Coral Reefs and Ocean Acidification Review Questions

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What is coral bleaching?

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Coral bleaching is the expulsion of algae from coral tissues, turning them white, and it can lead to the death of corals and loss of marine biodiversity.

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What is the typical pH range of seawater?

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The typical pH of seawater is between 7.8 and 8.3.

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What percentage of the world's coral reefs are at risk from climate change?

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Over 90% of the world's coral reefs are at risk from climate change.

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What is a radula?

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A radula is a tooth-like structure used in feeding by certain marine organisms.

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How does ocean warming affect marine ecosystems?

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Ocean warming reduces oxygen levels and causes species to migrate to cooler waters.

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What are the main causes of coral bleaching?

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The main causes of coral bleaching include increased water temperature, pollution, and ocean acidification.

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What is ocean acidification?

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Ocean acidification is the decrease in pH of ocean water due to the absorption of excess atmospheric CO2.

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How does ocean acidification affect coral reefs?

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Ocean acidification weakens coral skeletons, making them more susceptible to damage and reducing their growth.

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What role do zooxanthellae play in coral health?

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Zooxanthellae are symbiotic algae that provide corals with energy through photosynthesis and contribute to their color.

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What is the significance of coral reefs in marine ecosystems?

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Coral reefs provide habitat for a diverse range of marine species, protect coastlines, and support fisheries.