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Quantifying variation in speciation and extinction rates with clade data.

Emmanuel Paradis1, Pablo A Tedesco, Bernard Hugueny

  • 1Institut de Recherche pour le Développement, ISEM UMR 226/5554 - UM2/CNRS/IRD, Jl. Taman Kemang 32B, Jakarta, 12730, Indonesia. Emmanuel.Paradis@ird.fr.

Evolution; International Journal of Organic Evolution
|December 5, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces statistical tools for analyzing clade data, including species counts and ages. These methods enable robust estimation of speciation and extinction rates, even without fossil data.

Keywords:
Birth-death modelsextinctionmaximum likelihoodspeciationstem ages

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Area of Science:

  • Evolutionary biology
  • Phylogenetics
  • Biostatistics

Background:

  • High-level phylogenies are frequently used in evolutionary studies but often considered incomplete data.
  • Analyzing clade age and species richness is crucial for understanding diversification dynamics.

Purpose of the Study:

  • To develop statistical tools for analyzing "clade data" (clade ages and species numbers).
  • To model and test variations in speciation and extinction rates, including temporal and trait-based effects.
  • To assess the performance of new statistical tests and rate estimators.

Main Methods:

  • Development of a general statistical modeling framework for speciation and extinction rates.
  • Incorporation of temporal variation, unknown variation, and linear/nonlinear modeling.
  • Extensive simulation studies to evaluate statistical test performance and rate estimators.

Main Results:

  • The proposed approach allows for generalized modeling of diversification rates.
  • Statistical tests and estimators for speciation and extinction rates were assessed via simulations.
  • Accurate estimation of extinction rates is possible even without fossil evidence.

Conclusions:

  • New statistical tools enhance the analysis of phylogenetic data, particularly "clade data."
  • The methods facilitate the study of factors influencing diversification rates.
  • The ability to estimate extinction rates without fossils has significant implications for evolutionary research.