Effects of iron and phosphorus on Microcystis physiological reactions.
OBJECTIVE
To observe the effects of iron and phosphorus on Microcystis physiological reactions.


METHODS
The experimental conditions were chosen as the light dark cycles of 16 h 8 h, 12 h 12 h, and 8 h 16 h. The cell change of morphology and life history, cell number, cell color, and cell area of Microcystis were analyzed quantitatively. According to the resource competition and Monod equation, Microcystis kinetics of phosphorus and iron were also examined.


RESULTS
The longer light time caused more special cell division, slower growth rate, and easier change of bigger cell area. The color of alga was changed from green to brown. Ks and micromax of phosphorus absorption were 0.0352 mircomol x L(-l) and 0.493 d(-1), respectively. Those of iron absorption were 0.00323 micromol x L(-1) and 0.483 d(-1).


CONCLUSIONS
Microcystis bloom is more dominant than other algae.
Ou
Ming-Ming
MM
Department of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China. oumingming@sjtu.edu.cn
Wang
Yan
Y
Zhou
Bao-Xue
BX
Cai
Wei-Min
WM
D007501:Iron / Q000502:physiology*; D008027:Light; D046931:Microcystis / Q000378:metabolism*; D010758:Phosphorus / Q000502:physiology*
D010758:Phosphorus; D007501:Iron