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Degradation Characteristics of Phosphorus in Phytoplankton-Derived Particulate Organic Matter and Its Effects on the Growth of Phosphorus-Deficient Microcystis aeruginosa in Lake Taihu

Author

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  • Ming Kong

    (Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, No. 8 Jiang Wang Miao Street, Nanjing 210042, China)

  • Jianying Chao

    (Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, No. 8 Jiang Wang Miao Street, Nanjing 210042, China)

  • Wei Han

    (Sino-Japan friendship Center for Environmental Protection, Beijing 100029, China)

  • Chun Ye

    (Chinese Research Academy of Environmental Sciences, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Beijing 100012, China)

  • Chun-Hua Li

    (Chinese Research Academy of Environmental Sciences, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Beijing 100012, China)

  • Wei Tian

    (Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, No. 8 Jiang Wang Miao Street, Nanjing 210042, China)

Abstract

To illustrate the contribution of phytoplankton-derived particulate organic matter (PPOM) to endogenous phosphorus (P) cycling and its effects on cyanobacteria blooms, PPOM characteristics, the degradation mechanism, and the growth of P-deficient Microcystis aeruginosa were studied in Lake Taihu. Results showed that PPOM is the most important P pool in the water column during cyanobacteria bloom, accounting for more than 80% of the total P (TP) in the water. During PPOM degradation, the particulate orthophosphate (Ortho-P) is the main species of P release from PPOM in the early degradation stage. The variations of polyphosphate (Poly-P) and phosphodiesters (Diester-P) contents were most significant, which were degraded completely within four days and eight days. Cell density and growth rate of M. aeruginosa using PPOM as P source were similar to those growing on Na 2 HPO 4 . The above results show that P in PPOM can be converted into available P by degradation, thus promoting the growth of M. aeruginosa . Therefore, the contribution of P release from PPOM degradation needs to be paid attention to in lake eutrophication control in the future.

Suggested Citation

  • Ming Kong & Jianying Chao & Wei Han & Chun Ye & Chun-Hua Li & Wei Tian, 2019. "Degradation Characteristics of Phosphorus in Phytoplankton-Derived Particulate Organic Matter and Its Effects on the Growth of Phosphorus-Deficient Microcystis aeruginosa in Lake Taihu," IJERPH, MDPI, vol. 16(12), pages 1-13, June.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:12:p:2155-:d:240854
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    References listed on IDEAS

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    1. Ming Kong & Jianying Chao & Wei Zhuang & Peifang Wang & Chao Wang & Jun Hou & Zhaoshi Wu & Longmian Wang & Guang Gao & Yu Wang, 2018. "Spatial and Temporal Distribution of Particulate Phosphorus and Their Correlation with Environmental Factors in a Shallow Eutrophic Chinese Lake (Lake Taihu)," IJERPH, MDPI, vol. 15(11), pages 1-12, October.
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    Cited by:

    1. Soon-Jin Hwang, 2020. "Eutrophication and the Ecological Health Risk," IJERPH, MDPI, vol. 17(17), pages 1-6, August.

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