7
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      The impact of phylogenetic dating method on interpreting trait evolution: a case study of Cretaceous–Palaeogene eutherian body-size evolution

      1 , 1 , 2

      Biology Letters

      The Royal Society

      Mammalia, body size, evolutionary model, tempo, mode

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The fossil record of the earliest Cenozoic contains the first large-bodied placental mammals. Several evolutionary models have been invoked to explain the transition from small to large body sizes, but methods for determining evolutionary mode of trait change depend on input from tree topology and divergence dates. Different dating methods may therefore affect inference of evolutionary model. Here, we fit models of body mass evolution onto dated phylogenies of Cretaceous and Palaeogene mammals, comparing the effect of dating method on interpretation of evolutionary model. Among traditional palaeontological dating approaches, an Ornstein–Uhlenbeck model with high alpha parameters is recovered as best-fitting when minimum-age dating is used, while branch-sharing methods are highly sensitive to topology. Release or release–radiate models are preferred when Bayesian fossilized birth–death method is used, but when using stochastic cal3 dating of trees, a model of increased evolutionary rate without a release in constraint at the Cretaceous–Palaeogene boundary has highest support. These results demonstrate unambiguously that choice of dating method is critical for interpretation of continuous trait evolution, and that care must therefore be taken to consider these effects in macroevolutionary studies.

          Related collections

          Author and article information

          Journal
          Biol Lett
          Biol. Lett
          RSBL
          roybiolett
          Biology Letters
          The Royal Society
          1744-9561
          1744-957X
          August 2016
          : 12
          : 8
          Affiliations
          [1 ] Department of Genetics, Evolution, and Environment, University College London , Gower Street, London WC1E 6BT, UK
          [2 ] Department of Earth Sciences, University College London , Gower Street, London WC1E 6BT, UK
          Author notes

          An invited contribution to the special feature ‘Putting fossils in trees: combining morphology, time and molecules to estimate phylogenies and divergence times’.

          Article
          PMC5014015 PMC5014015 5014015 rsbl20160051
          10.1098/rsbl.2016.0051
          5014015
          27484642
          © 2016 The Author(s)

          Published by the Royal Society. All rights reserved.

          Funding
          Funded by: Leverhulme Trust, http://dx.doi.org/10.13039/501100000275;
          Award ID: 2014-364
          Categories
          1001
          70
          144
          Special Feature
          Fossil in Trees
          Custom metadata
          August, 2016

          body size, mode, Mammalia, evolutionary model, tempo

          Comments

          Comment on this article