publication . Article . 2014

Tempo of Diversification of Global Amphibians: One-Constant Rate, One-Continuous Shift or Multiple-Discrete Shifts?

Youhua Chen;
Open Access English
  • Published: 31 Jan 2014 Journal: Animal Systematics (issn: 2234-6953, eissn: 2234-8190, Copyright policy)
  • Publisher: Korean Society of Systematic Zoology
Abstract
In this brief report, alternative time-varying diversification rate models were fitted onto the phylogeny of global amphibians by considering one-constant-rate (OCR), one-continuous-shift (OCS) and multiplediscrete- shifts (MDS) situations. The OCS diversification model was rejected by γ statistic (γ=-5.556, p⁄ 0.001), implying the existence of shifting diversification rates for global amphibian phylogeny. Through model selection, MDS diversification model outperformed OCS and OCR models using “laser” package under R environment. Moreover, MDS models, implemented using another R package “MEDUSA”, indicated that there were sixteen shifts over the internal nodes f...
Subjects
free text keywords: adaptive radiation, rate variation, maximum likelihood, model selection and comparison, Biology (General), QH301-705.5, Zoology, QL1-991, R package, Ecology, Model selection, Statistic, Biology, Diversification (marketing strategy), Statistics, Diversification rates
Powered by OpenAIRE Open Research Graph
Any information missing or wrong?Report an Issue
publication . Article . 2014

Tempo of Diversification of Global Amphibians: One-Constant Rate, One-Continuous Shift or Multiple-Discrete Shifts?

Youhua Chen;