气候变化领域集成服务门户(CCPortal): Pleistocene paleoecology and feeding behavior of terrestrial vertebrates recorded in a pre-LGM asphaltic deposit at Rancho La Brea; California

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DOI	10.1016/j.palaeo.2019.109383
	Pleistocene paleoecology and feeding behavior of terrestrial vertebrates recorded in a pre-LGM asphaltic deposit at Rancho La Brea; California
	Fuller B.T.; Southon J.R.; Fahrni S.M.; Farrell A.B.; Takeuchi G.T.; Nehlich O.; Guiry E.J.; Richards M.P.; Lindsey E.L.; Harris J.M.
发表日期	2020
ISSN	0031-0182
卷号	537
英文摘要	Sixteen taxa comprising extinct megafauna and extant species from a single asphalt deposit (Project 23, Deposit 1) at Rancho La Brea were isotopically analyzed (δ13C, δ15N, δ34S) and 14C dated to investigate paleoecology and feeding behavior of terrestrial vertebrates in southern California during the late Pleistocene. The large majority of the 14C dates cluster between ~35 and 36 kyr BP, but a range of ages indicate this seep was active from ~30 to >43 kyr BP. Many of the Smilodon fatalis and Canis dirus as well as the Canis latrans have similar δ13C (~–19‰ to −18‰) and δ15N (~11‰ to 12‰) results, indicating that these predators may have consumed similar prey species and possibly competed with each other through hunting and/or scavenging. The remains of contemporary potential prey species for these three predators include juvenile Bison antiquus and Camelops hesternus, and possibly adult Paramylodon harlani and Capromeryx minor. However, the δ15N results of a single C. dirus (8.9‰) and the Panthera atrox (8.3‰) were significantly lower than the other large predators. Potential prey for this dire wolf and lion include Nothrotheriops shastensis, Equus occidentalis and possibly Mammut americanum. Many of the herbivores appear to have utilized broadly similar C3 ecological environments. However, the adult E. occidentalis had isotopic results similar to the Sylvilagus sp. and Spermophilus beecheyi that have restricted home ranges, suggesting this horse was similarly local in its distribution or consumed a similar plant food selection. The isotopic values for extant taxa (Actinemys marmorata, Crotalus sp., Mustela frenata) suggest similar dietary patterns to their modern counterparts, indicating their ecological niches have remained relatively constant. The results presented here establish a foundation for future diachronic studies to better understand how the climate of the last ~50 kyr BP impacted biodiversity and ecological communities in southern California. © 2019 Elsevier B.V.
英文关键词	Climate change; Extinction; Megafauna; Radiocarbon dating; Stable isotopes
语种	英语
scopus关键词	asphalt; extinction risk; feeding behavior; horse; hunting; juvenile; Last Glacial Maximum; paleoecology; paleogeography; Pleistocene; radiocarbon dating; stable isotope; terrestrial environment; California; Rancho La Brea; United States; Actinemys marmorata; Bison antiquus; Canis dirus; Canis latrans; Crotalus; Equidae; Equus; Mammut americanum; Mustela frenata; Nothrotheriops shastensis; Panthera atrox; Smilodon fatalis; Spermophilus beecheyi; Sylvilagus sp.; Vertebrata
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150738
作者单位	Department of Earth System Science, University of California, Irvine, Keck CCAMS Group, B321 Croul Hall, Irvine, CA 92697, United States; La Brea Tar Pits and Museum, 5801 Wilshire Boulevard, Los Angeles, CA 90036, United States; Department of Archaeology and Heritage Studies, School of Culture and Society, Aarhus University, Højbjerg, DK-8270, Denmark; Department of Anthropology, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada; Department of Archaeology, Simon Fraser University, Burnaby, British Columbia V5W 1S6, Canada
推荐引用方式 GB/T 7714	Fuller B.T.,Southon J.R.,Fahrni S.M.,et al. Pleistocene paleoecology and feeding behavior of terrestrial vertebrates recorded in a pre-LGM asphaltic deposit at Rancho La Brea; California[J],2020,537.
APA	Fuller B.T..,Southon J.R..,Fahrni S.M..,Farrell A.B..,Takeuchi G.T..,...&Harris J.M..(2020).Pleistocene paleoecology and feeding behavior of terrestrial vertebrates recorded in a pre-LGM asphaltic deposit at Rancho La Brea; California.Palaeogeography, Palaeoclimatology, Palaeoecology,537.
MLA	Fuller B.T.,et al."Pleistocene paleoecology and feeding behavior of terrestrial vertebrates recorded in a pre-LGM asphaltic deposit at Rancho La Brea; California".Palaeogeography, Palaeoclimatology, Palaeoecology 537(2020).