On the biogeography of Centipeda: a species-tree diffusion approach

Systematic Biology
Stephan NylinderArne A Anderberg

Abstract

Reconstructing the biogeographic history of groups present in continuous arid landscapes is challenging due to the difficulties in defining discrete areas for analyses, and even more so when species largely overlap both in terms of geography and habitat preference. In this study, we use a novel approach to estimate ancestral areas for the small plant genus Centipeda. We apply continuous diffusion of geography by a relaxed random walk where each species is sampled from its extant distribution on an empirical distribution of time-calibrated species-trees. Using a distribution of previously published substitution rates of the internal transcribed spacer (ITS) for Asteraceae, we show how the evolution of Centipeda correlates with the temporal increase of aridity in the arid zone since the Pliocene. Geographic estimates of ancestral species show a consistent pattern of speciation of early lineages in the Lake Eyre region, with a division in more northerly and southerly groups since ∼840 ka. Summarizing the geographic slices of species-trees at the time of the latest speciation event (∼20 ka), indicates no presence of the genus in Australia west of the combined desert belt of the Nullabor Plain, the Great Victoria Desert, the Gibson ...Continue Reading

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Citations

Aug 10, 2015·Systematic Biology·Ignacio QuinteroForrest W Crawford
Sep 6, 2015·Molecular Biology and Evolution·Nídia Sequeira TrovãoPhilippe Lemey
Mar 24, 2015·Molecular Phylogenetics and Evolution·Mário H Terra-AraujoUlf Swenson
Jul 19, 2016·American Journal of Botany·Ivana RešetnikPeter Schönswetter
May 15, 2020·Molecular Biology and Evolution·Wan-Ting HeShuo Su
Feb 3, 2021·Molecular Biology and Evolution·Simon DellicourPhilippe Lemey
May 14, 2021·Molecular Phylogenetics and Evolution·Ntwai A MoiloaBengt Oxelman
Sep 1, 2021·Trends in Ecology & Evolution·Jan Hackel, Isabel Sanmartín

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