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| DOI | 10.1016/j.quascirev.2020.106284 |
| Enamel isotopes reveal late Pleistocene ecosystem dynamics in southeastern North America | |
| Noble E.J.; McManus J.G.; Mead A.J.; Mead H.; Seminack C.; Balco W.; Bennett T.; Crain N.M.; Duckworth C.; Malasek T.; Pearson J.Z.; Rhinehart P.; Ussery M.E.; Sun Y.; Patterson J.R.; Patterson D.B. | |
| 发表日期 | 2020 |
| ISSN | 0277-3791 |
| 卷号 | 236 |
| 英文摘要 | The end of the late Pleistocene (∼10,000 years ago) witnessed the extinction of over seventy percent of North America's megafaunal genera. Although this pattern has been extensively investigated, its causal mechanisms remain elusive. Much of this difficulty is related to the spatial and temporal discontinuity of sites dating to the period leading up to the extinctions. In this study, we present new stable carbon and oxygen isotope data from Mammuthus columbi and Bison latifrons teeth collected from a well-dated Last Glacial Maximum (∼20,000 rcybp) locality called Clark Quarry in coastal Georgia, USA. This site lies in direct proximity to where Sir Charles Lyell collected the type specimen of M. columbi in 1846 and therefore is of added historical significance. We compare these data to those from similarly aged (Sangamonian interglacial and Wisconsin glacial intervals) localities from Florida and demonstrate the presence of a vegetation gradient with elevated levels of C3 vegetation at higher latitudes. Serially-sampled δ13C and δ18O values suggest that Clark Quarry Mammuthus and Bison changed their diet seasonally with the incorporation of elevated quantities of C4 vegetation during warmer periods. Our data indicate more exaggerated seasonal dietary variability in these taxa at Clark Quarry relative to those collected from the Sangamonian interglacial locality of Waccasassa River in Florida, providing additional evidence for the significant influence of glacial dynamics in structuring North American ecosystems. These high-resolution ecological patterns should be incorporated into hypotheses focused on extinction dynamics in southeastern North America and more broadly. © 2020 Elsevier Ltd |
| 英文关键词 | Bison; Diet; Georgia; Mammuthus; Pleistocene; Stable isotopes |
| 语种 | 英语 |
| scopus关键词 | Dynamics; Glacial geology; Isotopes; Quarries; Vegetation; Ecosystem dynamics; Elevated level; High resolution; Higher latitudes; Last Glacial Maximum; Late Pleistocene; North American; Stable carbon; Ecosystems; biostratigraphy; C4 plant; discontinuity; ecosystem dynamics; enamel; interglacial; Last Glacial Maximum; oxygen isotope; paleobiogeography; type specimen; vegetation cover; Florida [United States]; Georgia; United States; Wisconsin; Bison; Mammuthus; Mammuthus columbi |
| 来源期刊 | Quaternary Science Reviews
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/151487 |
| 作者单位 | Department of Biology, University of North Georgia, Dahlonega, GA, United States; Department of Biological and Environmental Sciences, Georgia College & State University, Milledgeville, GA, United States; Lewis Rogers Institute of Environmental and Spatial Analyses, University of North Georgia, United States; Department of History, Anthropology and Philosophy, University of North Georgia, United States; Center for the Advanced Study Human Paleobiology, The George Washington University, Washington, DC, United States |
| 推荐引用方式 GB/T 7714 | Noble E.J.,McManus J.G.,Mead A.J.,et al. Enamel isotopes reveal late Pleistocene ecosystem dynamics in southeastern North America[J],2020,236. |
| APA | Noble E.J..,McManus J.G..,Mead A.J..,Mead H..,Seminack C..,...&Patterson D.B..(2020).Enamel isotopes reveal late Pleistocene ecosystem dynamics in southeastern North America.Quaternary Science Reviews,236. |
| MLA | Noble E.J.,et al."Enamel isotopes reveal late Pleistocene ecosystem dynamics in southeastern North America".Quaternary Science Reviews 236(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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