Unveiling Microbial Nitrogen Metabolism in Rivers using a Machine Learning Approach

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(15), P. 6605 - 6615

Published: April 3, 2024

Microbial nitrogen metabolism is a complicated and key process in mediating environmental pollution greenhouse gas emissions rivers. However, the interactive drivers of microbial rivers have not been identified. Here, we analyze patterns 105 China driven by 26 socioeconomic factors using an interpretable causal machine learning (ICML) framework. ICML better recognizes complex relationships between than traditional linear regression models. Furthermore, tipping points concentration windows were proposed to precisely regulate metabolism. For example, concentrations dissolved organic carbon (DOC) below 6.2 4.2 mg/L easily reduce bacterial denitrification nitrification, respectively. The for NO3–-N (15.9–18.0 mg/L) DOC (9.1–10.8 enabled highest abundance denitrifying bacteria on national scale. integration models field data clarifies important metabolism, supporting precise regulation river ecological management.

Language: Английский

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Internal nitrogen and phosphorus loading in a seasonally stratified reservoir: Implications for eutrophication management of deep-water ecosystems

Journal of Environmental Management, Journal Year: 2022, Volume and Issue: 319, P. 115681 - 115681

Published: July 8, 2022

Language: Английский

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Microplastics distribution characteristics in typical inflow rivers of Taihu lake: Linking to nitrous oxide emission and microbial analysis

Water Research, Journal Year: 2022, Volume and Issue: 225, P. 119117 - 119117

Published: Sept. 14, 2022

Language: Английский

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Destabilizing Effects of Environmental Stressors on Aquatic Communities and Interaction Networks across a Major River Basin

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(20), P. 7828 - 7839

Published: May 8, 2023

Human-driven environmental stressors are increasingly threatening species survival and diversity of river systems worldwide. However, it remains unclear how the affect stability changes across aquatic multiple communities. Here, we used DNA (eDNA) data sets from a human-dominated in China over 3 years analyzed communities under persistent anthropogenic stressors, including land use pollutants. First, found that significantly reduced multifaceted (e.g., richness, Shannon's diversity, Simpson's diversity) but increased synchrony Second, structures interaction networks inferred an empirical meta-food web were changed for example, resulting decreased network modularity negative/positive cohesion. Third, piecewise structural equation modeling proved stress-induced decline mainly depended upon diversity-mediated pathways rather than direct effects stress per se; specifically, increase main biotic drivers variation. Overall, our study highlights destabilizing on as well mechanistic dependencies, through reducing increasing synchrony, changing networks.

Language: Английский

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How nutrient loading leads to alternative stable states in microbially mediated N-cycle pathways: A new insight into bioavailable nitrogen removal in urban rivers

Water Research, Journal Year: 2023, Volume and Issue: 236, P. 119938 - 119938

Published: April 6, 2023

Language: Английский

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Strong Substance Exchange at Paddy Soil-Water Interface Promotes Nonphotochemical Formation of Reactive Oxygen Species in Overlying Water

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(17), P. 7403 - 7414

Published: April 17, 2024

Photochemically generated reactive oxygen species (ROS) are widespread on the earth's surface under sunlight irradiation. However, nonphotochemical ROS generation in water (e.g., paddy overlying water) has been largely neglected. This work elucidated drivers of and its spatial distribution undisturbed water, by combining imaging technology with situ monitoring. It was found that H2O2 concentrations formed three waters could reach 0.03–16.9 μM, profiles exhibited heterogeneity. The O2 planar-optode indicated redox interfaces were not always at soil–water interface but also possibly layer, depending soil properties. facilitated a rapid turnover reducing oxidizing substances, creating an ideal environment for ROS. Additionally, electron-donating capacities increased 4.5–8.4 times compared to top layers. Importantly, field investigation results confirmed sustainable •OH through pathways constituted significant proportion total daily production (>50%), suggesting comparable or even greater role than photochemical generation. In summary, process reported this study greatly enhances understanding natural processes soils.

Language: Английский

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Effects of cascade hydropower stations on hydrologic cycle in Xiying river basin, a runoff in Qilian mountain

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 646, P. 132342 - 132342

Published: Nov. 17, 2024

Language: Английский

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Hydrodynamics, Diagenesis and Hypoxia Variably Drive Benthic Oxygen Flux in a River‐Reservoir System

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(1)

Published: Jan. 1, 2024

Abstract Benthic oxygen flux with complex spatiotemporal variations is essential for the global budget of carbon dioxide and regional security water quality ecology, but its dominant driver under different circumstances has yet to be identified. In this study, a parametric scheme was proposed validated aquatic eddy correlation measurements then coupled diagenesis model environment model. The applied river‐reservoir significant environmental gradients in hydrodynamics, diagenesis, hypoxia, which are three factors that competitively drive variation benthic flux. results indicate hydrodynamics dominate riverine thalweg areas, lacustrine bank hypoxia shows dominance only hypolimnetic anoxic area. general, river‐reservoirs, followed by both more prominent than hypoxia. If operated reservoir experiences wet year, tends increase, while decreases. divers exhibit similar stable systems reservoirs, becomes exclusive fluxes systems.

Language: Английский

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An improved coupled water quantity–quality–ecology model incorporating diurnal cycle as a key factor affecting algal blooms and application in large rivers

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 376, P. 124497 - 124497

Published: Feb. 15, 2025

Language: Английский

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Novel insights in seasonal dynamics and co-existence patterns of phytoplankton and micro-eukaryotes in drinking water reservoir, Northwest China: DNA data and ecological model

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 857, P. 159160 - 159160

Published: Oct. 3, 2022

Language: Английский

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