Specific occupation of penguins under Neoglacial cooling on the Scott Coast, Antarctica

QUATERNARY SCIENCE REVIEWS

卷:264

Article

Yang, Lianjiao^1,2  Gao, Yuesong^1,2  Xu, Qibin^1,2  Huang, Tao³  Yang, Wenqing^1,2  Chu, Zhuding^1,2  Wang, Yuhong^1,2  Wang, Jianjun⁴  Sun, Liguang^1,2  Xie, Zhouqing^1,2 

[1] Univ Sci & Technol China, Inst Polar Environm, Dept Environm Sci & Engn, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Anhui Key Lab Polar Environm & Global Change, Dept Environm Sci & Engn, Hefei 230026, Anhui, Peoples R China

[3] Anhui Univ, Sch Resources & Environm Engn, Hefei 230601, Anhui, Peoples R China

[4] Minist Nat Resources, Inst Oceanog 3, Key Lab Global Change & Marine Atmospher Chem, Xiamen, Peoples R China

关键词: Penguins;    Climate change;    Neoglacial;    Ross sea;   

DOI  :  10.1016/j.quascirev.2021.107010

来源: Elsevier

【 摘 要 】

Drastic climate change is widely believed to threaten the ecological security of penguins. Previous studies have concluded that penguins on the Scott Coast, southern Ross Sea, disappeared from similar to 2000 yr BP; two opposite hypotheses of cooling and warming have been proposed for the disappearance. Here, by identifying penguin guano and remains such as eggshell fragments, bones and feathers in a sediment profile from Dunlop Island, we found that this island was not abandoned at similar to 2000 yr BP. In addition, sedimentological evidence from Cape Ross deduced the permanent snow/ice cover at similar to 1700 yr BP, which is consistent with a Neoglacial cooling period on the Scott Coast. We suggest that Neoglacial cooling caused the widespread abandonment of penguin colonies on the Scott Coast, by the increased coastal sea ice and/or snow/ice accumulation. However, penguins persisted at particular localities due to specific topographical or oceanic conditions shielding them from the impacts of snow and ice. (C) 2021 Elsevier Ltd. All rights reserved.

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