Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia
Abstract Understanding the role of open vegetation, particularly in white-sand ecosystems (WSE) and savannas, is crucial for elucidating their role in Amazonian biotic diversification. These ecosystems predominantly develop on sandy terrains, suggesting that the geological substrate significantly in...
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Nature Portfolio
2024-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-72725-0 |
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| author | Fernanda C. G. Rodrigues Camila C. Ribas Fabiano N. Pupim Naomi Porat Thomas K. Akabane Alberto Vicentini André O. Sawakuchi |
| author_facet | Fernanda C. G. Rodrigues Camila C. Ribas Fabiano N. Pupim Naomi Porat Thomas K. Akabane Alberto Vicentini André O. Sawakuchi |
| author_sort | Fernanda C. G. Rodrigues |
| collection | DOAJ |
| description | Abstract Understanding the role of open vegetation, particularly in white-sand ecosystems (WSE) and savannas, is crucial for elucidating their role in Amazonian biotic diversification. These ecosystems predominantly develop on sandy terrains, suggesting that the geological substrate significantly influences the vegetation upon it. Therefore, the interaction between landscape changes and biotic diversification is closely tied to the dynamics and resilience of these sandy substrates. Current WSE and savannas in lowland Amazonia colonized fluvial sediments deposited during the past 120 ka, with marked synchronicity over the last 23 ka, as shown by optically stimulated luminescence (OSL) and radiocarbon ages of such sandy substrates. In contrast, sandy substrates supporting open vegetation in highland areas, unsuitable for Quaternary sand accumulation, would have persisted beyond the Quaternary, as ancient sedimentary rocks in these areas are prone to developing sandy soils. The current distribution of open vegetation ecosystems in lowland Amazonia is coupled with the deposition and erosion of sandy sediments by Quaternary fluvial systems, while weathering sandy substrates in highland areas serve as long-term and resilient refugia beyond the Quaternary. The contrasting spatiotemporal dynamics of landscape changes in lowland and highland areas has implications for biodiversification or extinction events leading to current biogeography patterns in Amazonia. |
| format | Article |
| id | doaj-art-989e126eb0ca470489b54de5e24a7f40 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-989e126eb0ca470489b54de5e24a7f402025-08-20T02:50:07ZengNature PortfolioScientific Reports2045-23222024-10-0114111910.1038/s41598-024-72725-0Origin of sandy substrates controlling the distribution of open vegetation ecosystems in AmazoniaFernanda C. G. Rodrigues0Camila C. Ribas1Fabiano N. Pupim2Naomi Porat3Thomas K. Akabane4Alberto Vicentini5André O. Sawakuchi6School of Arts, Sciences and Humanities, University of São PauloNational Institute of Amazonian ResearchDepartment of Environmental Sciences, Federal University of São PauloGeological Survey of IsraelInstitute of Geosciences, University of São PauloNational Institute of Amazonian ResearchInstitute of Geosciences, University of São PauloAbstract Understanding the role of open vegetation, particularly in white-sand ecosystems (WSE) and savannas, is crucial for elucidating their role in Amazonian biotic diversification. These ecosystems predominantly develop on sandy terrains, suggesting that the geological substrate significantly influences the vegetation upon it. Therefore, the interaction between landscape changes and biotic diversification is closely tied to the dynamics and resilience of these sandy substrates. Current WSE and savannas in lowland Amazonia colonized fluvial sediments deposited during the past 120 ka, with marked synchronicity over the last 23 ka, as shown by optically stimulated luminescence (OSL) and radiocarbon ages of such sandy substrates. In contrast, sandy substrates supporting open vegetation in highland areas, unsuitable for Quaternary sand accumulation, would have persisted beyond the Quaternary, as ancient sedimentary rocks in these areas are prone to developing sandy soils. The current distribution of open vegetation ecosystems in lowland Amazonia is coupled with the deposition and erosion of sandy sediments by Quaternary fluvial systems, while weathering sandy substrates in highland areas serve as long-term and resilient refugia beyond the Quaternary. The contrasting spatiotemporal dynamics of landscape changes in lowland and highland areas has implications for biodiversification or extinction events leading to current biogeography patterns in Amazonia.https://doi.org/10.1038/s41598-024-72725-0 |
| spellingShingle | Fernanda C. G. Rodrigues Camila C. Ribas Fabiano N. Pupim Naomi Porat Thomas K. Akabane Alberto Vicentini André O. Sawakuchi Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia Scientific Reports |
| title | Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia |
| title_full | Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia |
| title_fullStr | Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia |
| title_full_unstemmed | Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia |
| title_short | Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia |
| title_sort | origin of sandy substrates controlling the distribution of open vegetation ecosystems in amazonia |
| url | https://doi.org/10.1038/s41598-024-72725-0 |
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