Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário
Autor(a) principal: | |
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Data de Publicação: | 1980 |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/14357 |
Resumo: | The palynological investigation is discussed for Holocene sediment cores from five different sites in the Amazon basin. It is interpreted that the changes In the vegetation registered in the diagrams were due mainly to local processes of sedimentation and changes of water level. The pollen diagrams show successions in Alchornea, Symmeria, Myrtaceae, and Miconia play an important role. This reflects changes in the várzea and igapó forests. Other successions seem to be from open water via floating meadows (mainly of arasses) and Cecropia stands to várzea forest (Terra Nova diagram). Apparently lower effective precipitation in the Amazon basin was dated around and shortly after 4000 B.P. and 2100 B.P. (apparently the culmination of a relatively dry period between c. 2700 and 2000 B.P.), and around 700 B.P. (A.D. 1200). In other parts of tropical South America evidences of these "drier" intervals have been found (and dated) and seem to be regional phenomena. |
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Absy, Maria Lúcia2020-04-24T16:33:56Z2020-04-24T16:33:56Z1980https://repositorio.inpa.gov.br/handle/1/1435710.1590/1809-43921980104929The palynological investigation is discussed for Holocene sediment cores from five different sites in the Amazon basin. It is interpreted that the changes In the vegetation registered in the diagrams were due mainly to local processes of sedimentation and changes of water level. The pollen diagrams show successions in Alchornea, Symmeria, Myrtaceae, and Miconia play an important role. This reflects changes in the várzea and igapó forests. Other successions seem to be from open water via floating meadows (mainly of arasses) and Cecropia stands to várzea forest (Terra Nova diagram). Apparently lower effective precipitation in the Amazon basin was dated around and shortly after 4000 B.P. and 2100 B.P. (apparently the culmination of a relatively dry period between c. 2700 and 2000 B.P.), and around 700 B.P. (A.D. 1200). In other parts of tropical South America evidences of these "drier" intervals have been found (and dated) and seem to be regional phenomena.Volume 10, Número 4, Pags. 929-930Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessDados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternárioinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleActa Amazonicaporreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfapplication/pdf731054https://repositorio.inpa.gov.br/bitstream/1/14357/1/artigo-inpa.pdf5ce8bd6d58acdf347175255468c56e26MD51CC-LICENSElicense_rdfapplication/octet-stream914https://repositorio.inpa.gov.br/bitstream/1/14357/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD521/143572020-07-13 13:45:04.394oai:repositorio:1/14357Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-13T17:45:04Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.pt_BR.fl_str_mv |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
title |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
spellingShingle |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário Absy, Maria Lúcia |
title_short |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
title_full |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
title_fullStr |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
title_full_unstemmed |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
title_sort |
Dados sobre as mudanças do clima e da vegetação da Amazônia durante o Quaternário |
author |
Absy, Maria Lúcia |
author_facet |
Absy, Maria Lúcia |
author_role |
author |
dc.contributor.author.fl_str_mv |
Absy, Maria Lúcia |
description |
The palynological investigation is discussed for Holocene sediment cores from five different sites in the Amazon basin. It is interpreted that the changes In the vegetation registered in the diagrams were due mainly to local processes of sedimentation and changes of water level. The pollen diagrams show successions in Alchornea, Symmeria, Myrtaceae, and Miconia play an important role. This reflects changes in the várzea and igapó forests. Other successions seem to be from open water via floating meadows (mainly of arasses) and Cecropia stands to várzea forest (Terra Nova diagram). Apparently lower effective precipitation in the Amazon basin was dated around and shortly after 4000 B.P. and 2100 B.P. (apparently the culmination of a relatively dry period between c. 2700 and 2000 B.P.), and around 700 B.P. (A.D. 1200). In other parts of tropical South America evidences of these "drier" intervals have been found (and dated) and seem to be regional phenomena. |
publishDate |
1980 |
dc.date.issued.fl_str_mv |
1980 |
dc.date.accessioned.fl_str_mv |
2020-04-24T16:33:56Z |
dc.date.available.fl_str_mv |
2020-04-24T16:33:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.inpa.gov.br/handle/1/14357 |
dc.identifier.doi.none.fl_str_mv |
10.1590/1809-43921980104929 |
url |
https://repositorio.inpa.gov.br/handle/1/14357 |
identifier_str_mv |
10.1590/1809-43921980104929 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Volume 10, Número 4, Pags. 929-930 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Acta Amazonica |
publisher.none.fl_str_mv |
Acta Amazonica |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional do INPA instname:Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA |
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INPA |
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Repositório Institucional do INPA |
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Repositório Institucional do INPA |
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