气候变化领域集成服务门户(CCPortal): Isotopic paleoecology (δ13C; δ18O) of Late Quaternary megafauna from Mato Grosso do Sul and Bahia States; Brazil

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DOI	10.1016/j.quascirev.2019.105864
	Isotopic paleoecology (δ13C; δ18O) of Late Quaternary megafauna from Mato Grosso do Sul and Bahia States; Brazil
	Pansani T.R.; Muniz F.P.; Cherkinsky A.; Pacheco M.L.A.F.; Dantas M.A.T.
发表日期	2019
ISSN	0277-3791
卷号	221
英文摘要	In the present study, the paleoecology (diet and niche width) of Late Quaternary megamammals that inhabited the Brazilian Intertropical Region (BIR) was assessed at two sites in the states of Bahia and Mato Grosso do Sul. The δ13C analyses suggest a generalist diet for Notiomastodon platensis, Palaeolama major, Holmesina paulacoutoi and Glyptotherium sp., while Equus neogeus was a grazer with a diet consisting exclusively of C4 grasses, and Eremotherium laurillard, a predominant browser with a diet consisting predominantly of C3 plants. A distinct diet pattern was inferred for one species: Toxodon platensis with a mixed-diet preferring C4 grasses in Mato Grosso do Sul but predominantly the C3 feeder in Bahia. These results show a high ecological plasticity of this species and may suggest distinct ecological pressures or different vegetation configurations in the two regions. Diet reconstitutions based on δ13C analyses suggest that an open savanna-like landscape predominated in both areas. The δ18O values reveal that Mato Grosso do Sul could have experienced wetter climatic conditions than Bahia during the Late Quaternary, suggesting a humid corridor in midwestern Brazil, or that there were different contents of δ18O of water sources between these areas. Hence, we assume that the same faunistic composition in different geographical areas is not enough to delimit the ecosystems of the BIR, and we recommend that the definitions of BIR should be revised to include more refined paleoclimate data. Other studies around the world should consider the same for delimitations of zoogeographic regions. © 2019 Elsevier Ltd
英文关键词	Brazilian Intertropical Region; Holocene; Niche width; Paleoclimatology; Pleistocene; South America; Stable isotopes
语种	英语
scopus关键词	Isotopes; Plants (botany); Brazilian Intertropical Region; Holocenes; Niche width; Paleoclimatology; Pleistocene; South America; Stable isotopes; Ecology; carbon isotope; food preference; fossil record; Holocene; isotopic composition; mammal; niche breadth; oxygen isotope; paleoclimate; paleoecology; phenotypic plasticity; Pleistocene; savanna; stable isotope; Brazil; Mato Grosso do Sul; Equus neogeus; Palaeolama; Poaceae
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/151788
作者单位	Programa de Pós-Graduação em Ecologia e Recursos Naturais, Universidade Federal de São Carlos, São Carlos, SP 13565-905, Brazil; Laboratório de Estudos Paleobiológicos, Departamento de Biologia, Universidade Federal de São Carlos, Sorocaba, SP 18052-780, Brazil; Laboratório de Paleontologia, Universidade de São Paulo, Ribeirão Preto, SP 14040-900, Brazil; Center for Applied Isotope Studies, University of Georgia, Athens, GA 30602, United States; Laboratório de Ecologia e Geociências, Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia – Campus Anísio Teixeira, Vitória da Conquista, BA 45029-094, Brazil
推荐引用方式 GB/T 7714	Pansani T.R.,Muniz F.P.,Cherkinsky A.,et al. Isotopic paleoecology (δ13C; δ18O) of Late Quaternary megafauna from Mato Grosso do Sul and Bahia States; Brazil[J],2019,221.
APA	Pansani T.R.,Muniz F.P.,Cherkinsky A.,Pacheco M.L.A.F.,&Dantas M.A.T..(2019).Isotopic paleoecology (δ13C; δ18O) of Late Quaternary megafauna from Mato Grosso do Sul and Bahia States; Brazil.Quaternary Science Reviews,221.
MLA	Pansani T.R.,et al."Isotopic paleoecology (δ13C; δ18O) of Late Quaternary megafauna from Mato Grosso do Sul and Bahia States; Brazil".Quaternary Science Reviews 221(2019).