High frequency temperature variability reduces the risk of coral bleaching.
High frequency temperature variability reduces the risk of coral bleaching.
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DOI：
10.1038/s41467-018-04074-2
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发表时间：
2018-04-26
影响因子：
16.6
通讯作者：
Davis KA
中科院分区：
文献类型：
--
作者：
Safaie A;Silbiger NJ;McClanahan TR;Pawlak G;Barshis DJ;Hench JL;Rogers JS;Williams GJ;Davis KA
珊瑚白化是藻类共生体从它们的刺胞宿主中有害的驱逐，主要发生在珊瑚暴露于热应力时。在珊瑚礁尺度（<1公里）内，白化的发生率和严重程度往往在空间上是不均匀的，因此无法使用传统的遥感产品进行预测。在这里，我们系统地评估了20个环境变量的原位测量值与7个遥感海温热应力指标之间的关系，以及在全球5个主要珊瑚礁区域的珊瑚礁位置观察到的81次漂白事件。我们发现，高频温度变化（即每日温度范围）是预测白化患病率的最重要因素，并具有缓解作用，例如，每日温度范围增加1°C将使更严重的白化几率降低33倍。我们的研究结果表明，具有更高频率温度变化的珊瑚礁可能代表着保护珊瑚生态系统免受海洋温度变暖造成的主要威胁的特别重要的机会。珊瑚白化通常是通过对大尺度海洋温度的遥感来预测的，这模糊了重要的珊瑚礁尺度驱动因素和生物反应。在这里，作者使用原位数据表明，在昼夜温度变化较大的珊瑚礁栖息地，全球白化程度较低。
Coral bleaching is the detrimental expulsion of algal symbionts from their cnidarian hosts, and predominantly occurs when corals are exposed to thermal stress. The incidence and severity of bleaching is often spatially heterogeneous within reef-scales (<1 km), and is therefore not predictable using conventional remote sensing products. Here, we systematically assess the relationship between in situ measurements of 20 environmental variables, along with seven remotely sensed SST thermal stress metrics, and 81 observed bleaching events at coral reef locations spanning five major reef regions globally. We find that high-frequency temperature variability (i.e., daily temperature range) was the most influential factor in predicting bleaching prevalence and had a mitigating effect, such that a 1 °C increase in daily temperature range would reduce the odds of more severe bleaching by a factor of 33. Our findings suggest that reefs with greater high-frequency temperature variability may represent particularly important opportunities to conserve coral ecosystems against the major threat posed by warming ocean temperatures. Coral bleaching is often predicted via remote sensing of ocean temperatures at large scales, obscuring important reef-scale drivers and biological responses. Here, the authors use in- situ data to show that bleaching is lower globally at reef habitats with greater diurnal temperature variability.
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影响因子：
4.6
作者：
DeCarlo TM;Cohen AL;Wong GT;Davis KA;Lohmann P;Soong K
通讯作者：
Soong K
影响因子：
56.9
作者：
Ainsworth, Tracy D.;Heron, Scott F.;Leggat, William
通讯作者：
Leggat, William
影响因子：
3.5
作者：
Berkelmans, R;De'ath, G;Skirving, WJ
通讯作者：
Skirving, WJ
影响因子：
2.5
作者：
Berkelmans, R
通讯作者：
Berkelmans, R
DOI：
10.1073/pnas.1210224110
发表时间：
2013-01-22
影响因子：
11.1
作者：
Barshis, Daniel J.;Ladner, Jason T.;Palumbi, Stephen R.
通讯作者：
Palumbi, Stephen R.