Título:	Amazonian dark earths in the fertile floodplains of the Amazon River, Brazil: an example of non-intentional formation of anthropic soils in the Central Amazon region.
Autor:	MACEDO, R. S. TEIXEIRA, W. G. LIMA, H. N. SOUZA, A. C. G. de SIVA, F. W. R. ENCINAS, O. C. NEVES, E. G.
Afiliación:	RODRIGO SANTANA MACEDO, INSTITUTO NACIONAL DO SEMIÁRIDO; WENCESLAU GERALDES TEIXEIRA, CNPS; HEDINALDO NARCISO LIMA, UFAM; ADRIANA COSTA GIL DE SOUZA, UFAM; FRANCISCO WELITON ROCHA SILVA, UFAM; OMAR CUBAS ENCINAS, UFAM; EDUARDO GÓES NEVES, MUSEU DE ARQUEOLOGIA E ETNOLOGIA DA UNIVERSIDADE DE SÃO PAULO.
Año:	2019
Referencia:	Boletim do Museu Paraense Emílio Goeldi: Ciências Humanas, v. 14, n. 1, p. 207-227, jan./abr. 2019.
Descripción:	Amazonian dark earths (ADEs) are fertile soils created by pre-Columbian Amerindian societies of the Amazon Basin. However, it is still not clear whether these soils were produced intentionally to improve infertile Amazonian upland soils or if they resulted from the accumulation of organic matter from sedentary settlements. This study characterizes the ADEs found in the naturally fertile alluvial floodplains of the Amazon River in the Central Brazilian Amazon according to total, exchangeable, and available contents of elements and organic carbon in soil profiles. ADEs contained higher levels of available elements and total P, Ca, Zn, and Cu. High total Cr, Ni, Co, and V content in these soils indicate that mafic minerals contributed to their composition, while higher contents of P, Zn, Ba, and Sr indicate anthropic enrichment. The presence of ADEs in floodplain areas strongly indicates non-intentional anthropic fertilization of the alluvial soils, which naturally contain levels of P, Ca, Zn, and Cu higher than those needed to cultivate common plants. The presence of archaeological sites in the floodplains also shows that pre-Columbian populations lived in these regions as well as on bluffs above the Amazon River.
NAL Thesaurus:	Gleysols Anthrosols Archaeology Amazonia
Palabras clave:	Gleissolos Arqueologia amazônica Antrossolos
DOI:	https://doi.org/10.1590/1981-81222019000100013
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPS)