Priming effect of different DOM components on the degradation of organic matter during the decomposition period of Phragmites australis: Microbiological mechanisms

IF 6.3 2区 工程技术 Q1 ENGINEERING, CHEMICAL Journal of water process engineering Pub Date : 2025-03-13 DOI:10.1016/j.jwpe.2025.107463
Junhao Chen, Huiyan Shen, Xiang Zhang, Weihua Li, Jin Zhang
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Abstract

Dissolved organic matter (DOM), as nutrient source for the survival and metabolism of microorganisms, has a significant impact on the decomposition process of aquatic plants. However, the priming effects (PE) of different DOM components on plant degradation and the mechanisms of microbial community composition remain unclear. In this study, the microenvironment constructed by Phragmites australis, DOM, and microorganisms. The PE of DOM components on the decomposition of aquatic plants and its microbial mechanisms were investigated through microbial sequencing technology and spectral analysis. Results show that adding DOM components alters the overlying water's chemical environment, generating PE of −66 % to 67 % for nitrogen and phosphorus release, with positive PE lasting 1–16 days. Also, adding DOM components yields positive PE up to 414 % for the degradation of the same-type DOM components released during decomposition. The addition of DOM not only directly affected the microbial community but also influenced the community through changes in environmental physicochemical factors. Tryptophan and tyrosine's addition increased the relative abundance of bacterial genera such as Singulisphaera and Paludisphaera, which were significantly correlated with the C1 and C2 components. Compared with amino acids, glucose addition could quickly induce the response of dominant populations. The relative abundance of Bacteroidetes, which decomposes and metabolizes recalcitrant organic matter, increased by up to 23 % with the addition of humic acid. In conclusion, different DOM components could affect organic matter degradation during the decomposition of aquatic plants by regulating microbial community structure, which has important implications for understanding matter cycling in lakes.
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来源期刊
Journal of water process engineering
Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology
CiteScore
10.70
自引率
8.60%
发文量
846
审稿时长
24 days
期刊介绍: The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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