Unknown

Dataset Information

0

Phylogenetic analysis using Levy processes: finding jumps in the evolution of continuous traits.


ABSTRACT: Gaussian processes, a class of stochastic processes including Brownian motion and the Ornstein-Uhlenbeck process, are widely used to model continuous trait evolution in statistical phylogenetics. Under such processes, observations at the tips of a phylogenetic tree have a multivariate Gaussian distribution, which may lead to suboptimal model specification under certain evolutionary conditions, as supposed in models of punctuated equilibrium or adaptive radiation. To consider non-normally distributed continuous trait evolution, we introduce a method to compute posterior probabilities when modeling continuous trait evolution as a Lévy process. Through data simulation and model testing, we establish that single-rate Brownian motion (BM) and Lévy processes with jumps generate distinct patterns in comparative data. We then analyzed body mass and endocranial volume measurements for 126 primates. We rejected single-rate BM in favor of a Lévy process with jumps for each trait, with the lineage leading to most recent common ancestor of great apes showing particularly strong evidence against single-rate BM.

SUBMITTER: Landis MJ 

PROVIDER: S-EPMC3566600 | biostudies-literature | 2013 Mar

REPOSITORIES: biostudies-literature

altmetric image

Publications

Phylogenetic analysis using Lévy processes: finding jumps in the evolution of continuous traits.

Landis Michael J MJ   Schraiber Joshua G JG   Liang Mason M  

Systematic biology 20121003 2


Gaussian processes, a class of stochastic processes including Brownian motion and the Ornstein-Uhlenbeck process, are widely used to model continuous trait evolution in statistical phylogenetics. Under such processes, observations at the tips of a phylogenetic tree have a multivariate Gaussian distribution, which may lead to suboptimal model specification under certain evolutionary conditions, as supposed in models of punctuated equilibrium or adaptive radiation. To consider non-normally distrib  ...[more]

Similar Datasets

| S-EPMC5790141 | biostudies-literature
| S-EPMC2997071 | biostudies-literature
| S-EPMC2703970 | biostudies-literature
| S-EPMC1688255 | biostudies-other
| S-EPMC9217972 | biostudies-literature
| S-EPMC5310616 | biostudies-literature
| S-EPMC4736839 | biostudies-literature
2022-08-12 | PXD031991 | Pride
| S-EPMC208017 | biostudies-other
| S-EPMC6063263 | biostudies-literature