globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.06.030
Scopus记录号: 2-s2.0-85021746144
论文题名:
Isotopic paleoecology of the Pleistocene megamammals from the Brazilian Intertropical Region: Feeding ecology (δ13C), niche breadth and overlap
作者: Dantas M.A.T.; Cherkinsky A.; Bocherens H.; Drefahl M.; Bernardes C.; França L.D.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 170
起始页码: 152
结束页码: 163
语种: 英语
Scopus关键词: Feeding ; Isotopes ; Body weight ; C4 plant ; Feeding ecology ; Late Pleistocene ; Paleoecology ; Platensis ; Pleistocene ; Ecology ; carbon isotope ; feeding ecology ; mammal ; niche breadth ; niche overlap ; oxygen isotope ; paleoecology ; Pleistocene ; Brazil ; Equus
英文摘要: The extinct megamammals Eremotherium laurillardi (weight 6550 kg), Notiomastodon platensis (w = 6000 kg), Toxodon platensis (w = 3090 kg), Valgipes bucklandi (w = 980 kg) and Equus (Amerhippus) neogaeus (w = 370 kg) are recorded for the late Pleistocene of the Brazilian Intertropical Region. In order to evaluate the isotopic paleoecology (feeding diet, niche breadth and overlap) of these species, 14C dates, δ13C and δ18O analyzes were performed. Our results suggest that E. laurillardi (μδ13C = −4.35 ± 2.87‰ μBA = 0.77 ± 0.25), T. platensis (μδ13C = −5.74 ± 4.80‰ μBA = 0.57 ± 0.40) and N. platensis (μδ13C = −1.17 ± 2.76‰ μBA = 0.56 ± 0.20) were mixed feeders with a wide niche breadth, while E. (A.) neogaeus (μδ13C = 0.73 ± 1.19‰ μBA = 0.38 ± 0.22) was a grazer, and V. bucklandi (δ13C = −10.17‰ BA = 0.13) was a specialist browser. A narrow niche overlap occurred between V. bucklandi and the species that fed principally on C4 plants (>70%; O = 0.24–0.43). In contrast, there was a high niche overlap between E. neogaeus and N. platensis (O = 0.75) and between E. laurillardi and T. platensis (O = 0.86). Therefore, E. laurillardi was probably a key species in this Pleistocene community due to its high body weight and wide niche breadth, suggesting that E. laurillardi was a great competitor for resources in the BIR. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59150
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作者单位: Laboratório de Ecologia e Geociências, Instituto Multidisciplinar Em Saúde, Universidade Federal da Bahia – Campus Anísio Teixeira, Rua Rio de Contas, 58, Candeias, Vitória da Conquista, BA, Brazil; Center for Applied Isotope Studies, University of Georgia, Athens, GA, United States; Biogeology, Department of Geosciences and Senckenberg Center for Human Evolution and Palaeoenvironment (HEP), Universität Tübingen, Hölderlinstr. 12, Tübingen, Germany; Grupo de Estudos de Paleovertebrados, Universidade Federal da Bahia, Salvador, BA, Brazil; Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil; Programa de Pós-graduação Em Ecologia e Conservação, Universidade Federal de Sergipe, São Cristovão, SE, Brazil

Recommended Citation:
Dantas M.A.T.,Cherkinsky A.,Bocherens H.,et al. Isotopic paleoecology of the Pleistocene megamammals from the Brazilian Intertropical Region: Feeding ecology (δ13C), niche breadth and overlap[J]. Quaternary Science Reviews,2017-01-01,170
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