Apentix/AP Biology/Unit 8: Ecology/Question
AP Biologymediummcq1 pt

A keystone species, the sea otter, is removed from a kelp forest ecosystem due to disease. Without the otters, the population of sea urchins, their primary prey, explodes and consumes the base of the kelp, ultimately decimating the kelp forest. Which of the following best describes the role of the sea otter in this ecosystem?

Explanation

Core Concept

A keystone species is an organism that helps define an entire ecosystem; its absence leads to a drastic shift in the community structure, often allowing a single species to dominate and reduce biodiversity.

Correct Answer

q4_c

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