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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Chronology of Terra Firme formation in Amazonian lowlands reveals a dynamic Quaternary landscape

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Pupim, F. N. [1, 2] ; Sawakuchi, A. O. [1] ; Almeida, R. P. [1] ; Ribas, C. C. [3] ; Kern, A. K. [1] ; Hartmann, G. A. [4] ; Chiessi, C. M. [5] ; Tamura, L. N. [1] ; Mineli, T. D. [1] ; Savian, J. F. [6] ; Grohmann, C. H. [7] ; Bertassoli, Jr., D. J. [1] ; Stern, A. G. [1] ; Cruz, F. W. [1] ; Cracraft, J. [8]
Total Authors: 15
[1] Univ Sao Paulo, Inst Geociencias, Sao Paulo, SP - Brazil
[2] Univ Fed Sao Paulo, Dept Ciencias Ambientais, Diadema, SP - Brazil
[3] Inst Nacl de Pesquisas da Amazonia, Manaus, AM - Brazil
[4] Univ Estadual Campinas, Inst Geociencias, Campinas, SP - Brazil
[5] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo, SP - Brazil
[6] Univ Fed Rio Grande do Sul, Inst Geociencias, Porto Alegre, RS - Brazil
[7] Univ Sao Paulo, Inst Energia & Ambiente, Sao Paulo, SP - Brazil
[8] Amer Museum Nat Hist, Dept Ornithol, New York, NY 10024 - USA
Total Affiliations: 8
Document type: Journal article
Source: QUATERNARY SCIENCE REVIEWS; v. 210, p. 154-163, APR 15 2019.
Web of Science Citations: 3

In the Amazonian lowlands, the shift from a large wetland dominated by flooded forests (Varzea) to the modern incised valleys bounded by extensive areas of non-flooded forests (Terra Firme) is considered a key driver of the Amazonian mega-biodiversity. Dating the sedimentary beds covered by Terra Firme forest is crucial to constrain the timing of such landscape change. Here we determined the formation ages of widespread regions of Terra Firme substrates in central Amazonian lowlands combining optically stimulated luminescence (OSL) dating, magnetostratigraphy and palinostratigraphy. Our data suggest a very dynamic fluvial system leading to a recent expansion of Terra Firme forests and retraction of Varzea forests during the late Pleistocene. The shift from an extensively flooded to non-flooded surface resulted from river incision around 45-35 ka, which potentially influenced the distribution of taxa by expanding available habitat, creating new barriers to dispersal, or changing the permeability of previous barriers. Transitions between flooded and non-flooded landscapes may have driven diversification and caused changes to species distributions, contributing to the high species diversity and biogeographic patterns currently found in the region. The late Quaternary evolution of Terra Firme substrates reveals that physical landscape changes play a major role in shaping biotic habitats even in the 10(4)-10(5) years time-scales. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/50260-6 - Structure and evolution of the Amazonian biota and its environment: an integrative approach
Grantee:Lúcia Garcez Lohmann
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 12/17517-3 - Response of the Western Atlantic Ocean to changes in the Atlantic meridional overturning circulation: from millennial to seasonal variability
Grantee:Cristiano Mazur Chiessi
Support type: Research Program on Global Climate Change - Young Investigators
FAPESP's process: 15/18314-7 - Pollen-based vegetation reconstruction during the last glacial interglacial-cycles from Western Tropical Atlantic marine cores
Grantee:Andrea Kern
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 14/05582-0 - The Amazonian biota structure and evolution and its environment: Amazon Basin paleobotany and palynology
Grantee:Andrea Kern
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 16/11141-2 - Hydrologic variability and sediment supply of the Xingu and Tapajós rivers: Climate change and anthropogenic impacts in eastern Amazon rivers during Holocene
Grantee:Dailson José Bertassoli Junior
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/23334-4 - Coupling Optically Stimulated Luminescence (OSL) and Terrestrial Cosmogenic Nuclides (TCN) analysis to reconstruct changes in the Amazonian fluvial system in the Late Cenozoic (<5 Ma)
Grantee:Fabiano Do Nascimento Pupim
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 16/09293-9 - Terrestrial cosmogenic nuclides analysis to reconstruct changes in the Amazonian fluvial system in the late Cenozoic (<5 ma)
Grantee:Fabiano Do Nascimento Pupim
Support type: Scholarships abroad - Research Internship - Post-doctor