8.2. Model Formulation
151
The maximum growth rate for either species is dependent on the nutrient
conditions within the cells. Since dinoflagellates do not require Si, the maximum growth rate for dinoflagellates is dependent on the availability of N.
For diatoms, the model is formulated to account for limitation by both Si
and N. The result is a competition for N governed by the availability of Si.
The nutrients taken up by each phytoplankton cell are considered the nutrients within each cell or the cell quota . The growth rate of each phytoplankton group (Growth Nutrient) is based on the cell quota according to
Droop (967),
Growth Nutrient =Growth max Nutrient * O-Kq/Q),
(6)
where Growthmax Nutrient is the maximum growth rate , Kq is the subsistence quota for zero growth pe r cell and Q is the cell quota of the nutrient.
The calculation of changes in nutrient concentrations are carried out in
the modules of Figures 8.7 and 8.8.
REGEN N3
REGEN N1
REGEN N
TOTAL DIATOMS
TOTAL DINOFLAGELLATES
FIGURE 8.8
151
The maximum growth rate for either species is dependent on the nutrient
conditions within the cells. Since dinoflagellates do not require Si, the maximum growth rate for dinoflagellates is dependent on the availability of N.
For diatoms, the model is formulated to account for limitation by both Si
and N. The result is a competition for N governed by the availability of Si.
The nutrients taken up by each phytoplankton cell are considered the nutrients within each cell or the cell quota . The growth rate of each phytoplankton group (Growth Nutrient) is based on the cell quota according to
Droop (967),
Growth Nutrient =Growth max Nutrient * O-Kq/Q),
(6)
where Growthmax Nutrient is the maximum growth rate , Kq is the subsistence quota for zero growth pe r cell and Q is the cell quota of the nutrient.
The calculation of changes in nutrient concentrations are carried out in
the modules of Figures 8.7 and 8.8.
REGEN N3
REGEN N1
REGEN N
TOTAL DIATOMS
TOTAL DINOFLAGELLATES
FIGURE 8.8