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Testing the confluence between dispersal-capacity and landscape heterogeneity as driver of diversification in campo rupestre clades

Grant number: 22/01533-1
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): August 31, 2022
Effective date (End): August 30, 2023
Field of knowledge:Biological Sciences - Botany
Principal researcher:José Rubens Pirani
Grantee:Sandra Patricia Reinales Ladino
Supervisor abroad: Felix Forest
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: Royal Botanic Gardens, Kew, England  
Associated to the scholarship:20/09442-0 - Diversification patterns in the tribe Sauvagesieae (Ochnaceae), a species-rich group in the highly diverse non-Andean montane floras of South America, BP.DR

Abstract

The Neotropics comprises different heterogeneous environments harboring a set of endemic species that have arisen as consequence of both geological and short-time scale drivers. The tribe Sauvagesieae (Ochnaceae) is one of those groups and its greatest species richness occurs in mountain areas within the region, i.e., along the Brazilian Espinhaço Range, the Amazon-Guyana region, and some species in the northernmost Andean mountains, areas considered biodiversity hotspots with high rates of endemism. Several studies have been developed concerning the floristic composition and phytogeographical patterns of these areas, but the understanding of the correlation between morphological evolution and geological-environmental changes with diversification dynamics across lineages is still incipient. The high species richness and endemism rates of the tribe Sauvagesieae in highland regions of South America make it a good model for testing hypotheses linked to recent radiation of montane floras, and the biotic and abiotic factors that explain their unbalanced diversity across time and space. The goals of this study are to reconstruct the phylogenetic relationships of the tribe Sauvagesieae using a phylogenomic approach. The phylogenetic tree will then be used to characterize the diversification dynamic across lineages and to test its correlation with the evolution of morphological traits such as growth habit and seeds diversity in heterogeneous landscapes. (AU)

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