Holocene history of a lake filling and vegetation dynamics of the Serra Sul dos Carajás, southeast Amazonia

dc.citation.volume91
dc.creatorGUIMARÃES, José Tasso Felix
dc.creatorSAHOO, Prafulla Kumar
dc.creatorSOUZA FILHO, Pedro Walfir Martins e
dc.creatorFIGUEIREDO, Mariana Maha Jana Costa de
dc.creatorREIS, Luiza Santos
dc.creatorRODRIGUES, Tarcísio Magevski
dc.creatorSILVA, Marcio da Silva
dc.creator.Latteshttp://lattes.cnpq.br/9602707802326509pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/1446331159375363pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/3282736820907252pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/3920709080333560pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/0868277316680639pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/9030508521551123pt_BR
dc.date.accessioned2019-04-03T17:46:03Z
dc.date.available2019-04-03T17:46:03Z
dc.date.issued2017-08-24
dc.description.abstractDown-core changes in sedimentary facies, elemental geochemistry, pollen, spore, δ13C, δ15N and radiocarbon records from a filled lake, named R4, of the Serra Sul dos Carajás were used to study the relationship between the paleomorphological and paleoecological processes and their significance for Holocene paleoclimatology of the southeast Amazonia. The sediment deposition of the R4 lake started around 9500 cal yr BP. Increase of detrital components from 9500 to 7000 cal yr BP suggests high weathering of surrounding catchment rocks and soils, and deposition into the lake basin under mudflows. At that time, montane savanna and forest formation were already established suggesting predominance of wet climate. However, from 7000 to 3000 cal yr BP, a decline of detrital input occurred. Also, forest formation and pteridophytes were declined, while palms and macrophytes were remained relatively stable, indicating that water levels of the lake is likely dropped allowing the development of plants adapted to subaerial condition under drier climate conditions. After 3000 cal yr BP, eutrophication and low accommodation space lead to high lake productivity and the final stage of the lake filling respectively, and forest formation may has acquired its current structure, which suggests return of wetter climate conditions.en
dc.description.affiliationSOUZA FILHO, P. W. M. Universidade Federal do Parápt_BR
dc.identifier.citationGUIMARÃES, José Tasso Felix et al. Holocene history of a lake filling and vegetation dynamics of the Serra Sul dos Carajás, southeast Amazonia. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 91, supl. 2, 2019. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/10864. Acesso em:.pt_BR
dc.identifier.doihttp://dx.doi.org/10.1590/0001-3765201720160916pt_BR
dc.identifier.issn1678-2690pt_BR
dc.identifier.urihttps://repositorio.ufpa.br/handle/2011/10864
dc.languageengpt_BR
dc.publisherAcademia Brasileira de Ciênciaspt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.initialsABCpt_BR
dc.relation.ispartofAnais da Academia Brasileira de Ciênciaspt_BR
dc.rightsAcesso Abertopt_BR
dc.source.urihttp://ref.scielo.org/6zvn6wpt_BR
dc.subjectAmazon Foresten
dc.subjectCanga vegetationen
dc.subjectPalynologyen
dc.subjectCarbon and nitrogen isotopesen
dc.subjectGeochemistryen
dc.titleHolocene history of a lake filling and vegetation dynamics of the Serra Sul dos Carajás, southeast Amazoniaen
dc.typeArtigo de Periódicopt_BR

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