What happens to the population size or each of the pond organisms when the perch population size is decreased? how many of the species in the food web are affected by a population change in a single species?

All of the species are effected and can go extinct or something

answer; i believe the correct answer is ( proteins );

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls