Characterization of tree growth rings jatobá (Hymenaea courbaril L.), cedro (Cedrela fissilis Vell.) and roxinho (Peltogyne paniculata Benth.), occurrents in the Flona-Jamari, RO, Brazil

• Grant number: 20/08132-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2020
• End date: July 31, 2021
• Field of knowledge: Biological Sciences - Botany
• Agreement: NSF and NSF's Partnership for International Research and Education (PIRE)
• Principal Investigator: Mario Tommasiello Filho
• Grantee: Jiúlia Marrafon Della Riva
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated research grant: 17/50085-3 - PIRE: climate research education in the Americas using tree-ring speleothem examples (PIRE-CREATE), AP.TEM

Abstract

This proposal aims to reconstruct the variability and climate change by anatomical and physical parameters of growth rings of trees occurring in the National Forest of Jamari, Rondônia from the South American summer monsoon region. Rising atmospheric concentrations of CO2 are triggering extreme events relevant to the climate worldwide. In this context, understanding the response of tropical forest species to the climate change is fundamental. One of the alternatives to estimate how these changes can affect forests is through indirect records achieved with dendrochronological analyzes. Although in the Neotropical region trees of different species have been identified as potential for dendrochronological studies, there are still few places with long-term series of growth ring parameters for interpretation of climate variation. It is important to emphasize that the present proposal is linked to the process FAPESP: 2018 / 22914-8 and FAPESP: 2017 / 50085-3 (US-PIRE and USP), which respond to the main objective of collaboration and joint analysis of the speleothems and growth rings records, in order to better explore the scientific potential of each type of data. This would be an innovative research strategy due to differences in spectral characteristics and therefore sensitivity to different climate forcers. Therefore, the comparative analysis of these two records will produce a clearer climate reconstitution and greater climate coherence in South America. (AU)