Keystone Algebra

What is the role of a keystone species in an ecosystem?

• They are the most abundant species in the ecosystem.

• They have a disproportionately large impact on their environment relative to their abundance.

• They are the largest predators in the ecosystem.

• They are the primary producers in the ecosystem.

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

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Which of the following is an example of a keystone species?

• Grass in a savanna

• Wolves in Yellowstone National Park

• Rabbits in a meadow

• Fish in a pond

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NGSS.MS-LS2-2

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How does the removal of a keystone species affect an ecosystem?

• It has little to no effect on the ecosystem.

• It can lead to significant changes in the ecosystem structure and biodiversity.

• It causes the ecosystem to become more stable.

• It only affects the population of the keystone species.

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NGSS.MS-LS2-2

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In a food web, what is the primary function of a keystone species?

• To provide energy to primary consumers

• To control the population of other species

• To decompose organic matter

• To produce oxygen through photosynthesis

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NGSS.MS-LS2-2

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NGSS.MS-LS2-5

Which of the following best describes the concept of a keystone species?

• A species that is the most numerous in an ecosystem

• A species that has a critical role in maintaining the structure of an ecological community

• A species that is at the top of the food chain

• A species that is the primary producer in an ecosystem

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is the impact of keystone species on biodiversity?

• They decrease biodiversity by outcompeting other species.

• They increase biodiversity by maintaining the balance of species in an ecosystem.

• They have no impact on biodiversity.

• They only affect the biodiversity of plant species.

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

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Which of the following is NOT a characteristic of a keystone species?

• They have a large impact on their environment.

• They are always the largest species in the ecosystem.

• Their removal can lead to significant changes in the ecosystem.

• They play a critical role in maintaining the structure of an ecological community.

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NGSS.HS-LS2-6

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How do keystone species contribute to the stability of an ecosystem?

• By being the most abundant species

• By regulating the populations of other species

• By being the primary producers

• By decomposing organic matter

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NGSS.MS-LS2-2

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What happens to an ecosystem if a keystone species is introduced?

• The ecosystem becomes more diverse and stable.

• The ecosystem may experience a shift in species composition and interactions.

• The ecosystem remains unchanged.

• The ecosystem becomes less diverse.

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

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Which of the following is a potential consequence of losing a keystone species?

• Increased stability of the ecosystem

• Decreased biodiversity and altered ecosystem structure

• No change in the ecosystem

• Increased number of keystone species

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NGSS.MS-LS2-4

NGSS.MS-LS2-5