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首页> 外文期刊>Waterbirds >Demographic History of the Gentoo Penguin (Pygoscelis papua) and the Adelie Penguin (Pygoscelis adeliae) on Admiralty Bay, King George Island, Antarctica
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Demographic History of the Gentoo Penguin (Pygoscelis papua) and the Adelie Penguin (Pygoscelis adeliae) on Admiralty Bay, King George Island, Antarctica

机译：南极洲乔治国王岛金钟湾的巴布亚企鹅（Pygoscelis papua）和阿德利企鹅（Pygoscelis adeliae）的人口历史

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摘要

There is growing evidence that during the past 100 years the climate of the Antarctic Peninsula has changed from a relatively cold environment to an increasingly warmer one. The penguins that breed in the region are sensitive to oceanographic environmental and climatic conditions. They are considered the bellwether sentinels of the ocean because of their sensitivity to environmental changes. The present study aimed to determine the evolutionary history of the Gentoo Penguin (Pygoscelis papua) and Adelie Penguin (Pygoscelis adeliae) at Admiralty Bay, King George Island A population genetics approach was used to examine the genetic variability of the two penguin species, searching to infer their demographics histories. The D-loop region from the mitochondrial DNA was sequenced in Adelie (n = 53) and Gentoo (n = 29) penguins. These species showed high genetic diversity, reflecting a large ancestral population size. The results also revealed that the Gentoo Penguin has had a stable population over the last 500,000 years, whereas Adelie Penguins showed a signal of population expansion estimated to have occurred between 300,000 to 400,000 years ago. Results indicate that penguin species respond differently to climate change and that Adelie Penguins are more sensitive to such changes. High genetic diversity and stability of the populations in recent centuries could be important for predicting the response to future events.
机译：越来越多的证据表明，在过去的100年中，南极半岛的气候已经从相对寒冷的环境变为越来越温暖的环境。在该地区繁殖的企鹅对海洋环境和气候条件敏感。由于它们对环境变化的敏感性，它们被认为是海洋的领头羊。本研究旨在确定乔治国王岛金钟湾的Gentoo企鹅（Pygoscelis papua）和Adelie Penguin（Pygoscelis adeliae）的进化史。采用种群遗传学方法研究了两种企鹅的遗传变异，推断他们的人口统计历史。线粒体DNA的D环区域在Adelie（n = 53）和Gentoo（n = 29）企鹅中测序。这些物种具有很高的遗传多样性，反映出祖先的种群数量很大。结果还显示，Gentoo企鹅在过去500,000年中拥有稳定的人口，而Adelie Penguins显示出人口膨胀的信号，估计发生在30万至40万年前。结果表明，企鹅物种对气候变化的反应不同，而阿德利企鹅对这种变化更敏感。最近几个世纪以来，高遗传多样性和种群稳定性对预测对未来事件的反应可能很重要。

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