Coral mass mortalities in the Chagos Archipelago over 40 years: Regional species and assemblage extinctions and indications of positive feedbacks
Coral mass mortalities in the Chagos Archipelago over 40 years: Regional species and assemblage extinctions and indications of positive feedbacks
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DOI：
10.1016/j.marpolbul.2020.111075
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发表时间：
2020-05-01
影响因子：
5.8
通讯作者：
Fenner, Douglas
中科院分区：
文献类型：
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作者：
Sheppard, Charles;Sheppard, Anne;Fenner, Douglas
全球珊瑚礁珊瑚的减少主要是由几次海洋热浪造成的。这大大减少了珊瑚覆盖面积，也减少了珊瑚的多样性。虽然大多数地方缺乏检测珊瑚物种损失的数据，但印度洋中部查戈斯群岛的珊瑚礁有可追溯到20世纪70年代末的长期监测数据。自20世纪70年代以来，随着一些物种和关键物种组合的区域灭绝，覆盖范围出现了严重下降。珊瑚沉降量严重下降，同时生境质量大幅下降，减少了可供定居的生境。这显然是积极反馈的前兆。区域性物种灭绝主要发生在珊瑚覆盖面积达到
The global decline of reef corals has been driven largely by several marine heatwaves. This has greatly reduced coral cover but has reduced coral diversity also. While there is a lack of data in most locations to detect coral species losses, reefs of the Chagos Archipelago, central Indian Ocean, have long term monitoring data extending back to the late 1970s. Severe declines in cover have occurred since the 1970s, with regional extinctions of some species and key species assemblages. There is a severe decline in coral settlement, along with a substantial loss of habitat quality which has reduced the habitat available for settlement. This is a clear precursor to positive feedback. Regional species extinctions here occur mainly when total coral cover is