Biodiversity and Changes in Ecosystems

Maintaining ________ is important to keep an ecosystem healthy.

• pollutants

• biodiversity

• sunlight

• interactions

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______ are organisms that can be used as warning signals for changes in an ecosystem.

• Sea stars

• Plants

• Bioindicators

• Animals

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_____are scientists who study human impacts on ecosystems.

• Chemists

• Botanists

• Virologists

• Conservation biologists

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________ species are important to ecosystems and many ecosystems would collapse without them.

• Keystone

• Extinct

• Wild

• Living

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What term describes a community of interacting organisms and their environment?

• Resource

• Ecosystem

• Population

• Native

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________ are a keystone species found in tide pools.

• Wolves

• Plants

• Sea stars

• Animals

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An organism is ______ when there are no more left on Earth.

• alive

• endangered

• extinct

• living

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_______ are protected lands in the United States that preserve ecosystem and biodiversity.

• Farms

• National parks

• Oceans

• Great Lakes

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In general, as you move from the equator to the poles, what happens to biodiversity>

• Increases

• Decreases

• Remains the same

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Why is biodiversity in an ecosystem so important?

• Because it can help humans where to determine good places to develop farm land.

• Because places that have a healthy biodiversity are unaffected by major disturbances.

• Because having a high biodiversity allows ecosystems to withstand major changes.

• Because having a high biodiversity allows for fewer opportunities of competition for similar resources.

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