Carbon source shaped microbial ecology, metabolism and performance in denitrification systems

Water Research, Journal Year: 2023, Volume and Issue: 243, P. 120330 - 120330

Published: July 12, 2023

Language: Английский

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Molecular insights into linkages among free-floating macrophyte-derived organic matter, the fate of antibiotic residues, and antibiotic resistance genes

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 471, P. 134351 - 134351

Published: April 19, 2024

Language: Английский

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Microbial transformation mechanisms of particulate organic carbon to mineral-associated organic carbon at the chemical molecular level: Highlighting the effects of ambient temperature and soil moisture

Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 195, P. 109454 - 109454

Published: May 7, 2024

Language: Английский

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Unique dissolved organic matter molecules and microbial communities in rhizosphere of three typical crop soils and their significant associations based on FT-ICR-MS and high-throughput sequencing analysis

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 919, P. 170904 - 170904

Published: Feb. 12, 2024

Language: Английский

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Unveiling the deterministic dynamics of microbial meta-metabolism: a multi-omics investigation of anaerobic biodegradation

Microbiome, Journal Year: 2024, Volume and Issue: 12(1)

Published: Sept. 7, 2024

Language: Английский

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Wildfire Impacts on Molecular Changes of Dissolved Organic Matter during Its Passage through Soil

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(26), P. 11436 - 11446

Published: June 21, 2024

The frequency and intensity of global wildfires are escalating, leading to an increase in derived pyrogenic dissolved organic matter (pyDOM), which potentially influences the riverine carbon reservoir poses risks drinking water safety. However, changes pyDOM properties as it traverses through soil bodies highly understudied due challenges simulating such processes under laboratory conditions. In this study, we extracted DOM along hillslope gradients depths both burned unburned catchments post wildfire. Using high-resolution mass spectrometry a substrate-explicit model, observed significant increases relative abundance condensed aromatics (ConAC) tannins wildfire-affected DOM. Wildfire-affected also displayed broader spectrum molecular thermodynamic properties, indicative its diverse composition reactivity. Furthermore, fire-induced weakening topsoil microbial reprocessing abilities hindered transformation plant-derived DOM, lignin-like compounds increased with depth fire regions. Meanwhile, distribution shared formulas gradient (from shoulder toeslope) exhibited analogous patterns catchments. Although there was prevalence ConAC tannin catchments, these fractions diminished all three Based on biodegradability by offers possibility conversion hillslopes. Our findings reveal spatial after wildfire, facilitating accurate evaluation involved watershed-scale cycle.

Language: Английский

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Enhanced Release and Reactivity of Soil Water-Extractable Organic Matter Following Wildfire in a Subtropical Forest

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Climate-driven increases in wildfire frequency may disrupt soil carbon dynamics, potentially creating positive feedback within global cycle. However, the release and lability of following remain unclear, limiting our ability to predict fire impacts on cycling. Here, we investigated chemical alterations water-extractable organic matter (WEOM) a subtropical forest by comparing burned soils an adjacent unburned site. The consensus is that fire-altered DOM aromatic less reactive. found 10 months postfire, contained nearly three times more (WEOC) than control Reactomics analysis further revealed overall 8-fold increase potential reactivity this carbon, identified higher abundances molecular formulas involved microbial reaction pathways. Specifically, exhibited elevated oxidative enzyme reactions, linked nominal oxidation state (NOSC) WEOM. Metagenomic enrichment taxa specialized degrading compounds areas, supporting occurrence pathways acting WEOM postfire soils. These findings highlight wildfires accelerate loss through reactive mobilization response, with implications for long-term carbon-climate projections.

Language: Английский

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Extraction Strategies for Profiling the Molecular Composition of Particulate Organic Matter on Glacier Surfaces

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Pigmented microalgae thrive on supraglacial surfaces, producing "sticky" extracellular polymeric substances that combine into a mineral–organic matrix. Together, they enhance snow and ice melting by lowering the albedo. Understanding chemical nature of particulate organic matter (POM) in this matrix is crucial assessing its role carbon dynamics. We evaluated POM complexity alga-rich samples containing 0.3–6.4 wt % (OC) via extractions with solvents varying polarity, pH, OM selectivity. Extraction yields were OC analysis extracts, composition extracted was analyzed using ultrahigh-resolution mass spectrometry. Individual hot water (HW), hydrochloric acid (HCl), sodium hydroxide (NaOH) achieved up to 87% efficiency, outperforming sequential, solvent-based (<11%). HW, HCl, NaOH combined had more molecular formulas (2827) than (1926 formulas). Combined NaOH, HCl yielded an unsaturated, highly aromatic, N-containing compounds, while unsaturated aliphatics black carbon-derived polycyclic aromatics enriched solvent extracts. This profiling provides first comprehensive insights composition, opening window for understanding cryospheric cycle.

Language: Английский

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Bacterial Community Structure Modulates Soil Phosphorus Turnover at Early Stages of Primary Succession

Global Biogeochemical Cycles, Journal Year: 2024, Volume and Issue: 38(10)

Published: Oct. 1, 2024

Abstract Microbes are the drivers of soil phosphorus (P) cycling in terrestrial ecosystems; however, role microbes mediating P P‐rich soils during primary succession remains uncertain. This study examined impacts bacterial community structure (diversity and composition) its functional potential (absolute abundances P‐cycling genes) on along a 130‐year glacial chronosequence eastern Tibetan Plateau. Bacterial was better predictor fractions than genes chronosequence. After glacier retreat, solubilization inorganic mineralization organic were significantly enhanced by increased diversity, changed interspecific interactions, abundant species involved mineralization, thereby increasing availability. Although 84% associated with these more closely carbon P. demand probably determined turnover, indicating dominant matter decomposition processes alpine soils. Moreover, significant decrease complexity co‐occurrence network taxa‐gene‐P at later stage indicates declining dominance driving succession. Our results reveal that bacteria complex have prominent for biogeochemical early stages

Language: Английский

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Excessive Ozonation Stress Triggers Severe Membrane Biofilm Accumulation and Fouling

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(13), P. 5899 - 5910

Published: March 19, 2024

The established benefits of ozone on microbial pathogen inactivation, natural organic matter degradation, and inorganic/organic contaminant oxidation have favored its application in drinking water treatment. However, viable bacteria are still present after the ozonation raw water, bringing a potential risk to membrane filtration systems terms biofilm accumulation fouling. In this study, we shed light role specific dose (0.5 mg-O3/mg-C) during long-term ultrafiltration. Results demonstrated that transformed molecular structure influent dissolved (DOM), producing fractions were highly bioavailable at 0.5, which was inferred be turning point. With increase dose, consortium substantially shifted, demonstrating decrease richness diversity. Unexpectedly, opportunistic Legionella stimulated occurred approximately 40% relative abundance higher 1. Accordingly, system with 0.5 presented lower thickness, weaker fluorescence intensity, smaller concentrations polysaccharides proteins, Raman activity, leading hydraulic resistance, compared Our findings highlight interaction mechanism between molecular-level DOM composition, consortium, performance, provides an in-depth understanding impact accumulation.

Language: Английский

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