The rapid radiation of Bomarea (Alstroemeriaceae: Liliales), driven by the rise of the Andes

Carrie M. Tribble, Fernando Alzate-Guarín, Etelvina Gándara, Araz Vartoumian, John Gordon Burleigh, Rosana Zenil-Ferguson, Chelsea D. Specht, Carl J. Rothfels

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Geological events such as mountain uplift affect how, when, and where species diversify, but measuring those effects is a longstanding challenge. Andean orogeny impacted the evolution of regional biota by creating barriers to gene flow, opening new habitats, and changing local climate. Bomarea (Alstroemeriaceae) are tropical plants with (often) small, isolated ranges; in total, Bomarea species occur from central Mexico to central Chile. This genus appears to have evolved rapidly and quite recently, and rapid radiations are often challenging to resolve with traditional phylogenetic inference. In this study, we apply phylogenomics - with hundreds of loci, gene-tree-based data curation, and a multispecies-coalescent approach - to infer the phylogeny of Bomarea. We use this phylogeny to untangle the potential drivers of diversification and biogeographic history. In particular, we test if Andean orogeny contributed to the diversification of Bomarea. We find that Bomarea originated in the central Andes during the mid-Miocene, then spread north, following the trajectory of mountain uplift. Furthermore, Andean lineages diversified faster than non-Andean relatives. Bomarea thus demonstrates that - at least in some cases - geological change rather than environmental stability has driven high species diversity in a tropical biodiversity hotspot. These results also demonstrate the utility (and danger) of genome-scale data for making macroevolutionary inferences.

Original languageEnglish
Pages (from-to)221-236
Number of pages16
JournalEvolution
Volume78
Issue number2
DOIs
StatePublished - Feb 2024

Bibliographical note

Publisher Copyright:
© 2023 The Author(s). Published by Oxford University Press.

Keywords

  • Andean uplift
  • Liliales
  • divergence-time estimation
  • evolutionary radiation
  • target capture

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • General Agricultural and Biological Sciences

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