Loss of coral reef growth capacity to track future increases in sea level

Chris T. Perry, Lorenzo Alvarez-Filip, Nicholas A.J. Graham, Peter J. Mumby, Shaun K. Wilson, Paul S. Kench, Derek P. Manzello, Kyle M. Morgan, Aimee B.A. Slangen, Damian P. Thomson, Fraser Januchowski-Hartley, Scott G. Smithers, Robert S. Steneck, Renee Carlton, Evan N. Edinger, Ian C. Enochs, Nuria Estrada-Saldívar, Michael D.E. Haywood, Graham Kolodziej, Gary N. MurphyEsmeralda Pérez-Cervantes, Adam Suchley, Lauren Valentino, Robert Boenish, Margaret Wilson, Chancey MacDonald

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Sea-level rise (SLR) is predicted to elevate water depths above coral reefs and to increase coastal wave exposure as ecological degradation limits vertical reef growth, but projections lack data on interactions between local rates of reef growth and sea level rise. Here we calculate the vertical growth potential of more than 200 tropical western Atlantic and Indian Ocean reefs, and compare these against recent and projected rates of SLR under different Representative Concentration Pathway (RCP) scenarios. Although many reefs retain accretion rates close to recent SLR trends, few will have the capacity to track SLR projections under RCP4.5 scenarios without sustained ecological recovery, and under RCP8.5 scenarios most reefs are predicted to experience mean water depth increases of more than 0.5 m by 2100. Coral cover strongly predicts reef capacity to track SLR, but threshold cover levels that will be necessary to prevent submergence are well above those observed on most reefs. Urgent action is thus needed to mitigate climate, sea-level and future ecological changes in order to limit the magnitude of future reef submergence.

Original languageEnglish
Pages (from-to)396-400
Number of pages5
JournalNature
Volume558
Issue number7710
DOIs
Publication statusPublished - 21 Jun 2018

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