Weddell seals near the fastest melting glacier in Antarctica prefer shallow, coastal and partially ice-covered waters

Weddell seals near the fastest melting glacier in Antarctica prefer shallow, coastal and partially ice-covered waters
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南极洲融化最快的冰川附近的威德尔海豹更喜欢浅水、沿海和部分冰雪覆盖的水域

DOI:
10.1101/2022.10.24.513500
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发表时间:
2022
期刊:
--
影响因子:
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通讯作者:
Bortolotto G
Bortolotto G
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作者:
Bortolotto G

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南极洲的冰架正在加速融化,在阿蒙森海观察到的速度最快,那里的威德尔海豹研究不足。通过对无与伦比的遥测跟踪数据集进行建模,我们发现该地区的顶级捕食者更有可能在较浅的沃茨中发现,靠近海岸,一半被冰覆盖,海底温度约为0.5°C或更低。它们在冬季的分布更多地局限于阿蒙森海东部的沿海地区,在温暖的月份会扩散开来。这种波动反映了它们栖息地的巨大变化,表明它们对即将到来的气候变化影响的潜在敏感性。我们讨论了它们与该地区南极洋枪鱼渔业的重叠,以及全球变暖对海豹生态的潜在后果。
Antarctic ice-shelves melting is accelerating, and the highest rates for the continent are observed in the Amundsen Sea, where Weddell seals are understudied. By modelling an unrivalled telemetry tracking dataset, we show that this top predator in the area is more likely found in shallower waters, closer to the coast, half-covered by ice and where the temperature at the ocean bottom is around 0.5°C or colder. Their distribution during winter is more restricted to coastal areas in the eastern Amundsen Sea and spread out in warmer months. That fluctuation reflects the drastic variation in their habitat illustrating their potential sensitivity to the upcoming impacts of climate changes. We discuss their overlap with Antarctic toothfish fisheries in the area and the potential consequences of global warming to the ecology of the seals.
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