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| Author(s): |
Tiago Ferraz da Silva
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2022-01-28 |
| Examining board members: |
Tábita Hünemeier;
David Comas;
Mark Oliver Röhrig Hübbe;
Rolando Gonzalez Jose
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| Advisor: | Tábita Hünemeier; Andre Menezes Strauss |
| Abstract | |
Along the Brazilian coast, the presence of thousands of shellmounds is remarkable, some of which are more than 40 meters high. They were constructed from the intentional accumulation of mollusc shells and marine fauna over hundreds or thousands of years. The uses of the shellmounds varied widely in time and space, but many of them were used as burial ground preserving hundreds of skeletons in a single location. The ancient population history of these coastal groups was previously investigated through the analysis of anatomical markers and material culture. However, the ambiguity inherent in such markers resulted in divergent models to explain the origins, dispersion and destitution of these groups, as well as their relationship with other neighboring societies. In the present study, we contribute to these questions by evaluating 34 genome-wide data extracted from ancient human remains dated between ~10,000 and 100 years before the present, distributed over four Brazilian macro-regions. The results obtained reveal the presence of a strong local genetic component, restricted to some specific archaeological contexts, as well as evidence of population reductions or consanguinity effects in some of the coastal populations in the South. Furthermore, it was possible to describe the arrival of migratory pulses from the interior bringing new genetic components to the late burials of the Sambaquis groups in the South and Southeast. (AU) | |
| FAPESP's process: | 16/12371-1 - Reconstructing South America human history from paleogenomic data |
| Grantee: | Tiago Ferraz da Silva |
| Support Opportunities: | Scholarships in Brazil - Doctorate |