Pollen-based vegetation reconstruction during the last glacial interglacial-cycles from Western Tropical Atlantic marine cores

• Grant number: 15/18314-7
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: January 11, 2016
• End date: January 10, 2017
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Francisco William da Cruz Junior
• Grantee: Andrea Kern
• Supervisor: Debra Willard
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: U.S. Geological Survey, Denver (USGS), United States
• Associated to the scholarship: 14/05582-0 - The Amazonian biota structure and evolution and its environment: Amazon Basin paleobotany and palynology, BP.PD

Abstract

In this project, a high-resolution palynological analysis shall be performed on a marine drilled core from the western tropical Atlantic (equatorial Brazilian continental slope). Preliminary dating in this multi-proxy project suggests a mid-Calabrian age (approx. 1 Ma), which allows the investigation of vegetation dynamics during a period of rapid climatic changes of the glacial-interglacial phases and furthermore predates all previously published records in this region. Shifts in the vegetation composition reflect possible drying/cooling events along the NE coast of Brazil and will contribute to the climatic reconstruction by deciphering possible influence of the Inter Tropical Convergence Zone or/and South American Monsoon System. Additionally, possible alternation of inflowing river-derived terrestrial material will indicate the strength the North Brazilian current and identify possible phases of Amazon River inflow. This study will contribute to the understanding of biodiversity of tropical biomes during glacial stages and give insight into past forest connections between Amazon and NE Brazil. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PUPIM, F. N.; SAWAKUCHI, A. O.; ALMEIDA, R. P.; RIBAS, C. C.; KERN, A. K.; HARTMANN, G. A.; CHIESSI, C. M.; TAMURA, L. N.; MINELI, T. D.; SAVIAN, J. F.; et al. Chronology of Terra Firme formation in Amazonian lowlands reveals a dynamic Quaternary landscape. QUATERNARY SCIENCE REVIEWS, v. 210, p. 154-163, APR 15 2019. (14/23334-4, 16/11141-2, 15/18314-7, 14/05582-0, 12/17517-3, 16/09293-9, 12/50260-6)

FERREIRA, FABRICIO; SILVA, CLEVERSON G.; OLIVEIRA, ALLAN S.; CHIESSI, CRISTIANO M.; KERN, ANDREA K.; BAKER, PAUL A.; DWYER, GARY; RIGSBY, CATHERINE A.; HUANG, ENQING; TIAN, JUN. Biochronostratigraphy of the western equatorial Atlantic for the last 1.93 Ma. QUATERNARY INTERNATIONAL, v. 598, p. 24-37, OCT 10 2021. (14/05582-0, 19/24349-9, 18/15123-4, 15/18314-7)

KERN, ANDREA K.; AKABANE, THOMAS KENJI; FERREIRA, JAQUELINE Q.; CHIESSI, CRISTIANO M.; WILLARD, DEBRA A.; FERREIRA, FABRICIO; SANDERS, ALLAN OLIVEIRA; SILVA, CLEVERSON G.; RIGSBY, CATHERINE; CRUZ, FRANCISCO W.; et al. A 1.8 million year history of Amazon vegetation. QUATERNARY SCIENCE REVIEWS, v. 299, p. 18-pg., 2023-01-01. (12/50260-6, 19/24349-9, 18/15123-4, 14/05582-0, 15/18314-7, 19/19948-0)