Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
01 Oct 2024
01 Oct 2024
Historique:
received:
17
01
2024
accepted:
10
09
2024
medline:
2
10
2024
pubmed:
2
10
2024
entrez:
1
10
2024
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 39354011
doi: 10.1038/s41598-024-72725-0
pii: 10.1038/s41598-024-72725-0
doi:
Substances chimiques
Sand
0
Soil
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
22833Subventions
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2018/12472-8
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2019/19948-0
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2018/23899-2
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 062.01355/2018
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 302411/2018-6
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 307179/2021-4
Informations de copyright
© 2024. The Author(s).
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