Pre-Columbian raised-field agriculture and land use in the Bolivian Amazon

Whitney, Bronwen, Dickau, Ruth, Mayle, Francis, Walker, John, Soto, J. Daniel and Iriarte, José (2014) Pre-Columbian raised-field agriculture and land use in the Bolivian Amazon. The Holocene, 24 (2). pp. 231-241. ISSN 0959-6836

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We present an integrated palaeoecological and archaeobotanical study of pre-Columbian raised-field agriculture in the Llanos de Moxos, a vast seasonally inundated forest–savanna mosaic in the Bolivian Amazon. Phytoliths from excavated raised-field soil units, together with pollen and charcoal in sediment cores from two oxbow lakes, were analysed to provide a history of land use and agriculture at the El Cerro raised-field site. The construction of raised fields involved the removal of savanna trees, and gallery forest was cleared from the area by AD 310. Despite the low fertility of Llanos de Moxos soils, we determined that pre-Columbian raised-field agriculture sufficiently improved soil conditions for maize cultivation. Fire was used as a common management practice until AD 1300, at which point, the land-use strategy shifted towards less frequent burning of savannas and raised fields. Alongside a reduction in the use of fire, sweet potato cultivation and the exploitation of Inga fruits formed part of a mixed resource strategy from AD 1300 to 1450. The pre-Columbian impact on the landscape began to lessen around AD 1450, as shown by an increase in savanna trees and gallery forest. Although agriculture at the site began to decline prior to European arrival, the abandonment of raised fields was protracted, with evidence of sweet potato cultivation occurring as late as AD 1800.

Item Type: Article
Uncontrolled Keywords: Amazonia, phytoliths, pollen, pre-Columbian archaeology, raised-field agriculture, tropical palaeoenvironments
Subjects: F800 Physical and Terrestrial Geographical and Environmental Sciences
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Bronwen Whitney
Date Deposited: 09 Jun 2015 08:19
Last Modified: 12 Oct 2019 22:55

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