Table 1.

Functional responses used in equation (2.1).

nutrient uptake by non-toxic species of phytoplankton	fN(N)	$\frac{N}{e_N+N}$
nutrient uptake by toxic species of phytoplankton	fT(N)	$\frac{N}{e_T+N}$
growth rate limitation due to light attenuation	g(PN, PT)	$\frac{a}{b+c{P}_N+c{P}_T}$
feeding rates of the zooplankton	h(PN, PT)	$\frac{1}{({\mu }^2+P_N^2+P_T^2)}$