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首页> 外文期刊>Polar biology >Recent occupation by Ad,lie Penguins (Pygoscelis adeliae) at Hope Bay and Seymour Island and the 'northern enigma' in the Antarctic Peninsula
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Recent occupation by Ad,lie Penguins (Pygoscelis adeliae) at Hope Bay and Seymour Island and the 'northern enigma' in the Antarctic Peninsula

机译：Ad，lie企鹅（Pygoscelis adeliae）最近在霍普湾和西摩岛的占领以及南极半岛的“北谜”

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摘要

We excavated active and abandoned Ad,lie Penguin (Pygoscelis adeliae) colonies at Seymour Island and Hope Bay, Antarctic Peninsula, to determine an occupation history for this species at these sites. Previous research at Hope Bay has indicated an occupation there since the middle Holocene, based on a sediment record from Lake Boeckella. Excavations revealed only shallow and relatively fresh ornithogenic soils in the active colonies at the two localities. At least 53 abandoned pebble mounds were located at Hope Bay of which nine were excavated and four were sampled by probing to recover organic remains to determine their age. Radiocarbon dating of egg membrane, feather, and bone from both sites revealed a young occupation dating to less than similar to 600 years after correcting for the marine carbon reservoir effect. The mismatch in the geologic record of Ad,lie Penguin occupation in the northern Antarctic Peninsula, including Lake Boeckella sediments and geologic deposits and lake sediments on King George Island, with more direct evidence of breeding colonies from ornithogenic soils from active and abandoned colonies is hereby referred to as the 'northern enigma' as it does not occur in other regions of Antarctica including the southern Antarctic Peninsula, East Antarctica, or the Ross Sea, where the penguin record extends to the early to middle Holocene and matches well with the geologic record of deglaciation and penguin occupation. As yet, there is no convincing explanation for the 'northern enigma'.
机译：我们在南极半岛西摩岛和希望湾挖掘了活跃的和废弃的阿德利企鹅（Pygoscelis adeliae）殖民地，以确定这些物种在这些地点的占领历史。根据Boeckella湖的沉积记录，霍普湾以前的研究表明，自中新世以来一直存在该区域。发掘显示在这两个地区的活跃殖民地中，只有浅层和相对较新鲜的鸟类鸟类土壤。霍普湾至少有53个废弃的卵石堆，其中9个被挖出，通过探测有机残骸以确定其年龄，对其中4个进行了采样。两个地点的卵膜，羽毛和骨头的放射性碳测年表明，校正海洋碳储层效应后，年​​轻的职业可追溯到不到600年。因此，南极半岛北部Ad，lie企鹅占领的地质记录不匹配，包括Boeckella湖沉积物和George King岛上的地质沉积物和湖泊沉积物，更直接的证据是从活动和废弃的殖民地中的鸟类生土中繁殖出殖民地。之所以称为“北谜”，是因为它在南极其他地区（包括南极半岛，南极东部或罗斯海）不发生，那里的企鹅记录一直延伸到全新世的早期到中部，并且与地质记录非常吻合和企鹅的占领到目前为止，还没有令人信服的“北谜”解释。

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  • 来源
    《Polar biology》 |2018年第1期|71-77|共7页
  • 作者

    Emslie Steven D.; McKenzie Ashley; Marti Lucas J.; Santos Mercedes;

  • 作者单位

    Univ N Carolina, Dept Biol & Marine Biol, 601 S Coll Rd, Wilmington, NC 28403 USA;

    Univ N Carolina, Dept Biol & Marine Biol, 601 S Coll Rd, Wilmington, NC 28403 USA;

    Univ CAECE, Dept Ciencias Biol, Av Mayo 866, Buenos Aires, DF, Argentina;

    Inst Antartico Argentino, Dept Biol Predadores Tope, 25 Mayo 1143,B1650CSP, San Martin, Buenos Aires, Argentina|Univ Nacl La Plata, Fac Ciencias Nat & Museo, Labs Anexos, Calle 64 3,B1904AMA, La Plata, Buenos Aires, Argentina;

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  • 正文语种 eng
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  • 关键词

    Adelie Penguin; Occupation history; Ornithogenic soils; Hope Bay; Seymour Island;

    机译：阿德利企鹅（Adelie Penguin）;职业历史;鸟类土壤;霍普湾;西摩岛;

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