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[D-1.2 Modeling of Element Matter Cycle by Marine Phytoplankton]

[Contact Person]

Masataka Watanabe
Division of Water and Soil Environment
National Institute for Environmental Studies
16-2 Onogawa, Tsukuba, Ibaraki 305 Japan
Tel +81-298-50-2338, Fax +81-298-56-4680
E-mail masawata@nies.go.jp

[Total Budget for FY1993-1995]

41,350,000 Yen (FY1995 13,824,000 Yen)

[Abstract]

　Ecological model of Emiliania huxleyi was developed and calibrated with experimental data using a large axenic culture tank (1m³ volume) in order to understand element matter cycle in the sea. The growth of E. huxleyi was controlled by quota model and nutrients uptake rates were described by Michaelis-Menten equation. The concentrations of the carbonate species was determine from the combination of pH and total carbonate. The model explained observed cell concentration, nutrient concentrations, total carbonate, pH and cell quota of nitrogen, phosphate and carbon.

[Key Words]

Photosynthesis, Calcification, Emiliania huxleyi, Carbon Cycle, Ecological Model