What question did this study set out to answer?

The aim is to investigate how fine-scale thermal variation impacts coral bleaching during severe marine heatwaves.

February 25, 2026Coral ReefsOpen Access

Shallow seasonal stratification ameliorates coral bleaching during record-breaking marine heatwaves in a marginal subtropical system

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Examines coral bleaching outcomes during marine heatwaves, suggesting local thermal refuges promote coral survival.

The aim is to investigate how fine-scale thermal variation impacts coral bleaching during severe marine heatwaves.
Utilized high-resolution in situ temperature loggers to record temperatures at various coral depths.
Assessed bleaching prevalence across coral species in relation to thermal exposure.
Analyzed data from two marine heatwaves in 2022 and 2024 across three coral sites.
Surface temperatures surpassed the bleaching threshold for extended periods, causing significant heat accumulation.
Seasonal stratification reduced heat accumulation and bleaching prevalence, particularly in shallower depths.
Coral species exhibited varying bleaching probabilities, with Goniopora having the highest and Porites the lowest.

Pérez-Rosales et al. (2026) studied this question.

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