7.2 Biodiversity Loss and Extinction

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What does the living planet index track?

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It tracks all species' population trends globally.

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How long ago did dinosaurs become extinct?

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Approximately 65 million years ago.

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What is background extinction?

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It is the extinction of a species one by one, not a sudden loss of many species.

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What classification of risk indicates a species is at serious risk of extinction?

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Endangered.

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What are the greatest problems facing plants, animals, and people?

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All of the above.

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What is biodiversity?

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Biodiversity refers to the variety of life in a particular habitat or ecosystem.

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What are the main causes of biodiversity loss?

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Habitat destruction, climate change, pollution, overexploitation, and invasive species.

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What is the difference between endangered and extinct species?

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Endangered species are at serious risk of extinction, while extinct species no longer exist.

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What role do conservation efforts play in biodiversity?

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Conservation efforts aim to protect and restore biodiversity and prevent species extinction.

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What is an example of a species that has been brought back from the brink of extinction?

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The California condor is an example of a species that has been successfully reintroduced.