Impact of submerged vegetation, water flow field and season changes on sediment phosphorus distribution in a typical subtropical shallow urban lake: Water nutrients state determines its retention and release mechanism

Bai, Guoliang; Xu, Dong; Zou, Yilingyun; Liu, Yunli; Liu, Zisen; Luo, Feng; Wang, Chuan; Zhang, Cong; Liu, Biyun; Zhou, Qiaohong; He, Feng; Wu, Zhenbin; Zhang, Yi

doi:10.1016/j.jece.2022.107982

Cited by 6 publications

(5 citation statements)

References 55 publications

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“…When compared to sediments lacking vegetation growth, constructed wetland sediments exhibit significantly elevated levels of OM, N, and P. This increase is primarily attributed to the substantial input of plant litter (Figure 3). Moreover, submerged plants, along with their extensive root systems, attenuate the flow velocity of adjacent water, facilitating the deposition of OM, N, P, and other substances transported by fine suspended particles (Bai et al., 2022). Consequently, influenced by multiple factors, the surface sediments of constructed wetlands manifest higher concentrations of OM, N, P, and other elements compared to sediments in other locations.…”

Section: Discussionmentioning

confidence: 99%

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Li,

Liu,

Huang

et al. 2024

J of Env Quality

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The primary drivers of eutrophication in lakes following the reduction of external nutrient inputs are the release of N and P from sediments. Constructed wetlands play a pivotal role in ameliorating N, P, and other biogenic element levels. However, the presence of large vegetation in these wetlands also substantially contributes to nutrient accumulation in sediments, a phenomenon influenced by seasonal variations. In this study, a typical constructed wetland was selected as the research site. The research aimed to analyze the forms of N and P in sediments during both summer and winter. Simultaneously, a comprehensive pollution assessment and analysis were conducted within the study area. The findings indicate that elevated summer temperatures, together with the presence of wetland vegetation, promote the release of N through the nitrification process. Additionally, seasonal variations exert a significant impact on the distribution of P storage. Furthermore, the role of constructed wetlands in the absorption and release of N and P is primarily controlled by the influence of organic matter on nitrate‐nitrogen, nitrite‐nitrogen, and available phosphorus, and is also subject to seasonal fluctuations. In summary, under the comprehensive influence of constructed wetlands, vegetation types, and seasons, sediments within the lake generally exhibit a state of mild or moderate pollution. Therefore, targeted measures should be adopted to optimally adjust vegetation types, and human intervention is necessary, involving timely sediment harvesting during the summer to reduce N and P loads, and enhancing sediment adsorption and retention capacity for N and P during the winter.

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Section: Discussionmentioning

confidence: 99%

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Li,

Liu,

Huang

et al. 2024

J of Env Quality

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“…Significant efforts have also been made to explore the impacts of marine vegetation (e.g., seagrass, mangroves, salt marshes, kelp, and red algae) on the aquatic environment. Such studies have sought to better understand how marine vegetation regulates fluid flow patterns [5][6][7][8] and the transport of nutrients, pollutants, and sediments [9][10][11][12]. Using various tools and techniques, researchers have explored the complex interactions between marine vegetation and fluid flow, yielding insights into the ecological and environmental benefits afforded by such ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Bending Height of Flexible Marine Vegetation

Chau,

Jung,

Kim

et al. 2024

JMSE

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Marine vegetation is increasingly viewed as a living shoreline that protects coastal communities and ecosystems from the damaging effects of wave energy. Many studies have explored the potential of marine vegetation in terms of reducing wave height, but more work is needed. Here, we used particle image velocimetry, fluid–structure interaction simulation, and multiple regression analysis to estimate the bending behaviors of flexible marine vegetation in water flow, and we predicted the wave height reduction in the downstream vegetation meadow. We considered different vegetation types and water flow velocities, constructed a total of 64 cases, and derived a multiple regression equation that simply estimates the vegetation bending height with a tolerance of ~10%. When the bending height rather than the vegetation height was applied, wave height reduction was alleviated by 1.08–9.23%. Thus, flexible vegetation reduced wave height by up to ~10% less than rigid vegetation in our investigation range. This implies that the impact of bending behavior becomes more pronounced with a larger vegetation meadow. The relative % decrease in wave height reduction was greater for fully submerged vegetation compared to partially submerged vegetation.

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“…1 As researchers explore the multifaceted dimensions of this revered water body, a critical concern comes to the fore�the intricate dynamics of endogenous nutrient release from sediment deposits. 2 This phenomenon, commonly referred to as internal nutrient loading, exerts a profound influence on the ecological balance and water quality of aquatic systems. 3,4 Sedimentary nutrient release in freshwater lakes has become an issue of mounting concern due to its overarching impacts on aquatic ecosystems globally.…”

Section: Introductionmentioning

confidence: 99%

“…Hangzhou West Lake, an iconic freshwater ecosystem nestled in the heart of China, has captured the attention of scientists and environmentalists alike due to its cultural significance and ecological complexity . As researchers explore the multifaceted dimensions of this revered water body, a critical concern comes to the forethe intricate dynamics of endogenous nutrient release from sediment deposits . This phenomenon, commonly referred to as internal nutrient loading, exerts a profound influence on the ecological balance and water quality of aquatic systems. , …”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Variation and Dynamics of Endogenous Nutrient Fluxes from Sediments in Hangzhou West Lake

Yang,

Fang,

Feng

et al. 2023

ACS EST Water

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This study conducts a comprehensive investigation of the sediment dynamics of West Lake. The research finds intricate relationships between sediment nutrient release and various environmental factors. Sedimentological tests suggest that the concentrations of TN, TP, and NH 4 + -N in sediment are mainly influenced by the physicochemical properties of sediment and overlying water. Laboratory experiments uncover that a temperature increase of 2−3 °C can elevate phosphorus efflux from sediment by approximately 15%. The presence of submerged plants, mainly in areas with direct water diversion, is linked to a decrease in nutrient efflux from sediment at a rate of about 25%. Analysis of microbial communities in sediment samples indicates the dominance of Proteobacteria and Bacteroidetes, which are proposed to play a key role in degrading organic matter and nutrient recycling in sediment. The activity of these microorganisms is estimated to reduce the level of nutrient efflux from sediment by 18%. Principal component analysis further verifies the spatial heterogeneity among sampling sites, with the primary principal components explaining 68% of variations. These findings not only provide insights into biogeochemical processes in freshwater ecosystems but also underscore the importance of integrated management to ensure long-term sustainability of aquatic environments.

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Impact of submerged vegetation, water flow field and season changes on sediment phosphorus distribution in a typical subtropical shallow urban lake: Water nutrients state determines its retention and release mechanism

Cited by 6 publications

References 55 publications

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Analysis of the Bending Height of Flexible Marine Vegetation

Spatiotemporal Variation and Dynamics of Endogenous Nutrient Fluxes from Sediments in Hangzhou West Lake

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