Seasonal variations in diet (δ13C) and climate (δ18O) inferred through toxodonts enamel teeth during the Late Pleistocene in the brazilian intertropical region

被引：3
|
作者：
Gomes, Veronica Santos [1 ]
Lessa, Carlos Micael Bonfim [1 ]
de Oliveira, Gustavo Ribeiro [2 ]
Bantim, Renan Alfredo Machado [3 ]
Sayao, Juliana [4 ]
Bocherens, Herve [5 ,6 ]
de Araujo-Junior, Herminio Ismael [7 ]
Dantas, Mario Andre Trindade [1 ,8 ]
机构：
[1] Univ Estadual Sudoeste Bahia, Programa Pos Grad Genet Biodivers & Conservacao, Jequie, Ba, Brazil
[2] Univ Fed Rural Pernambuco, Dept Biol, Area Ecol, Recife, Pe, Brazil
[3] Univ Reg Cariri, Museu Paleontol Placido Cidade Nuvens, Santana Do Cariri, Ceara, Brazil
[4] Univ Fed Rio De Janeiro, Museu Nacl, Rio De Janeiro, Brazil
[5] Univ Tubingen, Dept Geosci, Biogeol, Holderlinstr 12, D-72074 Tubingen, Germany
[6] Univ Tubingen, Senckenberg Ctr Human Evolut & Palaeoenvironm S HE, Holderlinstr 12, D-72074 Tubingen, Germany
[7] Univ Estado Rio De Janeiro, Fac Geol, Dept Estratig & Paleontol, Rio De Janeiro, Brazil
[8] Univ Fed Bahia UFBA IMS CAT, Lab Ecol & Geociencias, Vitoria Da Conquista, Ba, Brazil
来源：
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES | 2023年 / 121卷
关键词：
Paleodiet; Paleoenvironment; Seasonality; Stable isotopes; Toxodontinae; ISOTOPIC PALEOECOLOGY; STABLE-ISOTOPES; HORSE EQUUS; CARBON; NICHE; HERBIVORES; MAMMALS;
D O I：
10.1016/j.jsames.2022.104148
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
To access the annual isotopic variation of Toxodon platensis Owen, 1837, tooth enamel samples found in tanks in two localities in the Brazilian Intertropical Region (Puxinana & SIM;, Paraiba and Caruaru, Pernamuco) was analyzed isotopically (513C, 518O). We suggest that one annual growth cycle of toxodonts could be represented by 11-17 mm of enamel. The carbon and oxygen isotopic values of the studied samples (LEG 2249-2253) are statistically different, interpreted as reflecting different climatic conditions in both localities. The interpretation of the carbon isotopic results shows little variation in the diet. The oxygen isotopic values of all samples represent the record of at least three years under different climate regimes. The carbon and oxygen isotopic values suggested that the feeding behaviour of these toxodonts were not influenced by the prevailing climatic conditions in both localities.
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页数：7
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