Diversification patterns in the tribe Sauvagesieae (Ochnaceae), a species-rich group in the highly diverse non-Andean montane floras of South America

• Grant number: 20/09442-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: February 01, 2021
• End date: April 30, 2024
• Field of knowledge: Biological Sciences - Botany
• Principal Investigator: José Rubens Pirani
• Grantee: Sandra Patricia Reinales Ladino
• Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 22/01533-1 - Testing the confluence between dispersal-capacity and landscape heterogeneity as driver of diversification in campo rupestre clades, BE.EP.DR

Abstract

The tribe Sauvagesieae (Ochnaceae) is a predominantly-Neotropical clade comprising ca. 90 species and 16 genera. The greatest number of species in this region are found along the Brazilian Espinhaço Range, the Amazon-Guyana region, and some species in the northernmost Andean mountains, areas considered biodiversity hotspots with high endemism. Although several studies have been developed concerning the floristic composition and phytogeographical patterns of these areas, the understanding of the correlation between morphological evolution and geological-environmental changes with diversification dynamics across lineages, is still incipient. Currently, phylogenomic approaches allow to have more completely-sampled phylogenies, to assess the macroevolutionary patterns of the Neotropical flora in a phylogenetic context. Hence, the species richness and endemism rates of the tribe Sauvagesieae on highland regions of South America, make the tribe a good model for testing hypotheses of the recent radiation of mountain floras and the biotic or abiotic factors that explain the unbalanced species richness among lineages, and across geographical distribution. The main goals of this study are to reconstruct the phylogenetic relationships of the tribe Sauvagesieae using a phylogenomic approach, in order to characterize the diversification dynamics across lineages, and to test hypotheses about the correlation between the evolution of some morphological and environmental traits such as growth habit and types of seeds, with the diversification dynamics in this group. (AU)

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)

REINALES, SANDRA; PARRA-O, CARLOS. Disentangling the historical collection of Jose Jeronimo Triana from the Republica de la Nueva Granada between 1851 and 1857. Taxon, DEC 2021. (20/09442-0)