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首页> 外文期刊>Journal of Paleolimnology >Late Holocene Adélie penguin population dynamics at Zolotov Island, Vestfold Hills, Antarctica
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Late Holocene Adélie penguin population dynamics at Zolotov Island, Vestfold Hills, Antarctica

机译：南极Vestfold Hills的Zolotov岛晚期新世Adélie企鹅种群动态

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摘要

We inferred late Holocene Adélie penguin occupation history and population dynamics on Zolotov Island, Vestfold Hills, Antarctica, using geochemical data from a dated ornithogenic sediment core (ZOL4). Radiocarbon dates on fossil penguin bones in the core indicate that Adélie penguins occupied the island as early as 1,800 years before present (yr BP), following the retreat of the Sørsdal glacier. This occupation began ~1,200 years later than that observed at Ardley Island and King George Island, in the South Shetland Islands. Phosphorus was identified as the most indicative bio-element for penguin guano in core ZOL4, and was used to infer past penguin population dynamics. Around 1,800 years ago, the Adélie penguin populations at both Zolotov Island and Ardley Island increased rapidly and reached their highest levels ~1,000 yr BP. For the past ~900 years, the penguin populations at Zolotov Island have shown a general rising trend, with fluctuations, while those at Ardley Island have shown a moderate decreasing trend. The Adélie penguin populations at both Ardley Island and Zolotov Island showed a clear decline ~300 years ago, which we interpret as a response to the Little Ice Age, or a neoglacial cooling event.
机译：我们使用来自过时鸟类鸟类沉积岩心（ZOL4）的地球化学数据，推论了全新世阿德利企鹅的晚期占领历史和南极洲维索福德山的佐洛托夫岛上的种群动态。核心化石企鹅骨骼上的放射性碳年代表明，阿德利企鹅早在现在的1800年之前（即BP），就在Sørsdal冰川撤退之后占领了该岛。这种占领比南设得兰群岛的阿德利岛和乔治国王岛晚了约1200年。磷是ZOL4核心中企鹅鸟粪中最具指示性的生物元素，可用于推断过去的企鹅种群动态。大约1800年前，佐洛托夫岛和阿德利岛的阿德利企鹅种群迅速增加，并达到了约1000年BP的最高水平。在过去的约900年中，佐洛托夫岛的企鹅种群呈总体上升趋势，并有波动，而阿德利岛的企鹅种群呈下降趋势。大约300年前，阿德利岛和佐洛托夫岛的阿德利企鹅种群呈明显下降趋势，我们将其解释为对小冰河时代或新冰河降温事件的反应。

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