K for Phytoplankton
![Monod Growth Rate Curve for Zooplankton Grazing Phytoplankton](media/graphics/k_phytoplankton.jpg)
For zooplankton, the nutrient that they consume is phytoplankton. Thus, K (the half-saturation coefficient for Monod formulation uptake) operates the same for the phytoplankton consumed by zooplankton as it did for the nitrogen consumed by phytoplankton.