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Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)
https://orcid.org/0000-0002-7290-2500
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.
Spring sediments’ phosphorus ability can have a large influence on the extent of overwinter algae recruitment in the algal-dominated zone.
Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)
https://orcid.org/0000-0002-7290-2500
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.
Spring sediments’ phosphorus ability can have a large influence on the extent of overwinter algae recruitment in the algal-dominated zone.
Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)
https://orcid.org/0000-0002-7290-2500
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.
Spring sediments’ phosphorus ability can have a large influence on the extent of overwinter algae recruitment in the algal-dominated zone.
Sediment Phosphorus Supply and Availability in the Algal-Dominated Zone of a Large Eutrophic Lake (Lake Taihu)
Yin, Hongbin (author) / Lv, Yaobin (author) / Sheng, Weijia (author) / Xu, Di (author) / Huang, Junjie (author) / Zhang, Wenyu (author)
ACS ES&T Water ; 4 ; 2597-2607
2024-06-14
Article (Journal)
Electronic Resource
English