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Paleobiology of Itajaí Basin (Ediacaran? Santa Catarina): evolutionary and paleoecological implications

Grant number: 16/01827-4
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2016
Effective date (End): June 30, 2020
Field of knowledge:Biological Sciences - Zoology - Paleozoology
Principal researcher:Mírian Liza Alves Forancelli Pacheco
Grantee:Bruno Becker Kerber
Home Institution: Centro de Ciências Humanas e Biológicas (CCHB). Universidade Federal de São Carlos (UFSCAR). Sorocaba , SP, Brazil
Associated scholarship(s):18/21886-0 - The rise of complex ecosystems: unraveling and comparing aspects of exceptional preservation between Itajaí (Ediacaran, Brazil) and Francevillian (Paleoproterozoic, Gabon) paleobiotas, BE.EP.DR

Abstract

In the Ediacaran, soft-body organisms and animals with biocalcifiedskeletons became part of the biosphere that stated some forms and ecologicalstructures that enunciated and evolved in the Phanerozoic ecosystems. The EdiacaranBiota has representatives compiled in diverse parts of the world, temporally stratified inthe Avalon, White Sea and Nama assemblages, each one with intrinsic evolutionaryand paleoecological and, sometimes, paleoenvironmental peculiarities. Earth'sgeological history has shown deep relationships between the patterns of evolution anddiversification of life and environmental changes. These issues can be investigated inthe depositional environments of Ediacaran fossils, being able to reveal synergisticeffects between paleoautoecology, paleosinecololy and paleoenvironment in theseassemblages. In this context, the Itajaí Basin, Santa Catarina, seems to be animportant geologic unit of South America, with paleontological implications that cancompose the synthesis of knowledge about the dawn of animal life and thestructuration of marine ecosystems. Its record presents fossils of megascopicorganisms compatible with the typical Ediacara Biota, besides fossils already attributedto the Cambrian, such as Choia and Chancelloria. If the presence of Cambrian fossilsin Ediacaran rocks were corroborated in the Itajaí Basin, this would imply in abiostratigraphic set back of ca. 40-50 Ma. for these taxons. The paleobiologicalimplications of sponges in the Ediacaran, for example, would be revealed in ecosystemengineering and possible environmental rearrangements arising from the activity ofthese organisms. Therefore, this project aims to: a) investigate the taxonomicalcomposition, as well as its variation in the Itajaí Basin; b) verify the evolutionary andpaleoecological moments of this unit; c) model the paleoenvironments of the fossils bymeans of taphonomical aspects and MISS morphology; and d) establish comparisonswith correlate unities and chronologies in Australia, England and Newfoundland, tobetter interpretation of the evolutionary context of Itajaí Biota. Therefore, in addition tothe classic observation analysis, we will use paleometrical techniques such, as Micro-CT, Raman Spectroscopy, X-ray Fluorescence (XRF), Scanning Electron Microscopycoupled with Energy Dispersive Spectroscopy (EDS), and SHRIMP zircon dating. Thedating will be realized by SHRIMP U/Pb radiometric analysis.

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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)
BECKER-KERBER, BRUNO; GOMES PAIM, PAULO SERGIO; CHEMALE JUNIOR, FARID; GIRELLI, TIAGO JONATAN; ZUCATTI DA ROSA, ANA LUCIA; EL ALBANI, ABDERRAZAK; OSES, GABRIEL LADEIRA; PRADO, GUSTAVO M. E. M.; FIGUEIREDO, MILENE; AMARANTE SIMOES, LUIZ SERGIO; ALVES FORANCELLI PACHECO, MIRIAN LIZA. The oldest record of Ediacaran macrofossils in Gondwana (similar to 563 Ma, Itajai Basin, Brazil). GONDWANA RESEARCH, v. 84, p. 211-228, AUG 2020. Web of Science Citations: 0.
GOMES, AMANDA L. S.; BECKER-KERBER, BRUNO; OSES, GABRIEL L.; PRADO, GUSTAVO; BECKER KERBER, PEDRO; DE BARROS, GABRIEL E. B.; GALANTE, DOUGLAS; RANGEL, ELIDIANE; BIDOLA, PIDASSA; HERZEN, JULIA; PFEIFFER, FRANZ; RIZZUTTO, MARCIA A.; PACHECO, MIRIAN L. A. F. Paleometry as a key tool to deal with paleobiological and astrobiological issues: some contributions and reflections on the Brazilian fossil record. International Journal of Astrobiology, v. 18, n. 6, p. 575-589, DEC 2019. Web of Science Citations: 1.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.