Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction

The present study reconstructs Holocene fluvial dynamics in the southern Amazonian foreland basin through the analysis of 36 stratigraphic profiles taken along a 300 km long transect across the Llanos de Moxos (LM), in the Bolivian Amazon. Based on 50 radiocarbon ages from paleosols intercalated wit...

Descripción completa

Detalles Bibliográficos
Autores: Lombardo, Umberto, Rodrigues, Leonor, Veit, Heinz
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Universitat Pompeu Fabra
Repositorio:Repositorio Digital de la UPF
OAI Identifier:oai:repositori.upf.edu:10230/35478
Acceso en línea:http://hdl.handle.net/10230/35478
http://dx.doi.org/10.1016/j.quascirev.2017.11.026
Access Level:acceso abierto
Palabra clave:Holocene
Paleogeography
South America
Amazonia
Paleosol
Human-environment interactions
Rivers
id ES_90e0bced9d9455e6bc5f77bb8879a38d
oai_identifier_str oai:repositori.upf.edu:10230/35478
network_acronym_str ES
network_name_str España
repository_id_str
spelling Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstructionLombardo, UmbertoRodrigues, LeonorVeit, HeinzHolocenePaleogeographySouth AmericaAmazoniaPaleosolHuman-environment interactionsRiversThe present study reconstructs Holocene fluvial dynamics in the southern Amazonian foreland basin through the analysis of 36 stratigraphic profiles taken along a 300 km long transect across the Llanos de Moxos (LM), in the Bolivian Amazon. Based on 50 radiocarbon ages from paleosols intercalated with fluvial sediments, the most important changes in floodplain dynamics on a millennial scale are reconstructed and the links between pre-Columbian cultural processes and environmental change in the region explored. Results show that the frequency of river avulsions and crevasses, as inferred from the number and age of the cored paleosols, is stable from 8k cal. yrs BP to 4k cal. yrs BP and increases significantly from 4k to 2k cal. yrs BP, following the strengthening of el Niño/la Niña cycle and an increase in average precipitation. Fluvial activity then decreases and reaches its minimum after 2k cal BP. A comparison between the stratigraphic record and the archaeological record shows a match between periods of landscape stability in SW Amazonia (low river activity) and periods of pre-Columbian human occupation. The first Amazonians lived in the LM until 4k yrs. BP, when an abrupt increase in the frequency of river avulsions and crevasses forced the abandonment of the region. After two thousand years of archaeological hiatus, which matches the period of highest river activity in the region, agriculturists reoccupied the Bolivian Amazon.This work was supported by the Swiss National Science Foundation (SNSF) [grants no P300P2158459/1, 200020-141277/1, and 200021-122289] and by the European Union's Horizon 2020 research and innovation programme [Marie Skłodowska-Curie actions, EU project 703045].Elsevier20182018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/10230/35478http://dx.doi.org/10.1016/j.quascirev.2017.11.026reponame:Repositorio Digital de la UPFinstname:Universitat Pompeu FabraInglésQuaternary Science Reviews. 2018;180:30-41.info:eu-repo/grantAgreement/EC/H2020/703045© Elsevier http://dx.doi.org/10.1016/j.quascirev.2017.11.026info:eu-repo/semantics/openAccessoai:repositori.upf.edu:10230/354782026-06-12T07:21:37Z
dc.title.none.fl_str_mv Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
title Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
spellingShingle Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
Lombardo, Umberto
Holocene
Paleogeography
South America
Amazonia
Paleosol
Human-environment interactions
Rivers
title_short Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
title_full Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
title_fullStr Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
title_full_unstemmed Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
title_sort Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: a paleosol-based reconstruction
dc.creator.none.fl_str_mv Lombardo, Umberto
Rodrigues, Leonor
Veit, Heinz
author Lombardo, Umberto
author_facet Lombardo, Umberto
Rodrigues, Leonor
Veit, Heinz
author_role author
author2 Rodrigues, Leonor
Veit, Heinz
author2_role author
author
dc.subject.none.fl_str_mv Holocene
Paleogeography
South America
Amazonia
Paleosol
Human-environment interactions
Rivers
topic Holocene
Paleogeography
South America
Amazonia
Paleosol
Human-environment interactions
Rivers
description The present study reconstructs Holocene fluvial dynamics in the southern Amazonian foreland basin through the analysis of 36 stratigraphic profiles taken along a 300 km long transect across the Llanos de Moxos (LM), in the Bolivian Amazon. Based on 50 radiocarbon ages from paleosols intercalated with fluvial sediments, the most important changes in floodplain dynamics on a millennial scale are reconstructed and the links between pre-Columbian cultural processes and environmental change in the region explored. Results show that the frequency of river avulsions and crevasses, as inferred from the number and age of the cored paleosols, is stable from 8k cal. yrs BP to 4k cal. yrs BP and increases significantly from 4k to 2k cal. yrs BP, following the strengthening of el Niño/la Niña cycle and an increase in average precipitation. Fluvial activity then decreases and reaches its minimum after 2k cal BP. A comparison between the stratigraphic record and the archaeological record shows a match between periods of landscape stability in SW Amazonia (low river activity) and periods of pre-Columbian human occupation. The first Amazonians lived in the LM until 4k yrs. BP, when an abrupt increase in the frequency of river avulsions and crevasses forced the abandonment of the region. After two thousand years of archaeological hiatus, which matches the period of highest river activity in the region, agriculturists reoccupied the Bolivian Amazon.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10230/35478
http://dx.doi.org/10.1016/j.quascirev.2017.11.026
url http://hdl.handle.net/10230/35478
http://dx.doi.org/10.1016/j.quascirev.2017.11.026
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Quaternary Science Reviews. 2018;180:30-41.
info:eu-repo/grantAgreement/EC/H2020/703045
dc.rights.none.fl_str_mv © Elsevier http://dx.doi.org/10.1016/j.quascirev.2017.11.026
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © Elsevier http://dx.doi.org/10.1016/j.quascirev.2017.11.026
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositorio Digital de la UPF
instname:Universitat Pompeu Fabra
instname_str Universitat Pompeu Fabra
reponame_str Repositorio Digital de la UPF
collection Repositorio Digital de la UPF
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869413344392249344
score 15,811543

Similares en LA Referencia