Late Pleistocene glacial forest elements of Brazilian Amazonia

Autor(es)

Lima, Jr., W. J. S. ^[1] ; Cohen, M. C. L. ^{[1, 2]} ; Rossetti, D. F. ^[3] ; Franca, M. C. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Para, Lab Coastal Dynam, Grad Program Geol & Geochem, Ave Perimentral 2651, BR-66077530 Belem, PA - Brazil

^[2] Fed Univ Para, Fac Oceanog, Rua Augusto Correa 1, BR-66075110 Belem, PA - Brazil

^[3] Natl Space Res Inst INPE, Rua Astronautas 1758-CP 515, BR-12245970 Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY; v. 490, p. 617-628, JAN 15 2018.
• Citações Web of Science: 0

Resumo

Pollen data recovered from the sedimentary record of western Amazonia is still inadequate to fully address climate changes over the Last Glaciation in this region. The present work focuses vegetation dynamics from an area of southwestern Amazonia during the past 42,000 cal yr B.P. based on the integration of previous and new pollen data. Sediment cores were sampled from two sites covered by tropical rainforest in fluvial terraces of the Madeira River, a major southern Amazonian tributary. The results indicated a significant proportion of cold adapted Andean tree species, represented by Alnus (0-20%), Hedyosmwn (1-15%), Podocarpus (0-5%), Illex (1-11%) and Weinmannia (0-1%) at least between > 43,163-42,018 cal yr B.P. and 10,394-10,240 cal yr B.P. During the Holocene, only pollen representative of herbs and modern Amazonian vegetation persisted. The new pollen record confirmed previous documented results that vegetation communities presently restricted to Andean areas at altitudes higher than 2000-3000 m, occupied this region of the Amazonian lowlands close to the onset and probably also during the Last Glacial Maximum. (AU)

• Processo FAPESP: 13/50475-5 - Mapping Amazonian biodiversity at multiple scales by integrating geology and ecology
• Beneficiário: Dilce de Fátima Rossetti
• Modalidade de apoio: Auxílio à Pesquisa - Regular