Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks

Detalhes bibliográficos
Autor(a) principal: Avilla, Leonardo dos Santos
Data de Publicação: 2013
Outros Autores: Figueiredo, Ana Maria Graciano, Kinoshita, Angela, Machado, Cristina Bertoni, Mothé, Dimila, Asevedo, Lidiane, Baffa, Oswaldo, Dominato, Victor Hugo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13780
Resumo: Texto completo. Acesso restrito. p. 85–90
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spelling Avilla, Leonardo dos SantosFigueiredo, Ana Maria GracianoKinoshita, AngelaMachado, Cristina BertoniMothé, DimilaAsevedo, LidianeBaffa, OswaldoDominato, Victor HugoAvilla, Leonardo dos SantosFigueiredo, Ana Maria GracianoKinoshita, AngelaMachado, Cristina BertoniMothé, DimilaAsevedo, LidianeBaffa, OswaldoDominato, Victor Hugo2013-11-19T20:28:11Z20131040-6182http://repositorio.ufba.br/ri/handle/ri/13780v. 305Texto completo. Acesso restrito. p. 85–90During the Quaternary in South America, the gomphotheres were one of the most common elements in the mammal megafauna. They went extinct in an evolutionary event known as the Late-Pleistocene Megafaunal Extinction, of which climate changes and human hunting are commonly claimed as the main possible causes. Most of the Brazilian Pleistocene fossil mammals did not preserve collagen, so alternative dating techniques are needed. In this case, the only option for dating such fossils is via Electron Spin Resonance (ESR) dating. The aim of this paper is (i) to place the Quaternary Águas de Araxá’s Notiomastodon platensis population in a chronological context through ESR dating and, (ii) to investigate its paleoenvironmental context and extinction causes. The ESR analysis was made on both crushed tooth enamel and sediment from the study area. They were subjected to Neutron Activation Analysis to determine the concentration of U, Th and K. The ESR dating indicated an age somewhere between 60,000 and 55,000 a for this N. platensis population (Lujanian, the last age of the Late Pleistocene South American Land Mammal Ages – SALMA). The date found for these gomphotheres is included in the Middle Pleniglacial, which is characterized by a cold and arid climate. Previous paleodiet studies suggest that the feeding habits of those individuals were basically opportunistic/generalist herbivores (C3 grasses and woody plants). Taphonomically, it was observed that the gomphotheres carcasses were transported by a high-energy water stream, typical of fluvial systems, and that the large amount of individuals in the fossil record is due to a mass death event related to a dry period. Based on taphonomical, paleoecological and chronological evidence, it is possible to assume that the gomphothere population from the Quaternary of Águas de Araxá is probably an example of individuals that suffered from climate changes during the Late Pleistocene in South America.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-10-09T20:05:08Z No. of bitstreams: 1 66666666666666666.pdf: 902105 bytes, checksum: cf0f7a689a9085d22dd5c9e0ed313e81 (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-11-19T20:28:11Z (GMT) No. of bitstreams: 1 66666666666666666.pdf: 902105 bytes, checksum: cf0f7a689a9085d22dd5c9e0ed313e81 (MD5)Made available in DSpace on 2013-11-19T20:28:11Z (GMT). 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dc.title.pt_BR.fl_str_mv Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
dc.title.alternative.pt_BR.fl_str_mv Quaternary International
title Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
spellingShingle Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
Avilla, Leonardo dos Santos
title_short Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
title_full Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
title_fullStr Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
title_full_unstemmed Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
title_sort Extinction of a gomphothere population from Southeastern Brazil: Taphonomic, paleoecological and chronological remarks
author Avilla, Leonardo dos Santos
author_facet Avilla, Leonardo dos Santos
Figueiredo, Ana Maria Graciano
Kinoshita, Angela
Machado, Cristina Bertoni
Mothé, Dimila
Asevedo, Lidiane
Baffa, Oswaldo
Dominato, Victor Hugo
author_role author
author2 Figueiredo, Ana Maria Graciano
Kinoshita, Angela
Machado, Cristina Bertoni
Mothé, Dimila
Asevedo, Lidiane
Baffa, Oswaldo
Dominato, Victor Hugo
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Avilla, Leonardo dos Santos
Figueiredo, Ana Maria Graciano
Kinoshita, Angela
Machado, Cristina Bertoni
Mothé, Dimila
Asevedo, Lidiane
Baffa, Oswaldo
Dominato, Victor Hugo
Avilla, Leonardo dos Santos
Figueiredo, Ana Maria Graciano
Kinoshita, Angela
Machado, Cristina Bertoni
Mothé, Dimila
Asevedo, Lidiane
Baffa, Oswaldo
Dominato, Victor Hugo
description Texto completo. Acesso restrito. p. 85–90
publishDate 2013
dc.date.accessioned.fl_str_mv 2013-11-19T20:28:11Z
dc.date.issued.fl_str_mv 2013
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/13780
dc.identifier.issn.none.fl_str_mv 1040-6182
dc.identifier.number.pt_BR.fl_str_mv v. 305
identifier_str_mv 1040-6182
v. 305
url http://repositorio.ufba.br/ri/handle/ri/13780
dc.language.iso.fl_str_mv eng
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Quaternary International
publisher.none.fl_str_mv Quaternary International
dc.source.pt_BR.fl_str_mv http://www.sciencedirect.com/science/article/pii/S1040618212031886
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