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Phosphorus removal by aquatic vegetation in shallow eutrophic lakes: a laboratory study.
Wu, Dan; Shen, Chunqi; Cheng, Yu; Ding, Jue; Li, Wei.
Afiliação
  • Wu D; Jiangsu Provincial Academy of Environmental Science, Nanjing, China.
  • Shen C; Jiangsu Provincial Key Laboratory of Environmental Engineering, Nanjing, China.
  • Cheng Y; College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China. cshen@umces.edu.
  • Ding J; Key Laboratory of Integrated Regulation and Resources Development On Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, China.
  • Li W; Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing, China.
Environ Sci Pollut Res Int ; 30(6): 16166-16177, 2023 Feb.
Article em En | MEDLINE | ID: mdl-36178654
ABSTRACT
Eutrophication in inland lakes is occurring frequently with the rapid urbanization, the increases in human population, and the intensive agricultural activities. Traditional management programs focusing on external nutrient reduction failed in recovery of certain aquatic environments where internal nutrient releases are substantial. In this study, we evaluated the effects of aquatic vegetation in altering the phosphorus concentrations in a shallow, eutrophic lake through laboratory flume experiments. Our measurements demonstrated that aquatic vegetation could effectively lower the phosphorus levels in the water column, and the average reduction reached 90% for submerged vegetation and 80% for emergent vegetation. The experimental results showed that the submerged vegetation was effective to reduce phosphorus concentrations in the top and mid layers of pore waters and sediments. Differently, the emergent vegetation would assimilate more phosphorus in the bottom layer due to its deep root distributions. The flowing-water environment favored phosphorus removal for emergent vegetation, while the submerged vegetation was more functional in static waters according to our observations. The flux results showed that phosphorus transports from water columns to leaves, roots to leaves, and sediments to roots were all inhibited in flowing-water environments for submerged vegetation. Oppositely, the fluxes of emergent vegetation groups were all enhanced in flowing waters. Our experiments could inform ecosystem management concerning the potentials of aquatic vegetation in nutrient removal at regional and lake-wide scales.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Lagos / Ecossistema Limite: Humans País/Região como assunto: Asia Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Lagos / Ecossistema Limite: Humans País/Região como assunto: Asia Idioma: En Ano de publicação: 2023 Tipo de documento: Article