Which of the following defines a trophic cascade?
A) A trophic cascade occurs when populations of predators and prey are disturbed by some abiotic event.
B) A trophic cascade occurs when a primary succession unfolds.
C) A trophic cascade is a process whereby abundances of a predator are reduced, and as a result, the prey's own resources increase in abundance.
D) A trophic cascade is a process whereby predators reduce abundances of their prey, and as a result, abundances of the prey's own resources increase.

Question

Quizplus · Accepted Answer

A trophic cascade is a process whereby predators reduce abundances of their prey, and as a result, abundances of the prey's own resources increase. This can then have cascading effects on lower trophic levels, leading to changes in community structure and ecosystem functioning. Choice A is incorrect because trophic cascades do not necessarily require abiotic disturbances. Choice B is incorrect because trophic cascades do not involve primary succession. Choice C is incorrect because it describes the opposite of what actually happens in a trophic cascade.

Which of the Following Defines a Trophic Cascade