Changes of riparian soil-plant system phosphorus responding to hydrological alternations of Three Gorges Reservoir

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 15, 2025

The anti-seasonal hydrological alternation in the Three Gorges Reservoir (TGR) significantly impacts release of phosphorus (P) from riparian soil-plant system, posing a threat to aquatic environment. To investigate this issue, soils and plants three tributaries central TGR were sampled at distinct stages: early exposure, final soon after inundation receded. Soil properties, P forms, plant content analyzed. A significant decrease exchangeable organic during aluminum/iron-bound observed. These changes linked mineralization matter reduction iron oxides. Compared bioavailable inorganic P, contributed more total soil exposure-inundation cycle. Plant uptake accounted for 76.08% released by exposure. During inundation, exceeded release. Therefore, system could act as "sink" exposure "source" inundation. was primary driver "source-sink" transformation. mitigate zones, recycling materials establishing monitoring sites are recommended.

Language: Английский

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Understanding dissolved organic matters in stormwater from different urban land uses: implications for reuse safety

Frontiers of Environmental Science & Engineering, Journal Year: 2025, Volume and Issue: 19(4)

Published: Feb. 20, 2025

Language: Английский

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Performance of nitrogen-fixing bacteria and fungi by water-lifting aerator in drinking water reservoir: dynamics and co-existence patterns

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 106984 - 106984

Published: March 1, 2025

Language: Английский

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Role of hydraulic residence time in shaping phytoplankton community assembly in the upper yellow river cascade reservoirs

Frontiers in Environmental Science, Journal Year: 2025, Volume and Issue: 13

Published: April 9, 2025

Introduction: Cascade hydropower development significantly alters the structure and function of river ecosystems. Phytoplankton, as primary producers, are highly sensitive to environmental changes, their diversity community reflect state water environment. While there is extensive research on how changes in environments affect phytoplankton structure, studies spatial distribution patterns assembly mechanisms relation hydraulic residence time (HRT)—a key characteristic reservoirs—are limited. Methods: Linear regression analysis was used examine relationship between communities HRT. Additionally, Neutral Community Model (NCM) combined with Modified Stochasticity Ratio (MST) employed reveal types these cascade reservoirs. Finally, Mantel tests stepwise assessed specific impacts factors communities. Results: In ecosystem Yellow River reservoirs, HRT positively correlated abundance across different seasons. annual regulation stations (LJX LYX), species richness, abundance, indices higher compared those runoff stations. Discussion: The primarily driven by deterministic processes, station being more influenced processes than station. HRT, temperature (WT), total nitrogen (TN) most significant affecting structural differences There a positive correlation temperature, especially short where impacted temperature.

Language: Английский

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Differences in seasonal dynamics, ecological driving factors and assembly mechanisms of planktonic and periphytic algae in the highly urban Fenhe River

Ecological Processes, Journal Year: 2024, Volume and Issue: 13(1)

Published: Sept. 27, 2024

Abstract Background Algae play important roles in urban river ecosystems and are the cornerstones of most water quality monitoring programs. Thus, a better understanding algal community dynamics is needed to support sustainable management resources rivers. Results In this study, we quantified seasonal variations planktonic periphytic structure highly Fenhe River identified environmental factors affecting diversity. We monitored (drifting) (attached) communities Taiyuan section over one year. The results indicated that Cyanophyta was dominant phylum both communities, followed by Bacillariophyta Chlorophyta. Significant differences were observed composition communities. particular, more diverse than community. Water temperature pH main structure, respectively, while nutrients significant factor Ecological modeling mainly driven stochastic processes. A co-occurrence network developed for displayed positive interactions between algae. Conclusions These findings deepen our interaction algae driving River. They also provide theoretical basis managing protecting ecosystems.

Language: Английский

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Performance of gravity-driven membrane filtration for treatment of reservoir water with algal bloom

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131010 - 131010

Published: Dec. 1, 2024

Language: Английский

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