APES Unit 2 Review

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What is a keystone species?

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A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance. Its presence is crucial for maintaining the structure of an ecological community.

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

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Why does secondary succession occur more quickly than primary succession?

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Secondary succession occurs more quickly because it takes place in areas that already have soil and nutrients, whereas primary succession occurs in areas that lack soil.

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What is species diversity?

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Species diversity refers to the variety of different species within a given ecological community, reflecting the differences between plants, animals, and other organisms.

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NGSS.MS-LS2-5

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What are ecosystem services?

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Ecosystem services are the benefits that humans derive from ecosystems, such as the consumption of mosquitoes by bats and the control of flooding by tropical forests.

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NGSS.MS-LS2-3

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What is the theory of island biogeography?

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The theory of island biogeography explains how the size and distance of an island from a mainland affect the number of species that can inhabit it.

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What is primary succession?

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Primary succession is the process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption or glacier retreat.

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NGSS.MS-LS2-3

Front

What is secondary succession?

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Secondary succession is the process of ecological change that occurs in an area where soil and some organisms still exist, such as after a forest fire or flood.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

Front

What factors influence species richness on islands?

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Species richness on islands is influenced by island size, distance from the mainland, and the availability of ecological niches.

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What is ecological equilibrium?

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Ecological equilibrium is a state of balance in an ecosystem where species populations remain relatively stable over time.

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NGSS.MS-LS2-3

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What is adaptive radiation?

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Adaptive radiation is the process by which a single ancestral species rapidly diversifies into a wide variety of forms to adapt to different environments.

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NGSS.MS-LS4-2

NGSS.MS-LS4-4