The Costs and Benefits of Environmental Memory for Reef-Building Corals Coping with Recurring Marine Heatwaves
The Costs and Benefits of Environmental Memory for Reef-Building Corals Coping with Recurring Marine Heatwaves
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DOI：
10.1093/icb/icac074
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发表时间：
2022-06-06
影响因子：
2.6
通讯作者：
Barott, Katie L.
中科院分区：
文献类型：
--
作者：
Brown, Kristen T.;Barott, Katie L.
随着气候变化的加剧，海洋热浪发生的频率更高，导致每十年几次导致全球质量珊瑚漂白事件。尽管海洋热浪之间的时间减少了，但有证据表明，珊瑚礁建造的珊瑚可以在重复性海洋热浪中产生增加的漂白耐药性。这种通过环境记忆适应的现象可能是确保珊瑚持续存在的重要策略。但是，我们仍然对珊瑚礁建造珊瑚对连续的热浪及其对珊瑚礁的轨迹和弹性的影响，对珊瑚礁建造珊瑚的珊瑚珊瑚的敏感性（即应力积累或减弱）对珊瑚礁的轨迹构建明显的敏感性（即应力积累或弱化）知之甚少。在这里，我们强调说，不仅有些珊瑚会通过海洋热浪加强压力，而且在重复热浪中，许多其他人会遭受敏感性，从而进一步加剧了在重复事件中的压力反应并抑制适应性。在当前和预测的气候变化下，有必要更好地了解礁石上不同物种和个体的适应性与敏化轨迹，并确定漂白易感性的变化是否与生理适应性，与其他其他权衡有关生物学过程，最终在人类世中的珊瑚持久性。
Marine heatwaves are occurring more frequently as climate change intensifies, resulting in global mass coral bleaching events several times per decade. Despite the time between marine heatwaves decreasing, there is evidence that reef-building corals can develop increased bleaching resistance across repetitive marine heatwaves. This phenomenon of acclimatization via environmental memory may be an important strategy to ensure coral persistence; however, we still understand very little about the apparent acclimatization or, conversely, sensitization (i.e., stress accumulation or weakening) of reef-building corals to consecutive heatwaves and its implications for the trajectory and resilience of coral reefs. Here, we highlight that not only will some corals become stress hardened via marine heatwaves, but many other individuals will suffer sensitization during repeat heatwaves that further exacerbates their stress response during repeat events and depresses fitness. Under current and predicted climate change, it is necessary to gain a better understanding of the acclimatization vs. sensitization trajectories of different species and individuals on the reef, as well as identify whether changes in bleaching susceptibility relates to physiological acclimatization, trade-offs with other biological processes, and ultimately coral persistence in the Anthropocene.