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Effect of phosphorus stress on Microcystis aeruginosa growth and phosphorus uptake

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  • Sajeela Ghaffar
  • R Jan Stevenson
  • Zahiruddin Khan

Abstract

This study was designed to advance understanding of phosphorus regulation of Microcystis aeruginosa growth, phosphorus uptake and storage in changing phosphorus (P) conditions as would occur in lakes. We hypothesized that Microcystis growth and nutrient uptake would fit classic models by Monod, Droop, and Michaelis-Menten in these changing conditions. Microcystis grown in luxury nutrient concentrations was transferred to treatments with phosphorus concentrations ranging from 0–256 μg P∙L-1 and luxury nitrogen. Dissolved phosphorus concentration, cell phosphorus quota, P uptake rate and cell densities were measured at day 3 and 6. Results showed little relationship to predicted models. Microcystis growth was asymptotically related to P treatment from day 0–3, fitting Monod model well, but negatively related to P treatment and cell quota from day 3–6. From day 0–3, cell quota was negatively related to P treatments at

Suggested Citation

  • Sajeela Ghaffar & R Jan Stevenson & Zahiruddin Khan, 2017. "Effect of phosphorus stress on Microcystis aeruginosa growth and phosphorus uptake," PLOS ONE, Public Library of Science, vol. 12(3), pages 1-17, March.
    • Handle: RePEc:plo:pone00:0174349
    DOI: 10.1371/journal.pone.0174349
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    1. Wang, Hao & Garcia, Pablo Venegas & Ahmed, Shohel & Heggerud, Christopher M., 2022. "Mathematical comparison and empirical review of the Monod and Droop forms for resource-based population dynamics," Ecological Modelling, Elsevier, vol. 466(C).

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