气候变化领域集成服务门户(CCPortal): Influences of dietary niche expansion and Pliocene environmental changes on the origins of stone tool making

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DOI	10.1016/j.palaeo.2020.110074
	Influences of dietary niche expansion and Pliocene environmental changes on the origins of stone tool making
	Quinn R.L.; Lewis J.; Brugal J.-P.; Lepre C.J.; Trifonov A.; Harmand S.
发表日期	2020
ISSN	0031-0182
英文摘要	The world's oldest known stone tools discovered at the Pliocene site of Lomekwi 3 (LOM3) in the Nachukui Formation, northern Kenya, signals a prodigious behavioral change in the hominin lineage. LOM3, dated to 3.3 Ma, is significantly earlier than the first appearance of genus Homo and coincides with the onset of the Mid-Pliocene Warm Period, warranting new phylogenetic and environmental explanations for the origins of hominin stone tool making behaviors. Here we examined Pliocene paleoenvironments (4.3–3.0 Ma) within the Omo-Turkana Depression (OTD) with paleosol pedogenic carbonate (PC) and faunal enamel carbonate (EC) δ13C and δ18O values. Amidst the gradual shift toward grassier environments, intranodular δ13CPC and δ18OPC variation slightly increased through time. Three of fourteen ungulate herbivore taxa yielded statistically significant increases in δ13CEC values. When all ungulate herbivore δ13CEC values are grouped by feeding categories (C3-browsers, C3-C4-mixed feeders, C4-grazers) there is evidence that the C3-C4-mixed feeding niche contracted and shifted toward the C4-grazing niche as hominins expanded their dietary breadth during the middle Pliocene. Only one of nine taxa showed a significant decrease in δ18OEC values across the study interval. Abrupt, significant environmental perturbations are not evident during LOM3 times in the OTD, casting doubt on variability selection or pulsed humidity as selective forces for middle Pliocene technological innovations. We propose that a long-term feedback system involving gradual environmental changes and biotic dietary competition influenced a suite of hominin adaptations to a broad dietary niche, culminating in the origins of stone tool making behaviors. © 2020 Elsevier B.V.
英文关键词	Enamel isotopes; Lomekwi 3 archaeological site; Omo-Turkana Depression; Paleosol isotopes; Pliocene climate
语种	英语
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/150715
作者单位	Department of Sociology, Anthropology, Social Work and Criminal Justice, Seton Hall University, 400 South Orange Ave, South Orange, NJ 07079, United States; Department of Earth and Planetary Sciences, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854, United States; Turkana Basin Institute and Department of Anthropology, Stony Brook University, Stony Brook, NY 11794-4364, United States; Aix Marseille Université, CNRS, Minist. Cult., UMR 7269 LAMPEA, Maison Méditerranéenne des Sciences de l'Homme, 5 rue du Château de l'Horloge, BP 647, Aix-en-Provence Cedex 2, F-13094, France; CNRS, UMR 7055, Préhistoire et Technologie, Université Paris Ouest Nanterre La Défense, 21 allée de l'Université, Nanterre Cedex, 92023, France; Institut Français de Recherche en Afrique (IFRA), UMIFRE, USR 3336, CNRS, Laikipia Road, Kileleshwa, Nairobi, Kenya
推荐引用方式 GB/T 7714	Quinn R.L.,Lewis J.,Brugal J.-P.,et al. Influences of dietary niche expansion and Pliocene environmental changes on the origins of stone tool making[J],2020.
APA	Quinn R.L.,Lewis J.,Brugal J.-P.,Lepre C.J.,Trifonov A.,&Harmand S..(2020).Influences of dietary niche expansion and Pliocene environmental changes on the origins of stone tool making.Palaeogeography, Palaeoclimatology, Palaeoecology.
MLA	Quinn R.L.,et al."Influences of dietary niche expansion and Pliocene environmental changes on the origins of stone tool making".Palaeogeography, Palaeoclimatology, Palaeoecology (2020).