Turbid reefs moderate coral bleaching under climate‐related temperature stress
Turbid reefs moderate coral bleaching under climate‐related temperature stress
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DOI：
10.1111/gcb.14948
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发表时间：
2020-01
影响因子：
11.6
通讯作者：
S. Sully;R. van Woesik
中科院分区：
文献类型：
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作者：
S. Sully;R. van Woesik
导致珊瑚白化和死亡的热应激事件最近在频率和严重程度上有所增加。然而，很少有研究探索适度的珊瑚漂白条件。考虑到高光和高海洋温度共同导致珊瑚漂白，我们探索了在光照减少的混浊地区的珊瑚是否比其他地区的珊瑚在热应激事件中更不可能漂白。我们用贝叶斯模型分析了全球3,694个地点的珊瑚漂白、温度和浑浊度数据，发现Kd490(与浑浊度呈正相关)在热应激事件期间减少了珊瑚漂白的0.080至0.127。世界上大约12%的珊瑚礁存在于这一“适度浑浊”范围内，30%的适度浑浊的珊瑚礁位于珊瑚三角地区。我们认为，这些浑浊的近岸环境可能会在气候变化中提供一些避难所，但这些珊瑚礁需要高度的保护地位，才能维持它们接近人口稠密的地方。
Thermal‐stress events that cause coral bleaching and mortality have recently increased in frequency and severity. Yet few studies have explored conditions that moderate coral bleaching. Given that high light and high ocean temperature together cause coral bleaching, we explore whether corals at turbid localities, with reduced light, are less likely to bleach during thermal‐stress events than corals at other localities. We analyzed coral bleaching, temperature, and turbidity data from 3,694 sites worldwide with a Bayesian model and found that Kd490, a measurement positively related to turbidity, between 0.080 and 0.127 reduced coral bleaching during thermal‐stress events. Approximately 12% of the world's reefs exist within this “moderating turbidity” range, and 30% of reefs that have moderating turbidity are in the Coral Triangle. We suggest that these turbid nearshore environments may provide some refuge through climate change, but these reefs will need high conservation status to sustain them close to dense human populations.