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Title
The 2014-17 global coral bleaching event: The most severe and widespread coral reef destruction
Author(s)
Eakin, C. Mark; Devotta, Denise; Heron, Scott; ...; Patankar, Vardhan; et al.
Published
Preprint
Publisher
Research Square
Published Version DOI
https://doi.org/10.21203/rs.3.rs-1555992/v1
Abstract
Ocean warming is increasing the incidence, scale, and severity of global-scale coral bleaching and mortality, culminating in the third global coral bleaching event that occurred during record marine heatwaves of 2014-2017. While local effects of these events have been widely reported, the global implications remain unknown. Analysis of 15,066 reef surveys during 2014-2017 revealed that 80% of surveyed reefs experienced significant coral bleaching and 35% experienced significant coral mortality. The global extent of significant coral bleaching and mortality was assessed by extrapolating results from reef surveys using comprehensive remote-sensing data of regional heat stress. This model predicted that 51% of the world’s coral reefs suffered significant bleaching and 15% significant mortality, surpassing damage from any prior global bleaching event. These observations demonstrate that global warming’s widespread damage to coral reefs is accelerating and underscores the threat anthropogenic climate change poses for the irreversible transformation of these essential ecosystems.
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PUB35592