Estudos isotópicos da dieta Guarani e a cadeia trófica associada à bacia do rio Taquari, Rio Grande do Sul

CARBONERA, M; SCHNEIDER, FERNANDA; MACHADO, TRESINHA; DANIEL LOPONTE

Revista de Antropologia del Museo de Entre Ríos

Secretaria de cultura de la provincia de Entre Rios

Lugar: paraná; Año: 2022 vol. 7 p. 30 - 44

In this study we present the results of isotopic analysis (δ13C, δ15N y δ18O) of human and faunal bones recoveredin Guarani archaeological sites located in the rainforest of the center of the state of Rio Grande do Sul (Brazil). Theisotopic values obtained in prey reflect a predominantly C3 or monoisotopic C3 pattern, both among herbivores andterrestrial omnivores, while a mixed pattern is observed for fish. The values of the spacing of the carbon sourcesand the values of δ15N reflect differences between each respective guild, which are within expected values. Humanshave a diet based mostly based on C3 proteins and minor contribution of C4 proteins, with a significant intake ofC4 carbohydrates, which, given the archaeological context, must correspond to the consumption of maize. Theisotopic values of the diet of humans are equivalent to those observed in other individuals recovered at sites ofthis archaeological unit, located in other regions of Brazil as well as in Argentina and Paraguay. The results obtainedin oxygen-18 are those expected for the region east of the Uruguay River, whose surface water comes from theprecipitation of the Intertropical Convergence Zone and the South Atlantic Convergence Zone.