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<p>Climate change is shifting coral distributions, with corals expanding in cooler, high-latitude environments. While temperate regions may serve as refuges from heat stress, they also present new challenges such as colder winters, greater seasonal variation, and altered light and nutrient conditions. Lipids are critical for adaptation to environmental change, but the mechanisms of lipid remodelling in corals at their range limits are not well understood. In this study, we used the Coral Bleaching Automated Stress System (CBASS) to expose a temperate coral (<i>Plesiastrea versipora</i>) near the northern limit of its distribution and a subtropical coral (<i>Pocillopora aliciae</i>) at its poleward range limit to acute high- and low-temperature stress (11–32 °C). Surprisingly, both species showed minimal changes in photophysiology (<i>F</i><sub><i>v</i></sub><i>/F</i><sub><i>m</i></sub>) and limited lipid remodelling under acute stress. However, seasonal shifts in lipid composition—particularly increased membrane lipids (e.g. phosphatidylcholine, sterols, and prenols) in winter—suggest lipid-based strategies may support survival in cold, variable environments. In&#xa0;<i>P. aliciae</i>, higher levels of glycerolipids in Symbiodiniaceae during winter may also help stabilise thylakoid membranes and enhance photophysiology under low temperatures and shorter daylight hours. These results, from the first known use of CBASS on temperate corals, highlight potential mechanisms that allow corals to persist at the margins of their environmental ranges. Understanding these processes is key to predicting coral resilience and guiding conservation strategies in a warming world.</p>

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Comparative lipidomics of a temperate and a subtropical coral under acute temperature stress

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月18日

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  • Laura M. La Motta,
  • Axel Olander,
  • Matthew P. Padula,
  • Brigitte Sommer,
  • Emma F. Camp,
  • Jennifer L. Matthews

摘要

Climate change is shifting coral distributions, with corals expanding in cooler, high-latitude environments. While temperate regions may serve as refuges from heat stress, they also present new challenges such as colder winters, greater seasonal variation, and altered light and nutrient conditions. Lipids are critical for adaptation to environmental change, but the mechanisms of lipid remodelling in corals at their range limits are not well understood. In this study, we used the Coral Bleaching Automated Stress System (CBASS) to expose a temperate coral (Plesiastrea versipora) near the northern limit of its distribution and a subtropical coral (Pocillopora aliciae) at its poleward range limit to acute high- and low-temperature stress (11–32 °C). Surprisingly, both species showed minimal changes in photophysiology (Fv/Fm) and limited lipid remodelling under acute stress. However, seasonal shifts in lipid composition—particularly increased membrane lipids (e.g. phosphatidylcholine, sterols, and prenols) in winter—suggest lipid-based strategies may support survival in cold, variable environments. In P. aliciae, higher levels of glycerolipids in Symbiodiniaceae during winter may also help stabilise thylakoid membranes and enhance photophysiology under low temperatures and shorter daylight hours. These results, from the first known use of CBASS on temperate corals, highlight potential mechanisms that allow corals to persist at the margins of their environmental ranges. Understanding these processes is key to predicting coral resilience and guiding conservation strategies in a warming world.