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<p>Ocean warming is increasing the frequency, extent, and severity of tropical-coral bleaching and mortality. During 2014–2017, marine heatwaves caused the Third Global Coral Bleaching Event. We analyze data from 15,066 reef surveys globally during 2014–2017. Across all surveyed reefs, 80% and 35% experienced moderate or greater (affecting &gt;10% of corals) bleaching and mortality, respectively. We assess the global extent of coral bleaching and mortality by applying bleaching response curves calibrated from surveyed reefs to predict bleaching globally, based on comprehensive remote-sensing of heat stress. These models predict that 51% and 15% of the world’s coral reefs suffered moderate or greater bleaching and mortality, respectively, during one or multiple years, surpassing damage from any prior global coral bleaching event. Our findings demonstrate that the impacts of ocean warming on coral reefs are accelerating, with the near certainty that ongoing warming will cause large-scale, possibly irreversible, degradation of these essential ecosystems. With heat stress levels during this event surpassing those observed previously, the National Oceanic and Atmospheric Administration developed more extreme Bleaching Alert levels that are now being used during the ongoing Fourth Global Coral Bleaching Event.</p>

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Severe and widespread coral reef damage during the 2014-2017 Global Coral Bleaching Event

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月10日

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  • C. Mark Eakin,
  • Scott F. Heron,
  • Sean R. Connolly,
  • Denise A. Devotta,
  • Gang Liu,
  • Erick F. Geiger,
  • Jacqueline L. De La Cour,
  • Andrea M. Gomez,
  • William J. Skirving,
  • Andrew H. Baird,
  • Neal E. Cantin,
  • Courtney S. Couch,
  • Simon D. Donner,
  • James Gilmour,
  • Manuel Gonzalez-Rivero,
  • Mishal Gudka,
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  • Gregor Hodgson,
  • Ove Hoegh-Guldberg,
  • Andrew S. Hoey,
  • Mia O. Hoogenboom,
  • Terry P. Hughes,
  • Meaghan E. Johnson,
  • James T. Kerry,
  • Tadashi Kimura,
  • Jennifer Mihaly,
  • Aarón Israel Muñiz-Castillo,
  • David O. Obura,
  • Morgan S. Pratchett,
  • Andrea Rivera-Sosa,
  • Claire L. Ross,
  • Jennifer Stein,
  • Angus Thompson,
  • Gergely Torda,
  • T. Shay Viehman,
  • Cory S. Walter,
  • Shaun Wilson,
  • Benjamin L. Marsh,
  • Blake L. Spady,
  • Noel Dyer,
  • Thomas C. Adam,
  • Pedro Alcolado,
  • Mahsa Alidoostsalimi,
  • Parisa Alidoostsalimi,
  • Lorenzo Alvarez-Filip,
  • Mariana Álvarez-Noriega,
  • Jesús Ernesto Arias-González,
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  • Ian Drysdale,
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  • Linda Eggertsen,
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  • Antoine Gilbert,
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  • Tom Heintz,
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  • Jean-Paul A. Hobbs,
  • Whitney C. Hoot,
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  • Lyza Johnston,
  • Michelle A. Johnston,
  • Hajime Kayanne,
  • Emma V. Kennedy,
  • Ruy Kenji Papa de Kikuchi,
  • Ulrike Kloiber,
  • Haruko Koike,
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  • Diego Lirman,
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  • Jennie Mallela,
  • Sangeeta Mangubhai,
  • Isabel Marques da Silva,
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  • Melanie McField,
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  • Marilia D. M. Oliveira,
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  • Stephanie Schopmeyer,
  • George Shedrawi,
  • Mohammad Reza Shokri,
  • Jennifer E. Smith,
  • Kylie Smith,
  • Struan R. Smith,
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  • Brigitte Sommer,
  • Melina Soto,
  • Richard Suckoo,
  • Helen Sykes,
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  • Marianne Teoh,
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  • Tai Chong Toh,
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  • Ali M. Ussi,
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摘要

Ocean warming is increasing the frequency, extent, and severity of tropical-coral bleaching and mortality. During 2014–2017, marine heatwaves caused the Third Global Coral Bleaching Event. We analyze data from 15,066 reef surveys globally during 2014–2017. Across all surveyed reefs, 80% and 35% experienced moderate or greater (affecting >10% of corals) bleaching and mortality, respectively. We assess the global extent of coral bleaching and mortality by applying bleaching response curves calibrated from surveyed reefs to predict bleaching globally, based on comprehensive remote-sensing of heat stress. These models predict that 51% and 15% of the world’s coral reefs suffered moderate or greater bleaching and mortality, respectively, during one or multiple years, surpassing damage from any prior global coral bleaching event. Our findings demonstrate that the impacts of ocean warming on coral reefs are accelerating, with the near certainty that ongoing warming will cause large-scale, possibly irreversible, degradation of these essential ecosystems. With heat stress levels during this event surpassing those observed previously, the National Oceanic and Atmospheric Administration developed more extreme Bleaching Alert levels that are now being used during the ongoing Fourth Global Coral Bleaching Event.