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Variation in Sediment Available-Phosphorus in Dianchi Lake and Its Impacts on Algal Growth

Author

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  • Yongchuan Chen

    (College of Biological and Agricultural Sciences, Honghe University, Mengzi 661100, China
    College of Resources and Environment, Yunan Agricultural University, Kunming 650201, China)

  • Qiao Chen

    (College of Resources and Environment, Yunan Agricultural University, Kunming 650201, China)

  • Degang Zhang

    (College of Biological and Agricultural Sciences, Honghe University, Mengzi 661100, China)

  • Li Tang

    (College of Resources and Environment, Yunan Agricultural University, Kunming 650201, China)

Abstract

Sediment phosphorus (P) is an active component of the P cycle in lakes and its availability and movement could play an important role in eutrophication. Sediments from different depths in five representative sites of Dianchi Lake China, i.e., Haigeng, Dounan, Luojiacun, Xinjie, and Kunyang, were studied from January to December to evaluate the spatial and temporal dynamics in available-P and soluble-P and their impacts on algal growth. The results showed that the average sediment available-P and soluble-P were 41.2 mg kg −1 and 0.27 mg kg −1 , respectively. Sediment available-P and soluble-P concentrations varied significantly among seasons, sites, and layers, with the following order: surface (0–5 cm) > middle (5–10 cm) > bottom (10–20 cm). The release and transformation characteristics of available-P and soluble-P at the sediment–water interface varied among sites. The Haigeng site, with the most severe algae blooms, had significantly higher average available-P and soluble-P in sediment than other sites. This indicated that phosphorus release and availability were associated with algal growth, and that the sediment surface (0–5 cm) is an important internal source that supports algal growth in Dianchi Lake.

Suggested Citation

  • Yongchuan Chen & Qiao Chen & Degang Zhang & Li Tang, 2022. "Variation in Sediment Available-Phosphorus in Dianchi Lake and Its Impacts on Algal Growth," IJERPH, MDPI, vol. 19(22), pages 1-14, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:22:p:14689-:d:967169
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    1. Christopher T. Reinhard & Noah J. Planavsky & Benjamin C. Gill & Kazumi Ozaki & Leslie J. Robbins & Timothy W. Lyons & Woodward W. Fischer & Chunjiang Wang & Devon B. Cole & Kurt O. Konhauser, 2017. "Evolution of the global phosphorus cycle," Nature, Nature, vol. 541(7637), pages 386-389, January.
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    1. Alvydas Zagorskis & Regimantas Dauknys & Mantas Pranskevičius & Olha Khliestova, 2023. "Research on Biogas Yield from Macroalgae with Inoculants at Different Organic Loading Rates in a Three-Stage Bioreactor," IJERPH, MDPI, vol. 20(2), pages 1-17, January.

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