From warm to cold: migration of Adélie penguins within Cape Bird, Ross Island.
From warm to cold: migration of Adélie penguins within Cape Bird, Ross Island.
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从温暖到寒冷：罗斯岛伯德角的阿德利企鹅迁徙。
DOI：
10.1038/srep11530
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发表时间：
2015-06-26
影响因子：
4.6
通讯作者：
Emslie SD
中科院分区：
文献类型：
--
作者：
Nie Y;Sun L;Liu X;Emslie SD
由于对环境变化的敏感性，南极企鹅被广泛用作古气候研究的生物指标。根据在4个鸟生沉积物剖面中确定的生物元素组合，我们重建了罗斯岛伯德角1600年来企鹅种群的历史变化。公元1400年左右，在不同的剖面上观察到明显的企鹅种群高峰，这表明企鹅在该地区内迁徙的可能性很大。在所分析的一条剖面上，最明显的标志是从公元1400年到1900年的砂层。多项物理化学参数表明，该砂层不是在湖相环境中形成的，而是海相形成的。在小冰期较冷的气候条件下，均衡下沉和频繁的风暴被认为是导致企鹅群被遗弃的原因，我们认为企鹅从中鸟角沿海地区向北迁移到其他沉积物剖面中记录的地势更高的地方。这次迁徙是对全球气候变化和南极洲可能随后的地质影响的生态反应。
Due to their sensitivity to environmental change, penguins in Antarctica are widely used as bio-indicators in paleoclimatic research. On the basis of bio-element assemblages identified in four ornithogenic sediment profiles, we reconstructed the historical penguin population change at Cape Bird, Ross Island, for the past 1600 years. Clear succession of penguin population peaks were observed in different profiles at about 1400 AD, which suggested a high probability of migration within this region. The succession was most obviously marked by a sand layer lasting from 1400 to 1900 AD in one of the analyzed profiles. Multiple physical/chemical parameters indicated this sand layer was not formed in a lacustrine environment, but was marine-derived. Both isostatic subsidence and frequent storms under the colder climatic condition of the Little Ice Age were presumed to have caused the abandonment of the colonies, and we believe the penguins migrated from the coastal area of mid Cape Bird northward and to higher ground as recorded in the other sediment profiles. This migration was an ecological response to global climate change and possible subsequent geological effects in Antarctica.