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Marine heatwaves select for thermal tolerance in a reef-building coral

E. J. Howells (), D. Abrego, S. Schmidt-Roach, E. Puill-Stephan, H. Denis, S. Harii, L. K. Bay, J. A. Burt, K. Monro and M. Aranda
Additional contact information
E. J. Howells: Southern Cross University
D. Abrego: Southern Cross University
S. Schmidt-Roach: King Abdullah University of Science and Technology
E. Puill-Stephan: Zayed University
H. Denis: Southern Cross University
S. Harii: University of the Ryukyus
L. K. Bay: Australian Institute of Marine Science
J. A. Burt: New York University Abu Dhabi
K. Monro: Monash University
M. Aranda: King Abdullah University of Science and Technology

Nature Climate Change, 2025, vol. 15, issue 8, 829-832

Abstract: Abstract Standing genetic variation in fitness-related traits is critical to determine how fast populations can adapt to climate warming but is unknown for many species. Here we show that heritable genetic variation in heat tolerance in reef-building coral populations is widespread and strongly associated with selective pressure imposed by marine heatwaves. Our findings suggest that coral populations may be adapting to warming consistent with recent increases in their upper thermal limits.

Date: 2025
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DOI: 10.1038/s41558-025-02381-3

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