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Table 1 Comparison of three clock models in BEAST analyses via Bayes factors

From: Biogeography of Coptis Salisb. (Ranunculales, Ranunculaceae, Coptidoideae), an Eastern Asian and North American genus

Clock model Marginal likelihood Exponential Lognormal Random
PS implementation
 Exponential − 8809.70 37.44 −32.90
 Lognormal − 8828.42 −37.44 −70.34
 Random − 8793.25 32.90 70.34  
SS implementation
 Exponential − 8810.29 37.62 −33.72
 Lognormal − 8829.10 −37.62 −71.34
 Random −8793.43 33.72 71.34
  1. 2ln Bayes factor (BF) was calculated by marginal likelihoods derived from path sampling (PS) and stepping-stone sampling (SS) implementations in BEAST. 2ln BF > 2.0 represents positive evidence, > 6.00 represents strong evidence, and > 10.00 represents very strong evidence [31]