| Texto completo | |
| Autor(es): |
Horak-Terra, Ingrid
;
Martinez Cortizas, Antonio
;
Pinto Da Luz, Cynthia Fernandes
;
Silva, Alexandre Christofaro
;
Mighall, Tim
;
De Camargo, Plinio Barbosa
;
Mendonca-Filho, Carlos Victor
;
De Oliveira, Paulo Eduardo
;
Cruz, Francisco Willian
;
Vidal-Torrado, Pablo
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF QUATERNARY SCIENCE; v. 35, n. 5, p. 13-pg., 2020-05-19. |
| Resumo | |
The late Quaternary evolution of central-eastern Brazil has been under-researched. Questions remain as to the origin of the Cerrado, a highly endangered biome, and other types of vegetation, such as the Capoes - small vegetation islands of semi-deciduous and mountain forests. We investigated the factors that influenced the expansion and contraction of the Cerrado and Capoes during the late Quaternary (last similar to 35 ka), using a multi-proxy approach: stable isotopes (delta C-13, delta N-15), geochemistry, pollen and multivariate statistics derived from a peat core (Pinheiro mire, Serra do Espinhaco Meridional). Five major shifts in precipitation, temperature, vegetation and landscape stability occurred at different timescales. Our study revealed that changes in the South Atlantic Convergence Zone (SACZ) seem to have been coeval with these shifts: from the Late Glacial Maximum to mid-Holocene the SACZ remained near (similar to 29.6 to similar to 16.5k cal a bp) and over (similar to 16.5 to similar to 6.1 k cal a bp) the study area, providing humidity to the region. This challenges previous research which suggested that climate was drier for this time period. At present, the Capoes are likely to be a remnant of a more humid climate; meanwhile, the Cerrado biome seems to have stablished in the late Holocene, after similar to 3.1 k cal a bp. (AU) | |
| Processo FAPESP: | 10/51637-0 - Reconstrução paleoambiental da Serra do Espinhaço Meridional durante o quartenário baseado nos registros polínicos, geoquímicos e isotópicos em organossolos |
| Beneficiário: | Ingrid Horák Terra |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/00676-1 - Evidências geoquímicas das mudanças ambientais durante o quaternário na Serra do Espinhaço meridional, Minas Gerais |
| Beneficiário: | Ingrid Horák Terra |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |