Freshwater Salinization Mitigated N₂O Emissions in Submerged Plant-Covered Systems: Insights from Attached Biofilms

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

Published: Jan. 23, 2025

Submerged plants (SMPs) play a critical role in improving water quality and reducing N2O greenhouse gas emissions. However, freshwater salinization represents major environmental challenge aquatic systems. To investigate the impact of on emissions, this study conducted indoor mesocosm experiments simulating SMP nonsubmerged plant (Non_SMP) areas lakes. The objective was to explore effects microbial mechanisms attached biofilm emission salinization. Salinization systems (700–1500 μS cm–1) reduced flux by 37.0 40.5% compared (<700 SMPs Non_SMPs, respectively. Kinetic showed that reduction emissions mainly attributed rather than sediment or water. net rates decreased 47.1 71.8% respectively, with Additionally, biofilms exhibited lower denitrification rates. Furthermore, production potential ((nirS + nirK)/(nosZI nosZII)), thereby further decreasing This provides valuable insights into mitigating salinized

Language: Английский

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Evolution and distribution of antibiotic resistance genes in submerged macrophytes and biofilm systems: From seasonal monitoring to mesocosm experiments

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 367, P. 121947 - 121947

Published: July 27, 2024

Language: Английский

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Comprehensive Analysis of Microplastic Abundance in Macrophytes, Macrophyte-Associated Sediments, and Water in Tropical Coastal Lagoons in Sri Lanka

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 157 - 157

Published: Jan. 9, 2025

The prevalence and fate of microplastics in macrophytes are insufficiently understood, data on the abundance microplastic (MP) accumulation macrophyte ecosystems urgently needed to fill this knowledge gap. main objectives study were quantify characterize that accumulate macrophytes, associated sediments, water Negombo Lagoon, Sri Lanka. investigation was conducted with specialized sampling extraction techniques. Microplastics detected by fluorescence tagging polymers using Nile red, polymer identification ATR-µFTIR ATR-FTIR. This revealed variations across different species. Gracilaria sp. had a higher 9 ± 3 items g−1 wet weight, followed Chaetomorpha at 8 weight Halodule pinifolia 6 1 weight. root surfaces these species slightly similar levels abundance. Both blue transparent predominant. Fragments (>47%) found percentage samples, but high fiber contents (>60%) sediment samples. Nevertheless, samples contained fragments size range 50–150 μm. comprehensive contributes expanding our awareness regarding influence pollution ecosystems.

Language: Английский

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High-resolution characterization of rhizosphere oxygen (O2) dynamics in different wetland plant species after light/dark transitions

Flora, Journal Year: 2025, Volume and Issue: unknown, P. 152674 - 152674

Published: Jan. 1, 2025

Language: Английский

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Co-dispersion of cellulose nanofibers and 3,3′,5,5′-tetramethylbenzidine in water: Different strategies for colorimetric probes

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 141771 - 141771

Published: March 1, 2025

Language: Английский

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Nitrogen removal performance and microbial community characteristics of a submerged macrophyte pond–constructed wetland composite system

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 72, P. 107492 - 107492

Published: March 20, 2025

Language: Английский

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Superoxide radical production and influencing factors in leaf biofilms of different submerged macrophytes: Field sampling experiments in a rural pond

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116573 - 116573

Published: April 1, 2025

Language: Английский

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Interactions between periphytic algal-bacterial biofilms and Mn(II) under the influence of suspended solids: Regulation of superoxide production and drivers of Mn(II) oxidation

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: 13(3), P. 116903 - 116903

Published: May 2, 2025

Language: Английский

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Microbial succession and enrichment of antibiotic resistance genes during algal-bacterial biofilm purification of aquaculture wastewater

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 64, P. 105642 - 105642

Published: June 15, 2024

Language: Английский

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Do Microorganisms in Bathing Water in Guadeloupe (French West Indies) Have Resistance Genes?

Antibiotics, Journal Year: 2024, Volume and Issue: 13(1), P. 87 - 87

Published: Jan. 16, 2024

Waterborne faecal contamination is a major public health concern. The main objectives of this study were to investigate and Escherichia coli (E. coli) antibiotic resistance in recreational fresh water from Guadeloupe characterise the microbiome resistome composition biofilms submerged rocks. Significant was observed at 14 freshwater sites. E. predominated (62%), followed by Enterobacter cloacae (11%) Acinetobacter spp. (11%). Of 152 isolated, none produced extended-spectrum beta-lactamases (ESBLs), but 7% showed streptomycin 4% tetracycline. Biofilm analysis revealed clinically significant antibiotic-resistance genes (ARGs), including those coding for sulfonamides (sul1), carbapenems (blaKPC), third-generation cephalosporins (blaCTX-M). Mobile genetic elements (MGEs) (intI1, intI2, intI3) linked aminoglycosides, beta-lactams, tetracycline, as well heavy metal determinants (copA, cusF, czcA, merA) conferring copper, silver, cadmium, mercury also detected. Diverse bacterial phyla found biofilm samples, which Proteobacteria, Bacteroidetes, Planctonomycetes, Cyanobacteria predominant. Despite frequent presence exceeding regulatory standards, low levels antibiotic-resistant bacteria ARGs MGEs associated suggest limited Guadeloupean waters.

Language: Английский

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