Coral reefs reduce wave energy by 97% and protect millions
In short: A meta-analysis of global data found that coral reefs reduce wave energy by an average of 97%, offering substantial protection against coastal hazards. The study estimates that over 100 million people could benefit from reef preservation or face higher risks if reefs are degraded. Reefs can provide wave attenuation similar to artificial defenses like breakwaters, suggesting they are a cost-effective natural solution.
The study used a meta-analysis of existing data to assess the role of coral reefs in coastal hazard reduction. It found that reef crests alone dissipate 86% of wave energy, with reefs as a whole reducing energy by 97%.
The main limitation is that the findings are based on observational data, not controlled experiments, so causation cannot be definitively established.
Why it matters: Coral reefs are a natural and cost-effective defense against coastal hazards, offering protection to millions.
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Sources
- Source: Research: Ferrario et al. (2014). The effectiveness of coral reefs for coastal hazard risk reduction and adaptation. Nature Communications. · cc-by-nc-sa
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