The decomposition of macrozoobenthos induces large releases of phosphorus from sediments.
Environ Pollut
; 283: 117104, 2021 Aug 15.
Article
em En
| MEDLINE
| ID: mdl-33872938
ABSTRACT
Lake eutrophication and algal blooms may result in the mortality of macrozoobenthos. However, it is still not clear how macrozoobenthos decomposition affect phosphorus (P) mobility in sediments. High-resolution dialysis (HR-Peeper) and the diffusive gradients in thin films (DGT) technique were used in this study to assess the dissolved organic matter (DOM), dissolved/DGT-labile iron (Fe), P, and sulfur (S(-II)) profiles at a millimeter resolution. The decomposition of Bellamya aeruginosa significantly increased the internal loading of sediments P. The Fe(III) and sulfate were reduced under anaerobic conditions and promoted P desorption from sediments. This was supported by the significant increase in DGT-labile S(-II) and dissolved/DGT-labile P, Fe(II) and the significant positive correlation between Fe and P on day 8. The simultaneous increase in DOM and soluble reactive phosphorus (SRP) and the significant positive relationship between these factors were observed during the decomposition of B. aeruginosa. This suggested that complexation of DOM with metals may promotes the release of P from sediments.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fósforo
/
Poluentes Químicos da Água
País/Região como assunto:
Asia
Idioma:
En
Revista:
Environ Pollut
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China