Question

the food web below shows the feeding relationships among some of the organisms that live in lake ontario.
if the population of walleye in lake ontario decreased due to disease, which of these populations would also be most likely to increase?
a. diatoms
b. zooplankton
c. yellow perch
d. flagellates

Explanation:

In a food - web, if the population of a predator (Walleye) decreases, the population of its prey is likely to increase. Diagrams are not living organisms. Zooplankton are likely prey of other organisms higher up in the food - web and not directly related to Walleye in a simple predator - prey relationship here. Yellow perch are likely competitors or predators in some cases. Flagellates are likely to be at a lower trophic level and are likely prey of Walleye. With fewer Walleye to consume them, flagellate populations are most likely to increase.

Answer:

D. Flagellates