Olivier Maurin, Artemis Anest, Félix Forest, Ian Turner, Russell L. Barrett, Robyn C. Cowan, Lijia Wang, Kyle W. Tomlinson, Tristan Charles‐Dominique

Drift in the tropics: Phylogenetics and biogeographical patterns in Combretaceae

  • Ecology
  • Ecology, Evolution, Behavior and Systematics
  • Global and Planetary Change
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AbstractAimThe aim of this study was to further advance our understanding of the species‐rich, and ecologically important angiosperm family Combretaceae to provide new insights into their evolutionary history. We assessed phylogenetic relationships in the family using target capture data and produced a dated phylogenetic tree to assess fruit dispersal modes and patterns of distribution.LocationTropical and subtropical regions.Time PeriodCretaceous to present.Major Taxa StudiedFamily Combretaceae is a member of the rosid clade and comprises 10 genera and more than 500 species, predominantly assigned to genera Combretum and Terminalia, and occurring on all continents and in a wide range of ecosystems.MethodsWe use a target capture approach and the Angiosperms353 universal probes to reconstruct a robust dated phylogenetic tree for the family. This phylogenetic framework, combined with seed dispersal traits, biome data and biogeographic ranges, allows the reconstruction of the biogeographical history of the group.ResultsAncestral range reconstructions suggest a Gondwanan origin (Africa/South America), with several intercontinental dispersals within the family and few transitions between biomes. Relative abundance of fruit dispersal types differed by both continent and biome. However, intercontinental colonizations were only significantly enhanced by water dispersal (drift fruit), and there was no evidence that seed dispersal modes influenced biome shifts.Main ConclusionsOur analysis reveals a paradox as drift fruit greatly enhanced dispersal distances at intercontinental scale but did not affect the strong biome conservatism observed.

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