental impact especially specific having mobility being other inert tracers like C1% Cl–. This study is helpful understand risks regional applicability AGR.

Language: Английский

Citations

23
Spatial gradients and molecular transformations of DOM, DON and DOS in human-impacted estuarine sediments DOI Creative Commons

Zhaokui Ni,

Yue Wu,

Yu Ma

et al.

Environment International, Journal Year: 2024, Volume and Issue: 185, P. 108518 - 108518

Published: Feb. 23, 2024

Dissolved organic matter (DOM) constitutes the most active fraction in global carbon pools, with estuarine sediments serving as significant repositories, where DOM is susceptible to dynamic transformations. Anthropogenic nitrogen (N) and sulfur (S) inputs further complicate by creating N-bearing (DON) S-bearing (DOS). This study delves into spatial gradients transformation mechanisms of DOM, DON, DOS Pearl River Estuary (PRE) sediments, China, using combined techniques UV-visible spectroscopy, Excitation-emission matrix (EEM) fluorescence Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), microbial high-throughput sequencing. Results uncovered a distinct gradient concentration, aromaticity (SUV

Language: Английский

Citations

11
Spatial distribution characteristics and interaction effects of DOM and microbial communities in kelp cultivation areas DOI
Huiling Huang,

Shuaijun Zan,

Kuishuang Shao

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 920, P. 170511 - 170511

Published: Feb. 2, 2024

Language: Английский

Citations

10