Paleoecologia isotópica (δ13C, δ18O) de mamíferos do Pleistoceno final–Holoceno de Ituaçu, Bahia, Brasil

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Revista Brasileira De Paleontologia Pub Date : 2023-07-16 DOI:10.4072/rbp.2023.2.05

Ronaldo Araujo Leoni, M. Dantas, A. Cherkinsky, Laís Alves-Silva

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Abstract

Isotopic paleoecology (δ13c, δ18o) of mammals from the late Pleistocene–Holocene of Ituaçu, Bahia, Brazil. In this paper, the isotopic paleoecology (δ13C, δ18O) of fossils of the mammals Alouatta sp., Cebus sp., Myocastor coypus, Dicotyles tajacu, Tamandua tetradactyla, and Tapirus terrestris collected in Lapa do Bode cave, Ituaçu Municipality, State of Bahia, is described. Radiocarbon ages of 6,480–6,653 Cal yr. BP (14C collagen = 5,790±25 years) were obtained for T. tetradactyla and 27,798–28,221 Cal yr. BP (14C collagen = 23,950±50 years) for M. coypus. The herbivore taxa (T. terrestris, δ13C = -14.9 ‰; Alouatta sp., δ13C = -13.0 ‰; M. coypus, δ13C = -12.7 ‰) had a diet composed mainly of C3 plants (piC3< 80%), indicating forested environment, a similar interpretation also suggested from other taxa that ingested >60% C3 plants such as Cebus sp. (δ13C = -13.1 ‰); D. tajacu (δ13C = -9.7 ‰; T. tetradactyla, δ13C = -11.0 ‰), allowing to suggest that these taxa lived in low-density forests and arboreal savanna habitats. Keywords: caves, paleodiet, carbon isotopes, oxygen isotopes.

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巴西巴伊亚伊图阿苏更新世-全新世哺乳动物的同位素古生态学（δ13C，δ18O）

巴西巴伊亚伊图阿苏更新世晚期至全新世哺乳动物的同位素古生态学（δ13c，δ18o）。本文介绍了在巴伊亚州伊图阿苏市拉帕多博德洞穴采集的哺乳动物Alouatta sp.、Cebus sp.、Myocacastor coypus、Dicotyles tajacu、Tamandua tetractyla和Tapirus terrestris化石的同位素古生态学（δ13C，δ18O）。四趾T.coypus的放射性碳年龄为6480–6653 Cal yr.BP（14C胶原蛋白=5790±25年），而M.coypus为27798–28221 Cal yr.BP（14C-胶原蛋白=23950±50年）。食草动物类群（T.terrestris，δ13C=-14.9‰；Alouatta sp.，δ13C=-13.0‰；M.coypus，δ13C=-12.7‰）的饮食主要由C3植物组成（piC3＜80%），表明森林环境，其他摄入>60%C3植物的类群也提出了类似的解释，如Cebus sp.（δ13C=-13.1‰）；D.tajacu（δ13C=-9.7‰；T.tetractyla，δ13C=-11.0‰），这表明这些分类群生活在低密度森林和树栖稀树草原栖息地。关键词：洞穴，古饮食，碳同位素，氧同位素。

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来源期刊

Revista Brasileira De Paleontologia PALEONTOLOGY-

CiteScore

1.60

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： It publishes original contributions on all aspects of Paleontology. Papers are written in English, Spanish, or Portuguese and are reviewed by international experts.