Final answer:
To determine the number of phytoplankton needed to produce zooplankton contamination levels, we consider the process of biomagnification where certain substances increase in concentration as they move up the food chain. The specific number of phytoplankton required depends on factors like the type and concentration of contaminants, and the size and feeding habits of zooplankton.
Step-by-step explanation:
To determine how many phytoplankton must be consumed to produce the contamination level of zooplankton, we need to consider the process of biomagnification. Biomagnification refers to the increase in concentration of certain substances, such as polychlorinated biphenyls (PCBs) and heavy metals, as they move up the food chain. Phytoplankton, as primary producers, can contain low concentrations of these substances, while zooplankton, as consumers, can accumulate higher levels. The specific number of phytoplankton needed to produce contamination levels in zooplankton will depend on various factors such as the type and concentration of contaminants, as well as the size and feeding habits of the zooplankton.