The keystone species is usually a top predator in its habitat. Which explanation below best describes how an ecosystem would respond if the keystone species is removed?

A. No animals would survive the keystone species removal.
B. The biodiversity would remain unchanged.
C. Biodiversity increases.
D. Biodiversity decreases.

The removal of a keystone species, typically a top predator, generally decreases biodiversity in an ecosystem. This can lead to overpopulation of certain species and the decline of others, ultimately disrupting the balance of the whole ecosystem. Hence, organisms dependent on the plants and animals affected may also struggle to survive.

Explanation:

Understanding Keystone Species

A keystone species is an organism that plays a crucial role in maintaining the structure of an ecological community. Typically, when a keystone species, often a top predator, is removed from an ecosystem, it can lead to significant changes. The most common outcome is a decrease in biodiversity, meaning more species are likely to suffer from extinction or reduced populations due to the disruption of the food web.

Ecosystem Responses

Without the keystone species, prey populations may explode since there are fewer predators to control them. This can lead to the overconsumption of vegetation, which in turn affects other species that rely on those plants for survival. Thus, the overall biodiversity of the ecosystem typically decreases.

If a top predator like wolves is removed from an ecosystem, deer populations may skyrocket, leading to overgrazing.
This overgrazing can devastate plant life, affecting other organisms that depend on those plants.
Ultimately, the ecosystem becomes less stable and diverse.

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