Coral growth persistence amidst bleaching events
Coral growth persistence amidst bleaching events
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DOI：
10.1002/lol2.10340
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发表时间：
2023-06-29
影响因子：
7.8
通讯作者：
DeCarlo，Thomas M. M.
中科院分区：
文献类型：
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作者：
Mantanona，Hanna C. C.;DeCarlo，Thomas M. M.
由于大规模的漂白事件大量减少了石珊瑚的数量，珊瑚礁上碳酸钙的产量减少，削弱了它们跟上海平面上升的能力。然而，由于缺乏适当的技术，以足够的分辨率从珊瑚骨骼中追溯提取这一信息，在漂白过程中幸存的野生珊瑚的钙化过程的扰动受到很大的限制。在这里，我们使用新的拉曼光谱技术来测试之前，期间和漂白后的长寿珊瑚的地球化学反应。在珊瑚钙化液中维持高的文石饱和状态（ΩAr）是驱动骨骼快速生长的关键，但当珊瑚在没有共生体的情况下能量耗尽时，这种饱和状态预计会减少。与此预期相反，我们的研究结果表明，珊瑚上调钙化液ΩArduring漂白和至少2年后恢复。这表明珊瑚漂白幸存者的钙化过程出乎意料地具有弹性。
As mass bleaching events decimate stony coral populations, production of calcium carbonate is diminished on reefs, dampening their capacity to keep pace with rising sea levels. However, perturbations to the calcification process of surviving wild corals during bleaching are poorly constrained, owing to the lack of suitable techniques to retroactively extract this information from coral skeletons at sufficient resolution. Here, we use novel Raman spectrometry techniques to test the biogeochemical response of long‐lived corals before, during, and after bleaching. Maintenance of high aragonite saturation state (ΩAr) in the coral calcifying fluid is key to driving rapid skeletal growth but would be expected to decrease when corals become energetically depleted without their symbionts. Contrary to this expectation, our results demonstrate that corals upregulate calcifying fluid ΩArduring bleaching and for at least 2 yr after recovery. This indicates that the calcification process of coral‐bleaching survivors is unexpectedly resilient.