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Chapter 16: Problem 2

Distinguish between a dominant and a keystone species.

Short Answer

Expert verified
Define the differences between a dominant species and a keystone species in an ecosystem.

Step by step solution

01

Define dominant species

A dominant species is a species that has a large population size or occupies a significant proportion of the habitat within an ecosystem. Dominant species are generally the most abundant and have a substantial influence on the overall structure and functioning of the ecosystem.
02

Define keystone species

A keystone species is a species that has a disproportionate effect on its environment relative to its abundance. Although they may not be the most abundant species in their ecosystem, keystone species play a crucial role in maintaining the ecosystem's structure, function, and biodiversity through their interactions with other organisms.
03

Compare dominant species to keystone species

While both dominant and keystone species have significant influence in an ecosystem, their roles are different. A dominant species affects the ecosystem through its sheer abundance, often outcompeting other species for resources and occupying a large portion of the habitat. In contrast, a keystone species has a much larger impact on its environment than would be expected based on its population size, due to the unique ecological role it plays. Their removal or addition to the ecosystem can lead to drastic changes in the structure and function of the ecosystem, affecting many other organisms within it.

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