Last Glacial Maximum
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Simulation of the last glacial maximum climate: a experiment with a statistical-dynamical model / Simulação do clima do último máximo glacial: um experimento com um modelo estatístico - dinâmico
Um modelo estatístico - dinâmico média zonal de equações primitivas foi utilizado para avaliar a capacidade do modelo em simular o clima médio zonal do Último Máximo Glacial (UMG), estudar a importância relativa das forçantes climáticas no clima do UMG e diagnosticar a circulação monçonica no UMG. A simulação do UMG resultou em um resfriament
Publicado em: 2007
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14. Lack of phylogeography in European mammals before the last glaciation
In many extant animal and plant species in Europe and North America a correlation exists between the geographical location of individuals and the genetic relatedness of the mitochondrial (mt) DNA sequences that they carry. Here, we analyze mtDNA sequences from cave bears, brown bears, cave hyenas, and Neandertals in Europe before the last glacial maximum and
National Academy of Sciences.
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15. Glacial survival of the Norwegian lemming (Lemmus lemmus) in Scandinavia: inference from mitochondrial DNA variation.
In order to evaluate the biogeographical hypothesis that the Norwegian lemming (Lemmus lemmus) survived the last glacial period in some Scandinavian refugia, we examined variation in the nucleotide sequence of the mitochondrial control region (402 base pairs (bp)) and the cytochrome b (cyt b) region (633 bp) in Norwegian and Siberian (Lemmus sibiricus) lemmi
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16. Late Quaternary extinction of a tree species in eastern North America
Widespread species- and genus-level extinctions of mammals in North America and Europe occurred during the last deglaciation [16,000–9,000 yr B.P. (by 14C)], a period of rapid and often abrupt climatic and vegetational change. These extinctions are variously ascribed to environmental change and overkill by human hunters. By contrast, plant extinctions
The National Academy of Sciences.
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17. Surviving the ice: Northern refugia and postglacial colonization
The contemporary distribution of biological diversity cannot be understood without knowledge of how organisms responded to the geological and climatic history of Earth. In particular, Quaternary expansions and contractions of glacial ice sheets are thought to have played an important role in shaping the distribution of biodiversity among current populations
National Academy of Sciences.
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18. Characteristics of the deep ocean carbon system during the past 150,000 years: ΣCO2 distributions, deep water flow patterns, and abrupt climate change
Studies of carbon isotopes and cadmium in bottom-dwelling foraminifera from ocean sediment cores have advanced our knowledge of ocean chemical distributions during the late Pleistocene. Last Glacial Maximum data are consistent with a persistent high-ΣCO2 state for eastern Pacific deep water. Both tracers indicate that the mid-depth North and tropical A
The National Academy of Sciences of the USA.
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19. High-resolution mtDNA evidence for the late-glacial resettlement of Europe from an Iberian refugium
The advent of complete mitochondrial DNA (mtDNA) sequence data has ushered in a new phase of human evolutionary studies. Even quite limited volumes of complete mtDNA sequence data can now be used to identify the critical polymorphisms that define sub-clades within an mtDNA haplogroup, providing a springboard for large-scale high-resolution screening of human
Cold Spring Harbor Laboratory Press.
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20. Geographical structuring in the mtDNA of Italians.
Geographical patterns of mtDNA variation were studied in 12 Italian samples (1072 individuals) by two different spatial autocorrelation methods. Separate analyses of the frequencies of 12 restriction morphs show North-South clines, differences between Sardinia and the mainland populations, and the effects of isolation by distance. A recently developed autoco
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21. A Signal, from Human mtDNA, of Postglacial Recolonization in Europe
Mitochondrial HVS-I sequences from 10,365 subjects belonging to 56 populations/geographical regions of western Eurasia and northern Africa were first surveyed for the presence of the T→C transition at nucleotide position 16298, a mutation which has previously been shown to characterize haplogroup V mtDNAs. All mtDNAs with this mutation were then screened f
The American Society of Human Genetics.