DOI: 10.1016/j.quascirev.2014.04.028
Scopus记录号: 2-s2.0-84903650203
论文题名: Chronology and ancient feeding ecology of two upper Pleistocene megamammals from the Brazilian Intertropical Region
作者: De Melo França L. ; Trindade Dantas M.A. ; Bocchiglieri A. ; Cherckinsky A. ; de Souza Ribeiro A. ; Bocherens H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 99 起始页码: 78
结束页码: 83
语种: 英语
英文关键词: Carbon and oxygen isotopes
; Feeding paleoecology
; Megafauna
; Radiocarbon dating
Scopus关键词: Carbon
; Ecology
; Isotopes
; Nutrition
; Oxygen
; Plants (botany)
; Carbon and oxygen isotopes
; Chronological datum
; Herbaceous plants
; Late Pleistocene
; Megafauna
; Oxygen stable isotopes
; Paleoecology
; Radiocarbon dating
; Feeding
; carbon isotope
; chronology
; extinction
; feeding ecology
; fossil record
; mammal
; niche partitioning
; oxygen isotope
; paleoecology
; Pleistocene
; radiocarbon dating
; vegetation structure
; Brazil
英文摘要: In Brazilian Intertropical Region (BIR) fossil remains of the giant ground sloth Eremotherium laurillardi (Lund, 1842) and of the proboscidean Notiomastodon platensis (Ameghino, 1888) are the most abundant among megaherbivores. However, the paleoecology of both species needs to be better understood to enlighten why these species disappear in the end of the Pleistocene, an issue that is still debated. During the last decades, the carbon and oxygen stable isotopes have been increasingly being used to obtain paleoecological information about extinct animals, although this information is in most cases dissociated from chronological data. Thus, the main objective of this study is to contribute to the knowledge about feeding ecology and chronology of E.laurillardi and N.platensis within BIR. For each fossil sample we performed stable isotopes analyses (δ13C/δ18O) and radiocarbon dating (14C with AMS). The results showed that N.platensis occurred between 12,125 and 19,594calyr BP and exhibited a grazer diet (δ13C=-1.1‰-1.3‰), while E.laurillardi lived between 11,084 and 27,690calyr BP, with a mixed feeder diet (C3/C4 plants; values ratio δ13C=-7.7‰ to-3.3‰). The δ18O values of N.platensis ranged between 2.20‰ and 3.60‰, while the values of E.laurillardi ranged between-3.10‰ and-1.10‰. Neither species did exhibit differences in its diet through time, which suggests that the vegetational composition of this locality did not vary in the late Pleistocene. Both species were living in an open environment, rich in herbaceous plants (C4 plants) and with tree and shrub with disjoint distribution, maybe similar to some parts of recent Caatinga, where they have partitioned the spatial and feeding niches. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60195
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Programa de Pós-graduação em Ecologia e Conservação, Universidade Federal de Sergipe, São Cristovão, SE, Brazil; Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia - Campus Anísio Teixeira, Vitória da Conquista, Bahia, Brazil; Center for Applied Isotope Studies, University of Georgia, Athens, GA 30602, United States; Laboratório de Biologia da Conservação, DBI/CCBS, Universidade Federal de Sergipe, São Cristovão, SE, Brazil; Biogeology, Department of Geosciences, Senckenberg Center for Human Evolution and Palaeoenvironment (HEP), Universität Tübingen, Hölderlinstr. 12, 72074 Tübingen, Germany
Recommended Citation:
De Melo França L.,Trindade Dantas M.A.,Bocchiglieri A.,et al. Chronology and ancient feeding ecology of two upper Pleistocene megamammals from the Brazilian Intertropical Region[J]. Quaternary Science Reviews,2014-01-01,99