A global analysis of coral bleaching over the past two decades
A global analysis of coral bleaching over the past two decades
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DOI：
10.1038/s41467-019-09238-2
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发表时间：
2019-03-20
影响因子：
16.6
通讯作者：
van Woesik, R.
中科院分区：
文献类型：
--
作者：
Sully, S.;Burkepile, D. E.;van Woesik, R.
与气候变化相关的热应力事件导致珊瑚白化和死亡，威胁着全球的珊瑚礁。然而，珊瑚白化模式在空间和时间上各不相同。在这里，我们综合了1998年至2017年在81个国家的3351个地点对珊瑚漂白的实地观察，并使用一套环境协变量和温度指标来分析漂白模式。珊瑚白化在经历高强度和高频率热应力异常的地方最为常见。然而，珊瑚漂白是显着不太常见的地方，在海面温度（SST）异常的变化很大。从地理上看，珊瑚白化的可能性最大的地点是热带中纬度地区（赤道以北和以南15-20度），尽管赤道地区的热应力水平相似。在过去的十年中，珊瑚漂白的发生在比前十年明显更高的SST（类似于0.5摄氏度），这表明热敏感基因型可能已经下降和/或适应，使得剩余的珊瑚种群现在有更高的漂白热阈值。
Thermal-stress events associated with climate change cause coral bleaching and mortality that threatens coral reefs globally. Yet coral bleaching patterns vary spatially and temporally. Here we synthesize field observations of coral bleaching at 3351 sites in 81 countries from 1998 to 2017 and use a suite of environmental covariates and temperature metrics to analyze bleaching patterns. Coral bleaching was most common in localities experiencing high intensity and high frequency thermal-stress anomalies. However, coral bleaching was significantly less common in localities with a high variance in sea-surface temperature (SST) anomalies. Geographically, the highest probability of coral bleaching occurred at tropical mid-latitude sites (15-20 degrees north and south of the Equator), despite similar thermal stress levels at equatorial sites. In the last decade, the onset of coral bleaching has occurred at significantly higher SSTs (similar to 0.5 degrees C) than in the previous decade, suggesting that thermally susceptible genotypes may have declined and/or adapted such that the remaining coral populations now have a higher thermal threshold for bleaching.