Effects of nutrients on Microcystis growth more easily forming bloom
  • 【DOI】

    10.3321/j.issn:1001-0742.2004.06.012

  • 【摘要】

    Different nutrient media experimentally were N, P and Fe-limited conditions and a serial of diluted BG11 media. The cell change of morphology and life history, cell number, cell color and cell area of... 展开>>Different nutrient media experimentally were N, P and Fe-limited conditions and a serial of diluted BG11 media. The cell change of morphology and life history, cell number, cell color and cell area of Microcystis were analyzed quantitatively. First, the effects of nitrogen, phosphorus and iron depletion were distinctively different. Phosphorus and iron depletion caused more special division cells, slowly growth increasing, the easier change of bigger cell area. Second, the nitrogen and iron depletion could make the color of alga from green to brown. Finally, according to the resource competition and Monod equation, Microcystis kinetics of phosphorus and iron were also examined. Ks and μmax of phosphorus absorption were 0.0352 μmol/L, 0.493 d-1 respectively; iron absorption: 0.00323 μmol/L, 0.483 d-1. In a word, some evidences of the Microcystis bloom privilege in certain nutrient conditions were indicated in the experiments. The privileges were determined as the reviving under the adverse circumstances through the special division, the various nitrogen resources, and the lower kinetics of phosphorus and iron than that of most of other algae. The conclusions provided the scientific basis for preventing and managing Microcystis bloom in freshwater. 收起<<

  • 【作者】

  • 【作者单位】

    Department of Environmental Science and Engineering

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2004年6期

  • 【关键词】

    Microcystis  diluted BG11 media  nitrogen,phosphorus  iron  depletion  dynamics