Exometabolomic exploration of culturable airborne microorganisms from an urban atmosphere

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(3), P. 1805 - 1829

Published: Feb. 10, 2025

Abstract. The interactions of metabolically active atmospheric microorganisms with cloud organic matter can alter the carbon cycle. Upon deposition, influence microbial communities in surface Earth systems. However, metabolic activities cultivable settled habitats remain less understood. Here, we cultured typical bacterial and fungal species isolated from urban atmosphere using tryptic soy broth (TSB) Sabouraud dextrose (SDB), respectively, investigated their exometabolites to elucidate potential roles biogeochemical cycles. Molecular compositions were analyzed ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry. Annotation through Kyoto Encyclopedia Genes Genomes database helped identify processes. Results showed that strains produced lower H / C higher O ratios compared both consumed resistant compounds. As CHON compounds are abundant TSB (85 %) SDB (78 %), also constituted over 50 % identified exometabolite formulas. Bacterial more CHONS (25.2 while rich CHO (31.7 %). These predominantly comprised aliphatic/peptide-like carboxyl-rich alicyclic molecule (CRAM)-like Significant variations metabolites observed among different strains. Bacteria exhibited proficiency amino acid synthesis, fungi actively involved metabolism, transcription, expression Lipid carbohydrate metabolism varied widely strains, notable differences secondary metabolism. This study provides new insights into transformation oxidative capacity concerning at air–land/water interfaces. findings pivotal for assessing impacts clouds or following deposition.

Language: Английский

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Microbial transformation of sulfur-containing dissolved organic matter in the intertidal zone of a mountainous river estuary responding to tidal fluctuation

Environmental Research, Journal Year: 2025, Volume and Issue: 274, P. 121363 - 121363

Published: March 9, 2025

Language: Английский

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Comparative evaluation of the impacts of different microplastics on greenhouse gas emissions, microbial community structure, and ecosystem multifunctionality in paddy soil

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 480, P. 135958 - 135958

Published: Sept. 25, 2024

Language: Английский

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Tracking the Changes of DOM Composition, Transformation, and Cycling Mechanism Triggered by the Priming Effect: Insights from Incubation Experiments

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

The priming effect (PE) is recognized as an important mechanism influencing organic matter transformation in aquatic systems. land-ocean continuum (LOAC) has received large quantities of dissolved (DOM) from various sources, which ideal interface for PE research. Here, we investigated the process by utilizing such a coastal environment to explore turnover DOM LOAC system. Suwannee River natural was selected background, and external environmental samples were introduced track changes carbon. together with variations compositions, structures characterized. Generally, river estuary environments exhibited positive PE, while offshore zone showed negative effect. Additionally, nutrients, salinity, composition all contributed PE. After incubation, feature carbon sources transferred terrestrial autochthonous. carbonyl alcohol functional groups significantly decomposed, methyl methylene increased heteroatoms further accelerated process. data also shows that special parameters molecular markers can be utilized response This research indicates change flux imbalance its budget systems could partially explained perspective

Language: Английский

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Unravelling Riverine Dissolved Organic Matter Sources Using Molecular Fingerprints and FEAST Model in A Multi-tributary Mountain River Basin

Water Research, Journal Year: 2025, Volume and Issue: 280, P. 123478 - 123478

Published: March 11, 2025

Language: Английский

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Seasonal Distribution of Nutrient Salts and Microbial Communities in the Pearl River Delta

Water, Journal Year: 2025, Volume and Issue: 17(6), P. 798 - 798

Published: March 10, 2025

The transformations of iron (Fe), phosphorus (P), and sulfide (S) have been previously investigated in many areas, but quantifying the effects seasons on nutrient bacterial community distributions is a major issue that requires urgent attention areas with serious anthropogenic disturbance. authors used diffusive gradients thin films (DGTs) technique 16S rRNA gene sequencing to determine spatial heterogeneity distribution structure overlying water sediment Pearl River Delta (PRD). Sampling campaigns were conducted summer winter. results show salts exhibited greater differences time than space there higher pollution levels winter summer. During summer, abundant non-point source from rainfall input provided rich substrate for bacteria water, leading strong competitiveness PAOs nitrifying bacteria. Meanwhile, high temperature was favorable exchange elements at SWI, release P, Fe, N, while, low temperatures DO seen winter, SOB denitrifying active, which correctly indicated concentration SO42− NH4+-N water. microbial diversity abundance also affected by season, richness communities salinity salt had significant inhibitory effect microorganisms. A Mantel test revealed spatiotemporal patterns dominant closely related TOC played an important role S, N cycle. These observations are understanding transformation diffusion Delta.

Language: Английский

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Dissolved organic matter mediates the interactions between bacterial community and heavy metal fractionation in contaminated coal mine soils

Ecotoxicology and Environmental Safety, Journal Year: 2025, Volume and Issue: 297, P. 118237 - 118237

Published: April 25, 2025

Language: Английский

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Spectroscopic Indices Reveal Spatiotemporal Variations of Dissolved Organic Matter in Subtropical Karst Cave Drip Water

Water, Journal Year: 2024, Volume and Issue: 16(17), P. 2438 - 2438

Published: Aug. 29, 2024

The migration and transformation of dissolved organic matter (DOM) in highly heterogeneous permeable karst aquifers are great significance to the regional carbon cycle but rarely explored, especially response extreme climate events. In this study, we utilized spectroscopic indices investigate variations DOM concentration, composition, origin Mahuang Cave, Southwest China, from August 2020 October 2022. findings indicate that meteorological conditions, hydrological pathways, in–situ metabolism primarily control dynamics cave drip water. However, due complex fractures stratigraphy, composition at four monitoring sites—classified into slow fast seepage—showed different responses Therefore, surface reworking must be fully considered when assessing environmental information recorded by sediments.

Language: Английский

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Transforming contaminant ligands at water–solid interfaces via trivalent metal coordination

Environment International, Journal Year: 2024, Volume and Issue: unknown, P. 109008 - 109008

Published: Sept. 1, 2024

Language: Английский

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Optical signatures as a diagnostic tool for tracking dynamics of sedimentary dissolved organic nitrogen, phosphorus, and sulfur in an anthropogenic bay

Chemical Geology, Journal Year: 2024, Volume and Issue: unknown, P. 122508 - 122508

Published: Nov. 1, 2024

Language: Английский

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