1997-98: Unprecedented thermal stress to coral reefs?
1997-98: Unprecedented thermal stress to coral reefs?
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DOI：
10.1029/2000gl011715
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发表时间：
2000-12-01
影响因子：
5.2
通讯作者：
Lough, JM
中科院分区：
文献类型：
--
作者：
Lough, JM
大规模漂白是珊瑚在温暖季节受到高于正常海水温度的压力反应。1997- 1998年期间，世界上许多珊瑚礁出现了数量空前的白化现象。观察证据表明，自20世纪70年代末以来，大规模珊瑚白化事件的频率有所增加。两个指数的暖季海表温度（SST，SST最大距平和度月）的47个珊瑚礁网站漂白发生在1997-98年。1997-98年期间，绝大多数珊瑚礁地点的热应力水平是1903-99年期间无法比拟的。在此期间，这些珊瑚礁的暖季SST显著变暖，自20世纪70年代末以来，暖季SST极端事件的频率有所增加，热带SST的持续变暖可能是由于温室效应的增强，这将增加珊瑚礁的热应力水平。白化事件的频率增加将降低珊瑚的恢复能力，并可能大大改变当今珊瑚礁生态系统的构成。
Mass bleaching is a stress response of corals subjected to warmer-than-normal seawater temperatures during the warm season. During 1997-98 there were unprecedented numbers of reports of bleaching on many of the world's coral reefs. Observational evidence suggests an increase in frequency of mass coral bleaching events since the late 1970s. Two indices of warm season sea surface temperatures (SSTs; SST maximum anomaly and degree-months) are presented for 47 reef sites where bleaching occurred during 1997-98. The level of thermal stress at the vast majority of these coral reef sites during 1997-98 was unmatched in the period 1903-99. Warm season SSTs at these coral reef sites have significantly warmed over this period and the frequency of warm season SST extremes has increased since the late 1970s, Continued warming of tropical SSTs, as is likely due to the enhanced greenhouse effect, will increase the level of thermal stress to coral reefs. Increased frequency of bleaching events will reduce corals' capacity to recover and may significantly alter the make-up of present day coral reef ecosystems.