Combining Bayesian age models and genetics to investigate population dynamics and extinction of the last mammoths in northern Siberia
Combining Bayesian age models and genetics to investigate population dynamics and extinction of the last mammoths in northern Siberia
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DOI：
10.1016/j.quascirev.2021.106913
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发表时间：
2021-03-31
影响因子：
4
通讯作者：
Lister, Adrian M.
中科院分区：
文献类型：
--
作者：
Dehasque, Marianne;Pecnerova, Patricia;Lister, Adrian M.
要了解灭绝事件的原因和影响，详细的信息是必要的。然而，这可能是具有挑战性的工作时，解决不好的古生物学数据集。提高数据分辨率的一种方法是结合不同的方法。在这项研究中，我们使用放射性碳和遗传数据来重建北方西伯利亚的长毛猛犸的种群历史和灭绝动态。我们生成了88个新的放射性碳年代，并将这些与先前公布的626个标本的年代相结合，构建贝叶斯年龄模型。这些模型表明，猛犸象在新仙女木（12.9e11.7 ky cal BP）爆发之前在东西伯利亚大陆消失。然而，猛犸象在西伯利亚中部和西部的最北部地区一直持续到全新世早期。131高质量的有丝分裂基因组，包括22个新的有丝分裂基因组在这项研究中产生的进一步的遗传结果，支持这一假设，猛犸象，或密切相关的，中央和/或西西伯利亚人口prononized弗兰格尔岛现在淹没北方西伯利亚平原。由于海平面上升，猛犸象被困在岛上，它们生活在另一个世纪。在弗兰格尔岛上生活了6000年，最终灭绝。四千年前。(c)2021作者由爱思唯尔有限公司出版。这是一篇开放获取的文章，使用CC BY许可证（http：//creativecommons.org/licenses/by/4.0/）。
To understand the causes and implications of an extinction event, detailed information is necessary. However, this can be challenging when working with poorly resolved paleontological data sets. One approach to increase the data resolution is by combining different methods. In this study, we used both radiocarbon and genetic data to reconstruct the population history and extinction dynamics of the woolly mammoth in northern Siberia. We generated 88 new radiocarbon dates and combined these with previously published dates from 626 specimens to construct Bayesian age models. These models show that mammoths disappeared on the eastern Siberian mainland before the onset of the Younger Dryas (12.9e11.7 ky cal BP). Mammoths did however persist in the northernmost parts of central and western Siberia until the early Holocene. Further genetic results of 131 high quality mitogenomes, including 22 new mitogenomes generated in this study, support the hypothesis that mammoths from, or closely related to, a central and/or west-Siberian population recolonized Wrangel Island over the now submerged northern Siberian plains. As mammoths became trapped on the island due to rising sea levels, they lived another ca. 6000 years on Wrangel Island before eventually going extinct ca. 4000 years ago.(c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).