Microbial Networks in Subsurface Sediment Porewater: Key Drivers for Organic Matter Degradation and Groundwater Chemistry Evolution

ACS ES&T Water, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Subsurface microbial communities are essential drivers in biogeochemical cycles, yet their sampling and characterization remain challenging. Specifically, assemblages sedimentary porewater have been largely overlooked existing research. In this study, we collected sufficient aquifer sediments for extraction analyses from four drilling sites an characterized by active activity, organic-rich deposits, elevated levels of geogenic ammonium. Distinct were identified bound porewater, free groundwater, with lactate/acetate, nitrite, Fe(II), respectively, emerging as the dominant intermediates. Nitrogen metabolism pathways evolved fermentation to denitrification culminating various ammonium-producing processes groundwater. Network analysis highlighted three metabolic modules: energy supply center delivering organic acids, a chemolithotrophic hub consuming nitrate, groundwater resource convergence center. iron reduction ammonium production mediated nodes Geobacteraceae Erysipelothrix, which exhibited highest network stress (2082) shortest average path length (1.32). These findings emphasize critical role microbiomes matter degradation environment evolution, calling further studies on sediment–groundwater interface across diverse aquatic ecosystems.

Language: Английский

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Multi-Phase mobilization and degradation pathway of natural organic matter within alluvial-lacustrine aquifer sediments

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133310 - 133310

Published: April 1, 2025

Language: Английский

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Constraints on vertical variability of geogenic ammonium in multi-layered aquifer systems

Water Research, Journal Year: 2024, Volume and Issue: 268, P. 122639 - 122639

Published: Oct. 16, 2024

Language: Английский

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洪湖湿地-地下水系统中氮来源与转化过程的水化学和多同位素解析

Earth Science-Journal of China University of Geosciences, Journal Year: 2024, Volume and Issue: 49(11), P. 3946 - 3946

Published: Jan. 1, 2024

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