Abstract: Coral bleaching is a major consequence of rising ocean temperatures and occurs when thermal stress destabilizes the symbiosis between corals and their photosynthetic algae. Understanding the mechanisms that drive bleaching is essential for explaining differences in resilience across reef systems. This review synthesizes evidence from laboratory and field-based studies to examine how heat stress alters coral–algal interactions and how corals reorganize their symbiont communities during recovery. A structured search identified 27 relevant studies; after screening, 14 full texts were assessed and 12 were included in this synthesis. Across these studies, heat exposure consistently reduced photosynthetic efficiency......
Keywords: Coral bleaching, oxidative stress, reactive oxygen species, thermal tolerance, symbiont shuffling, coral–algal symbiosis.
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