Paleobiology of sabretooth cat Smilodon populator in the Pampean Region (Buenos Aires Province, Argentina) around the Last Glacial Maximum: Insights from carbon and nitrogen stable isotopes in bone collagen
Paleobiology of sabretooth cat Smilodon populator in the Pampean Region (Buenos Aires Province, Argentina) around the Last Glacial Maximum: Insights from carbon and nitrogen stable isotopes in bone collagen
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DOI：
10.1016/j.palaeo.2016.02.017
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发表时间：
2016-05-01
影响因子：
3
通讯作者：
Prevosti, Francisco J.
中科院分区：
文献类型：
--
作者：
Bocherens, Herve;Cotte, Martin;Prevosti, Francisco J.
剑齿猫是南美洲最大的猫科动物。它以北美移民的身份出现在早更新世的化石记录中，并在更新世-全新世边界附近灭绝。首次在阿根廷潘帕斯地区测量了年龄从25到10KYR BP的Smilodon标本的骨骼残骸的胶原蛋白的碳和氮稳定同位素值。通过与同时代的捕食者，如原生动物(大型犬科)和美洲豹(美洲豹)以及一系列潜在的猎物，如巨型地面树懒，水龙，弓齿目动物，马科动物，鹿科动物和啮齿动物的比较，可以确定在潘帕地区晚更新世的最后15,000年中，西罗齿从开阔的地形中摄取了基本上大型的猎物，如马劳氏动物和巨型地面树懒。它可能是在与大型犬类原胞动物竞争，但美洲豹显然是以较小的猎物为食。全新世初期较潮湿的气候可能对这种大型捕食者不利，并可能导致它的灭绝。这些结果也为理解美国生物大交换所涉及的生态过程提供了重要的见解。(C)2016爱思唯尔B.V.保留所有权利。
The sabretooth cat Smilodon populator was the largest felid in South America. It appears in the fossil record in the Early Pleistocene, as an immigrant from North America, and becomes extinct around the Pleistocene-Holocene boundary. The carbon and nitrogen stable isotopic values of collagen were measured for skeletal remains from Smilodon specimens ranging in age from 25 to 10 kyr BP, for the first time in the Pampas region of Argentina. By comparison with similar values obtained on co-eval predators such as Protocyon (large canid) and Panthera onca (jaguar) and a range of potential prey, such as giant ground sloths, glyptodontids, Macrauchenia, Toxodon, equids, cervids, and rodents, it could be established that Smilodon consumed essentially large prey from open landscape, such as Macrauchenia and giant ground sloths during the last 15,000 years of the Late Pleistocene in the Pampa region. It was possibly competing with the large canid Protocyon but the jaguar was apparently feeding on smaller size prey. A more humid climate at the beginning of the Holocene might have been unfavorable to this large predator and could have contributed to its extinction. These results also provide an important insight to understand the ecological processes involved in the Great American Biotic Interchange. (C) 2016 Elsevier B.V. All rights reserved.