Exam #3 - Ecosystems & Human Impacts

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7 Terms

1
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Two laws underlying ecosystem function?

Energy flows one-way; nutrients cycle

2
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What is a trophic level?

Feeding position in an ecosystem.

3
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10% law?

About 10% of energy transfers to the next trophic level.

4
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What is eutrophication?

Nutrient runoff causes algal blooms and oxygen depletion.

5
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What is acid deposition?

Sulfur and nitrogen oxides form acids that damage ecosystems.

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How does the greenhouse effect work?

Greenhouse gases trap heat in Earth’s atmosphere.

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Why does CO₂ drive climate change?

Human activities release CO₂ faster than it can be absorbed.