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| Main Authors: | , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Science advances
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42160419/ |
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Table of Contents:
- Acute temperature effects on cilia beating increase coral deoxygenation. Pacherres, Cesar O Dhillon, Max S Bilbo, Mads Hansen, Mikkel Brumley, Douglas R Aranda, Manuel Ahmerkamp, Soeren Kühl, Michael Animals Anthozoa Cilia Oxygen Temperature Coral Reefs Cilia-induced vortical flows are critical for regulating oxygen (O) and metabolite exchange across coral-water interfaces. While this active ventilation affects the coral tissue microenvironment, its role in thermal stress remains poorly understood. Using high-speed imaging of cilia beating, particle image velocimetry with O-sensitive nanoparticles, and a mechanistic transport model, we quantified how ciliary dynamics in the reef-building coral respond to acute warming in darkness. Moderate warming (~35°C) enhanced ciliary activity and advective transport yet paradoxically thickened the concentration boundary layer with O-depleted water, exposing tissues to transient hypoxia. At higher temperatures, ventilation failed to meet rising metabolic demands and anoxic regions expanded rapidly. Above ~37°C, ciliary coordination collapsed and vortical flows dissipated, shifting transport to a diffusion-limited regime accelerating coral mortality. These results identify ciliary beating as a key regulator of thermal tolerance and early indicator of critical physiological tipping points for reef-building corals in a warming, deoxygenating ocean.