Spatial and Temporal Variability in the Bottom Sediment Characteristics of a Shallow Lake under Backwater Separation and Application of Effective Microorganisms

Sustainability, Journal Year: 2024, Volume and Issue: 16(19), P. 8650 - 8650

Published: Oct. 6, 2024

Lake Konin is a small and shallow lake under the influence of highly eutrophic riverine waters. Feeding as backwater during high water level periods, River Obra had exerted decisive impact on quality, thus new dike with closing device was created. Protective measures were followed by application Effective Microorganisms (EM), aiming at reduction in nutrient concentrations CyanoHABs. Positive changes ecosystem initiated (increased phytoplankton diversity), but cyanobacteria blooms still present due to content. Some observed sediments (phosphorus (P) its fractions, P pore waters, organic matter experimental assessment internal loading) studied before treatment. A slight increase content noted, result an Res-P fraction. Simultaneously, decrease most mobile fractions observed. Summer load reduced from 5.4 kgP d−1 treatment less than 1 first year, increased again second year 4.5 d−1. Similarly positive induced sediments; nevertheless, they acted important source nutrients for primary producers. Additional restoration methods shall be considered, combined treatments used simultaneously are reported effective quality improvement.

Language: Английский

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Study on Phosphorus Variability Characteristics and Response Mechanism of Microbial Community during Sediment Resuspension Process

Separations, Journal Year: 2024, Volume and Issue: 11(10), P. 297 - 297

Published: Oct. 14, 2024

Submerged plants and related disturbances can affect both the phosphorus (P) release microbial communities in sediments. In this study, a sediment resuspension system was constructed, P variability characteristics influenced by Vallisneria natans (V. natans) response mechanism of community were studied. The results indicated that total (TP) content increased from 678.875 to 1019.133 mg/kg 1126.017 1280.679 sediments suspended solids (SSs) during process, respectively. Organic (OP) 127.344 302.448 SSs after disturbance, leaves V. had higher Chao values while Shannon decreased disturbance compared control SSs. Proteobacteria highest abundance with value 51.1% SSs, rhizomes could reach 73.2% on average. Chloroflexi, Acidobacteria, Firmicutes also main phyla system. Sodium hydroxide extractable (NaOH-P) reduce bioavailability fraction under conditions. decrease Bacteroidetes Nitrospirae they more sensitive rotational speed changed survival conditions for Nitrospirae. process reflect influence changing provide theoretical foundation at micro level.

Language: Английский

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Effects of the combined use of lanthanum carbonate and activated carbon capping materials on phosphorus and dissolved organic matter in lake sediments

Environmental Research, Journal Year: 2024, Volume and Issue: 264, P. 120291 - 120291

Published: Nov. 4, 2024

Language: Английский

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Promoting effect of submerged plants on phosphorus source and sink in sediments: Response of phosphorus release and microbial community to Vallisneria natans and Potamogeton malaianus growth

Environmental Technology & Innovation, Journal Year: 2024, Volume and Issue: 36, P. 103899 - 103899

Published: Nov. 1, 2024

Language: Английский

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From Winter Dormancy to Spring Bloom: Regulatory Mechanisms in Microcystis aeruginosa Post-Overwintering Recovery

Water Research, Journal Year: 2024, Volume and Issue: 269, P. 122807 - 122807

Published: Nov. 17, 2024

Language: Английский

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