In most of the biogeochemical model the grazing pressure is constant over the year. If this can be applicable for tropical and temperate latitude, it does not apply for the Arctic. With the pulsed polar production, the fact that a mesozooplanktonic predator is present at the surface for only a couple of months leads to strong variations in the population dynamic. The figure 5B shows one of the trophic chain related to one of our metazoan functional species found among the trophic web of the model (figure 4). By comparing figure 5A and B we can see that the diapause trait enables the metazoan to survive. When this metazoan functional species exits diapause, it will have a top-down control over its zooplankton functional species. This will have a cascading effect and allow the phytoplankton prey of that zooplankton species to have a proper fall bloom that was otherwise damped by its grazing pressure. Then, when the metazoan functional species goes back into diapause, its top-down control will cease which allows its prey biomass to have a small increase. But ultimately, being an arctic system, it is still bottom-up driven by the environment \cite{Tremblay_2015} and the whole system biomass decreases due to the entry into the winter season and the depletion of light.