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Challenges in estimating ancestral state reconstructions:the evolution of migration in Sylvia warblers as a study case

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Integrative Zoology 2020年第3期15卷 161-173页

作者： Raquel PONTI Angel ARCONES David R.VIEITES National Museum of Natural Sciences MadridSpain Department of Evolutionary Biology Ecology and Environmental SciencesFaculty of BiologyUniversity of BarcelonaBarcelonaSpain Biodiversity Research Institute(IRBIO) University of BarcelonaBarcelonaSpain

Our current understanding of how species have evolved is mainly based on comparative phylogenetic methods,which use phylogenies to infer the evolution of *** development of ancestral state reconstruction(ASR)methods has provided the tools to reconstruct trait evolution,which are widely used in fields like evolutionary biology,macroecology and *** there are different elements involved in those analyses,with different levels of uncertainty(*** to branch length estimation,trait coding,statistical framework,taxon sampling or software),the various combinations of these elements likely have a strong impact on the reconstruction of the evolution of traits,potentially leading to opposite *** assess the impact of these different elements in ASR,we performed a set of analyses,including all possible combinations of such elements and using the evolution of migratory behavior in Sylvia warblers as a case study,which was coded as a continuous or as a discrete *** results show that taxon sampling,character coding,tree shape,statistical framework and software all significantly affect ASR,both individually and in *** all reconstructed tree nodes show discrepancies,but in the critical ones most pairwise comparisons between analyses lead to conflicting and unexpectedly antagonistic results(zero migration vs fully migratory),thus challenging interpretations of trait *** propose some possible solutions to partly inform decisions,involving the method selection and the incorporation of biological or fossil evidence regarding how traits evolve,but our results demand serious rethinking about how the research community currently uses ASR.

关键词： ancestral state reconstruction conflicting methods evolution of migration Sylvia warblers

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