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Coral reefs are critical for risk reduction & adaptation
Date:5/13/2014

ARLINGTON, Va Stronger storms, rising seas, and flooding are placing hundreds of millions people at risk around the world, and big part of the solution to decrease those risks is just off shore. A new study finds that coral reefs reduce the wave energy that would otherwise impact coastlines by 97 percent.

"Coral reefs serve as an effective first line of defense to incoming waves, storms and rising seas," said Dr. Michael Beck, lead marine scientist of The Nature Conservancy and a co-author of the study, "200 million people across more than 80 nations are at risk if coral reefs are not protected and restored."

Published today in the journal "Nature Communications," this study by an international team of researchers from the University of Bologna, The Nature Conservancy, U. S. Geological Survey, Stanford University and University of California Santa Cruz, provides the first global synthesis of the contributions of coral reefs to risk reduction and adaptation across the Atlantic, Pacific, and Indian Oceans.

"This study illustrates that the restoration and conservation of coral reefs is an important and cost effective solution to reduce risks from coastal hazards and climate change," said Dr. Filippo Ferrario, lead author from the University of Bologna.

Key results from the study:

  • Coral reefs provide substantial protection against natural hazards by reducing wave energy by an average of 97 percent (studies across all tropical oceans).
  • The reef crest, or shallowest part of the reef where the waves break first, dissipates 86 percent of wave energy on its own.
  • The median cost for building artificial breakwaters is USD $19,791 per meter, compared to $1,290 per meter for coral reef restoration projects.

"Coral reefs are wonderful natural features that, when healthy, can provide comparable wave reduction benefits to many artificial coastal defenses and adapt to sea-level rise" said Dr.
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Contact: Leslie Gordon
lgordon@usgs.gov
650-329-4006
United States Geological Survey
Source:Eurekalert

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