Diverse plant and animal genetic records from Holocene and Pleistocene sediments
Diverse plant and animal genetic records from Holocene and Pleistocene sediments
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全新世和更新世沉积物中多样的动植物遗传记录
DOI：
10.1126/science.1084114
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发表时间：
2003-05-02
期刊：
影响因子：
56.9
通讯作者：
Cooper, A
中科院分区：
文献类型：
--
作者：
Willerslev, E;Hansen, AJ;Cooper, A
对永久冻土和温带沉积物的遗传分析表明，植物和动物的DNA可能会保存很长一段时间，即使在没有明显的宏体化石的情况下。在西伯利亚，5个年龄从40万到1万年的永久冻土核心包含至少19种不同的植物分类群，包括已知最古老的经鉴定的古代DNA序列，以及包括猛犸、野牛和马在内的巨型动物序列。遗传数据记录了白令纪植被和动物群在分类多样性和组成方面的一些巨大变化。新西兰的温带洞穴沉积物也产生了灭绝生物群的DNA序列，包括两种平胸恐鸟和29种前人类环境特征的植物分类群。因此，许多沉积矿床可能包含独特的、广泛的古环境成因记录。
Genetic analyses of permafrost and temperate sediments reveal that plant and animal DNA may be preserved for long periods, even in the absence of obvious macrofossils. In Siberia, five permafrost cores ranging from 400,000 to 10,000 years old contained at least 19 different plant taxa, including the oldest authenticated ancient DNA sequences known, and megafaunal sequences including mammoth, bison, and horse. The genetic data record a number of dramatic changes in the taxonomic diversity and composition of Beringian vegetation and fauna. Temperate cave sediments in New Zealand also yielded DNA sequences of extinct biota, including two species of ratite moa, and 29 plant taxa characteristic of the prehuman environment. Therefore, many sedimentary deposits may contain unique, and widespread, genetic records of paleoenvironments.