Coral bleaching in Okinawa, 1980 vs 1998
Coral bleaching in Okinawa, 1980 vs 1998
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冲绳珊瑚白化，1980 年与 1998 年
DOI：
10.3755/jcrs.1999.83
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
K. Yamazato
中科院分区：
文献类型：
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作者：
K. Yamazato
作者目睹了1980年和1998年在雪子岛和冲绳岛发生的两次珊瑚白化事件。虽然无法获得1998年事件的最终报告，但作者试图根据他自己对1980年事件的报告（Yamazato 1981）和他对1998年事件的个人经历，对这些事件进行一些比较。1980年日本冲绳岛雪子岛周围的珊瑚白化似乎是一个局部事件，而1998年的珊瑚白化则更为广泛，影响到琉球群岛和九州南部的所有岛屿。1980年夏季白天退潮时，礁滩表面温度异常高，1998年整个夏季持续出现异常高的现象，不仅影响珊瑚礁水域，而且昼夜影响沿岸水域。1980年，超过40%的珊瑚群落白化一次，约10%死亡，其余的白化珊瑚在次年1月恢复。在1998年的事件中，根据作者在同一珊瑚礁区域的目视观察，几乎90%的珊瑚和软珊瑚白化并死亡，只有少数物种的少数种群恢复。除了这些个人观察之外，还提出了一些新的调查结果，并对这两个事件进行了比较。
The author has witnessed two coral bleaching events taken place at Sesoko and Okinawa islands in 1980 and 1998. Although the final reports of the 1998 event are not accessible, the author tries to make some comparisons among the events according to his own report on the 1980 event (Yamazato 1981) and his personal experiences of the 1998 event. Coral bleaching in 1980 around Sesoko Island, Okinawa, Japan appears to have been a local event, while that of 1998 was much more extensive affecting all islands of the Ryukyu Islands and Southern Kyushu. Abnormally high surface temperatures were observed on the reef flat during daytime low tide in the summer of 1980, while it was observed continuously throughout the summer of 1998, affecting not only coral reef waters but also coastal waters both day and night. In 1980, over 40% of coral colonies bleached once and about 10% died, the rest of the bleached corals recovered by the following January. In the 1998 event, according to visual observations of the author made on the same reef section, almost 90% of corals and soft corals bleached and died, with only a few colonies of a few species that recovered. In addition to these personal observations, some results of new surveys are presented and comparisons between the two events are made.