When populations at a given trophic level are controlled by populations in the trophic level above them, they are said to be under
A)top-down control.
B)indirect control.
C)bottom-up control.
D)functional control.

Question

Quizplus · Accepted Answer

When populations at a given trophic level are controlled by populations in the trophic level above them, it is known as top-down control. This type of control occurs when predators control the population of herbivores, which in turn control the population of plants. This control has a powerful effect on ecosystems, as it can determine the abundance and diversity of populations at all levels of the food chain.

When Populations at a Given Trophic Level Are Controlled by Populations