DOI: 10.1016/j.palaeo.2016.08.036
论文题名: Dietary ecology of Pleistocene camelids: Influences of climate, environment, and sympatric taxa
作者: Yann L.T. ; DeSantis L.R.G. ; Koch P.L. ; Lundelius E.L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 461 起始页码: 389
结束页码: 400
语种: 英语
英文关键词: Camelid
; Dietary ecology
; Generalist
; Pleistocene
; Specialist
; Stable carbon isotopes
英文摘要: Wild members of Camelidae live in some of the most arid environments, including North Africa, Arabia, the Gobi Desert of China and Mongolia and high elevation environments in the Andes Mountains. A better understanding of the paleoecology of the three most abundant Pleistocene camelids (Camelops, Hemiauchenia, and Palaeolama) may clarify modern adaptations to arid environments. Mammalian tooth enamel δ13C values were used to compare diets of co-occurring species in California, Texas, and Florida and δ18O values were used to investigate climate. Carbon isotope analysis suggests Camelops was likely an opportunistic browser that consumed both C3 and C4 browse/CAM plants, potentially consuming C4 browse (e.g., saltbush). Hemiauchenia had an opportunistic and highly generalized diet, while Palaeolama was a specialized forest browser. Stable oxygen isotopes and aridity index values suggest that Ingleside was warmer than McKittrick Brea, but there are no significant differences in aridity between the two sites. Co-occurrence data from the Paleobiology Database suggest that Palaeolama was restricted to forested environments as it occurred with two browsers, Tapirus and Odocoileus, at 90.5% of all sites. Camelops and Hemiauchenia both co-occurred with a broader range of taxa, further suggesting these camelids lived in diverse habitats. The generalized diet of Hemiauchenia, the likely ancestor of modern South American camelids, allowed for the adaptations of extant Lama and Vicugna to survive in the arid environments of the Andes Mountains. Collectively, these data clarify the dietary ecology of extinct camelids and provide insight into the potential importance of generalist diets for increased resilience to changing environments and/or climates. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68235
Appears in Collections: 过去全球变化的重建
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作者单位: Vanderbilt University, Department of Earth and Environmental Sciences, PMB 351805, 2301 Vanderbilt Place, Nashville, TN, United States; University of California, Santa Cruz, Department of Earth and Planetary Sciences, 1156 High St, Santa Cruz, CA, United States; The University of Texas at Austin, Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States; Oklahoma State University Center for Health Sciences, Department of Anatomy and Cell Biology, 1111 W 17th Street, Tulsa, OK, United States
Recommended Citation:
Yann L.T.,DeSantis L.R.G.,Koch P.L.,et al. Dietary ecology of Pleistocene camelids: Influences of climate, environment, and sympatric taxa[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,461