Last Glacial Maximum
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. ESTRATIGRAFIA GPR E MORFOGÊNESE QUATERNÁRIA NO SEMIÁRIDO BRASILEIRO
Resumo O Parque Nacional da Serra da Capivara desponta como estudo de caso para pesquisas do Quaternário e de geomorfologia no nordeste semiárido brasileiro. Trabalhos anteriores no vale da Serra Branca, uma das principais unidades geomorfológicas do parque, revelam o predomínio de espessos depósitos coluviais, sugerindo flutuações climáticas episód
Mercator (Fortaleza). Publicado em: 09/12/2019
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2. Paleodistribution of Neotropical species of Erythroxylum (Erythroxylaceae) in humid and dry environments
ABSTRACT Variation in environmental conditions during the Quaternary period served as important filters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of different vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Er
Acta Bot. Bras.. Publicado em: 21/09/2017
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3. Green turtle (Chelonia mydas) genetic diversity at Paranaguá Estuarine Complex feeding grounds in Brazil
Sea turtles are marine reptiles that undertake long migrations through their life, with limited information regarding juvenile stages. Feeding grounds (FGs), where they spend most of their lives, are composed by individuals from different natal origins, known as mixed stock populations. The aim of this study was to assess genetic composition, natal origins a
Genet. Mol. Biol.. Publicado em: 2015-09
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4. Spatial and temporal population genetic variation and structure of Nothotsuga longibracteata (Pinaceae), a relic conifer species endemic to subtropical China
Nothotsuga longibracteata, a relic and endangered conifer species endemic to subtropical China, was studied for examining the spatial-temporal population genetic variation and structure to understand the historical biogeographical processes underlying the present geographical distribution. Ten populations were sampled over the entire natural range of the spe
Genet. Mol. Biol.. Publicado em: 2013
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5. Avaliação da aplicação associada dos dados de δ18O e da razão Mg/Ca de foraminíferos como uma ferramenta paleoceanográfica / Evalution of the associated applicability of ?18O and Mg/Ca ratio data in foraminifera as a paleoceanographic tool
O objetivo do presente estudo é avaliar o uso associado dos proxies ?18O e Mg/Ca obtidos em testas de foraminíferos. Para alcançar tal objetivo foram realizadas análises de ?18O e Elemento/Ca em amostras de foraminíferos planctônicos (G. ruber e G. sacculifer) e bentônicos (Cibicidoides spp., C. corpulentus, Uvigerina spp. e H. elegans) de dois testem
Publicado em: 2011
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6. Estudos moleculares em Gymnotus pantherinus (Gymnotiformes, Gymnotidae): uma abordagem sistemática e filogeográfica / Molecular studies in Gymnotus pantherinus (Gymnotiformes: Gymnotidae): a systematic and phylogeographic approach
Gymnotus pantherinus is an endemic fish species found in the Brazilian coastal drainages occurring from Bahia to Rio Grande do Sul states. Morphological evidence has suggested that Gymnotus pantherinus might constitute a species complex. In the present study, the taxonomic status of Gymnotus species group has been evaluated using both mitochondrial and nucle
Publicado em: 2011
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7. Reconstrução da hidrografia superficial do Atlântico Sul Ocidental desde o Último Máximo Glacial a partir do estudo de foraminíferos planctônicos / Sea surface hydrography reconstruction of the Western South Atlantic since the Last Glacial Maximum based on the study of planktonic foraminifera
The goal of this thesis is to document the paleoclimatic and paleoceanographic changes occurred at the millennial scale since the Last Glacial Maximum at the surface Western South Atlantic. Paleotemperature, paleosalinity and paleoproductivity estimates were obtained for this purpose based on faunal changes of foraminifera assemblages, carbon and oxygen stab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/03/2010
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8. A reevaluation of the native american MtDNA genome diversity and its bearing on the models of early colonization of Beringia
The Americas were the last continents to be populated by humans, and their colonization represents a very interesting chapter in our species’ evolution in which important issues are still contentious or largely unknown. One difficult topic concerns the details of the early peopling of Beringia, such as for how long it was colonized before people moved into
Publicado em: 2010
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9. Mudanças paleoambientais quaternárias na região de Lagoa Santa, MG, Brasil: a palinologia como subsídio para o entendimento do padrão de ocupação humana.
The objective of this study is to determine the vegetational and climatic history of the Lagoa Santa, Minas Gerais, Brazil since the Last Glacial Maximum (LGM) and relate it with the pattern of human occupancy and to test the Arcaic Gap hypothesis, which suggests that human groups would have migrated to others areas of Brazil, due to dry climates, which woul
Publicado em: 2009
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10. Simulação do clima do último máximo glacial: um experimento com um modelo estatístico - dinâmico / Simulation of the last glacial maximum climate: a experiment with a statistical-dynamical model
A statistical - dynamical zonally averaged model of primitive equations was used to evaluate the capacity of the model in simulating the zonally averaged climate of the Last Glacial Maximum (LGM), studying the relative importance of the climate forcing in the LGM climate and to diagnosis the monsoon circulation in the LGM. The simulation of the LGM resulted
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2007
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11. Contributions to South Atlantic paleoceanography in the last 25,000 years: evidence from calcareous nannofossils from northeastern brazilian slope / Nanofósseis calcários da margem continental nordeste do Brasil: uma contribuição à paleoceanografia do Atlântico Sul nos últimos 25.000 anos
This study focuses on changes in calcareous nannofossil assemblages as an evidence of paleoceanographic variability during the last 25,000 years in two deep sea piston cores from the northeastern Brazilian continental margin. To support reconstructing ancient marine environment others proxies have been applied along with the calcareous nannofossil analysis:
Publicado em: 2007
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12. Foraminíferos planctônicos em resposta às mudanças oceanográficas no Atlântico Tropical oeste durante os últimos 30.000 anos / Planktonic foraminifera response to oceanographic changes in the western tropical Atlantic during the last 30,000 years
The planktonic foraminiferal assemblages of two piston cores from western tropical Atlantic covering the last 30,000 years have been analysed together with paleoceanographic ANN sea surface temperature reconstruction and ?18O and ?13C of the shallow dwelling planntonic foraminifera Globigerinoides ruber white. These proxies reveal that during the Last Glacia
Publicado em: 2007