IB Biology SL B4.1.5 Coral Reef Formation Conditions Questions

Explore how warm, shallow, clear, sunlit, saline water with suitable pH supports zooxanthellae and reef-building corals in IB Biology SL B4.1.5.

Exam points

Identify warm, shallow, clear, sunlit, saline water with suitable pH as limiting conditions for coral-reef formation and zooxanthellae photosynthesis.
Use coral-cover or bleaching data to relate temperature anomalies and high-temperature thresholds to reef-building coral survival and formation.

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Reef-building corals are an association between two organisms: coral polyps and Zooxanthellae.

State one limiting factor on Zooxanthellae which affects coral reef formation.

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