Heat-driven functional extinction of Caribbean Acropora corals from Florida's Coral Reef

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Abstract

In 2023, a record-setting marine heat wave triggered the ninth mass coral bleaching event on Florida’s Coral Reef (FCR). We examined spatial patterns of heat exposure along the ~560-kilometer length of FCR and the mortality of two ecologically important, critically endangered reef-building corals. Sea surface temperatures were ≥31°C for an average of 40.7 days, leading to heat exposures 2.2- to fourfold higher than all prior years on record. In the Florida Keys and Dry Tortugas, 97.8 to 100% of the Acropora palmata and Acropora cervicornis colonies died. Mortality was lower offshore southeast Florida (37.9%), reflecting cooler temperatures in this region. Since the late 1970s, multiple stressors had already reduced the ecological relevance of Acropora in Florida, but the 2023 heat wave marks their functional extinction from FCR.

Suggested Citation

Manzello, D.P., Cunning, R., Karp, R.F., Baker, A.C., Bartels, E., Bonhag, R., Borreil, A., Bourque, A., Brown, K.T., Bruckner, A.W., Corbett, B., D’Alessandro, M., Dahlgren, C., Dilworth, J., Gieger, E., Gilliam, D.S., Gomez, M., Hanson, G., Harrell, C., Hesley, D., Huebner, L.K., Kenkel, C.D., Koch, H.R., Kuehl, J., Kuffner, I.B., Ladd, M.C., Lee, S., Lesneski, K.C., Lewan, A., Lirman, D., Liu, G., Matsuda, S.B., Montoya-Maya, P.H., Moore, J., Muller, E.M., Nedimeyer, K., Parkinson, J.E., Ruzicka, R., Spadaro, J., Spady, B.L., Stein, J., Unsworth, J.D., Wen, A.D., Williams, D.E., Williams, S., Williamson, O.M., 2025, Heat-driven functional extinction of Caribbean Acropora corals from Florida's Coral Reef: Science, v. 390, no. 6771, p. 361-366, https://doi.org/10.1126/science.adx7825.

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Publication type Article
Publication Subtype Journal Article
Title Heat-driven functional extinction of Caribbean Acropora corals from Florida's Coral Reef
Series title Science
DOI 10.1126/science.adx7825
Volume 390
Issue 6771
Publication Date October 23, 2025
Year Published 2025
Language English
Publisher AAAS
Contributing office(s) St. Petersburg Coastal and Marine Science Center
Description 6 p.
First page 361
Last page 366
Country United States
State Florida
Other Geospatial Florida Keys
Additional publication details