Cable bacteria regulate sedimentary phosphorus release in freshwater sediments

Xu, Xiaoling; Weng, Nanyan; Zhang, Hanxiao; Velde, Sebastiaan van de; Hermans, Martijn; Wu, Fengchang; Huo, Shouliang

doi:10.1016/j.watres.2023.120218

Cited by 7 publications

(3 citation statements)

References 64 publications

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“…The reduction of iron-bound P (Fe–P) and the mineralization of organic phosphorus (Org-P) in sediment are the main reasons for the increase in the SRP concentration in lake water. The cable bacteria were thought to regulate the sedimentary iron-bound phosphorus release, and organic P can be decomposed by the alkaline phosphatase (APA) in freshwater sediments. , Phosphorus can be gradually released from mobile sediment P fractions into the solution under anoxic or microbial activity and is subsequently used by algae in the culture. The changes in alkaline phosphatase (APA) in different cultures during incubation were probably partly responsible for the increased P concentration in the solution (Figure b).…”

Section: Results and Discussionmentioning

confidence: 99%

Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)

Yin,

Lv,

Sheng

et al. 2024

ACS EST Water

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In this study, sediment internal phosphorus (P) and its supply ability were studied in the algal-dominated zone of Lake Taihu during the overwintering and recruitment period of algae. The results indicated that sediment P fluxes, P mobile fractions, and P supply kinetics showed dynamic changes from the overwinter to the algal recruitment period. P flux and the concentration of the diffusive gradient in thin film (DGT)-measured labile P increased from winter to summer. However, the highest P supply ability was found in spring sediments, as indicated by the ratios of DGT-P to porewater P, suggesting that spring sediments can supply more P for the growth of overwinter algae. Laboratory incubation experiments show that sediment with a higher mobile P content could release more soluble P under suitable conditions, thereby increasing the chlorophyll a (Chla) concentration. The growth of overwinter algae appeared to be more correlated with porewater P concentrations and the ratios of nitrogen to phosphorus than with the solid-phase mobile P fractions, as indicated by the Pearson correlation analysis. This study strengthens our understanding of the relationship between the availability of sediment P and algal recruitment from sediments.

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Section: Results and Discussionmentioning

confidence: 99%

Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)

Yin,

Lv,

Sheng

et al. 2024

ACS EST Water

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“…Sedimentary nutrient release in freshwater lakes has become an issue of mounting concern due to its overarching impacts on aquatic ecosystems globally. , Excessive nutrient fluxes from lake sediments, comprising primarily of nitrogen and phosphorus, have been empirically linked to a plethora of detrimental phenomena including toxic algal blooms, hypoxia, loss of biodiversity, and habitat degradation. − The cumulative impacts of internal nutrient loading can alter the ecology of freshwater bodies, threatening the survival of fish, aquatic plants, and other organisms while compromising water quality for human use. , Internal loading has been identified as a key factor exacerbating eutrophication in aquatic ecosystems . Even after substantial reductions in external nutrient loading, many eutrophic lakes demonstrate limited recovery due to extensive sediment nutrient stores that continue to diffuse into the overlying water, fueling algal growth .…”

Section: Introductionmentioning

confidence: 99%

“…3,4 Sedimentary nutrient release in freshwater lakes has become an issue of mounting concern due to its overarching impacts on aquatic ecosystems globally. 5,6 Excessive nutrient fluxes from lake sediments, comprising primarily of nitrogen and phosphorus, have been empirically linked to a plethora of detrimental phenomena including toxic algal blooms, hypoxia, loss of biodiversity, and habitat degradation. 7−10 The cumulative impacts of internal nutrient loading can alter the ecology of freshwater bodies, threatening the survival of fish, aquatic plants, and other organisms while compromising water quality for human use.…”

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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Seasonal distribution patterns of P-cycling-related microbes and its association with internal phosphorus release in the eutrophic Lake Chaohu, China

Sun,

Zhu,

Huang

et al. 2024

Journal of Environmental Sciences

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Cable bacteria regulate sedimentary phosphorus release in freshwater sediments

Cited by 7 publications

References 64 publications

Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)

Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)

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

Seasonal distribution patterns of P-cycling-related microbes and its association with internal phosphorus release in the eutrophic Lake Chaohu, China

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