How Do Oysters Affect Coral Reefs? Positive and Negative Impacts

Positive

• Water filtration improves clarity/quality for corals.
• Oyster reefs provide habitat for fish/crustaceans, boosting biodiversity.
• Reefs buffer wave energy, reducing coral erosion.

Negative

• Competition for space and resources.
• Over-filtration may reduce planktonic food for corals.
• Potential release of harmful metabolites.

Net impact depends on species, density, location, and environmental context.