Emperors on thin ice: three years of breeding failure at Halley Bay
Emperors on thin ice: three years of breeding failure at Halley Bay
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DOI：
10.1017/s0954102019000099
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发表时间：
2019-06-01
影响因子：
1.6
通讯作者：
Trathan, Philip N.
中科院分区：
文献类型：
--
作者：
Fretwell, Peter T.;Trathan, Philip N.
卫星图像显示，位于哈雷湾的世界第二大帝企鹅殖民地已经遭受了三年的几乎完全繁殖失败。虽然，像所有的皇帝殖民地，有很大的年际变化，在繁殖成功在这个网站，长期的失败是前所未有的历史记录。观察到的事件发生在鸟类习惯用于繁殖的冰溪中的坚冰早期破裂之后。最初的分裂与2015年9月的一个特别暴风雨时期有关，这与60多年来最强的厄尔尼诺现象，强风和当地创纪录的低海冰年相对应。此后两年，情况一直没有恢复。与此同时，在同样的三年期间，附近的道森-兰伯顿殖民地，55公里以南，企鹅数量增加了十倍以上。作者认为这与以前在哈雷湾繁殖的鸟类的移民有关。研究这个“双城记”为在未来气候变化情景下模拟企鹅运动提供了有价值的信息。
Satellite imagery is used to show that the world's second largest emperor penguin colony, at Halley Bay, has suffered three years of almost total breeding failure. Although, like all emperor colonies, there has been large inter-annual variability in the breeding success at this site, the prolonged period of failure is unprecedented in the historical record. The observed events followed the early breakup of the fast ice in the ice creeks that the birds habitually used for breeding. The initial breakup was associated with a particularly stormy period in September 2015, which corresponded with the strongest El Nino in over 60 years, strong winds, and a record low sea-ice year locally. Conditions have not recovered in the two years since. Meanwhile, during the same three-year period, the nearby Dawson-Lambton colony, 55 km to the south, has seen a more than tenfold increase in penguin numbers. The authors associate this with immigration from the birds previously breeding at Halley Bay. Studying this 'tale of two cities' provides valuable information relevant to modelling penguin movement under future climate change scenarios.