Dear Ted, yes. I have a trait with K = 0.041. According to randomization tests, K differs from the random expectation (p= 0.001; test from Blomberg et al. 2003, computed with 'phylosig' from the phylosig package) AND from the expectation under a Brownian Motion model (also p=0.001; simulated using 'brownie.lite'/'paintSubTree'). I had similar results for some more traits.
Does this mean that there is less phylogenetic signal than expected under Brownian Motion, but more than expected at random? Or does it mean that the trait evolves even faster than expected at random, i.e. that closely related taxa differ more than expected from random? Thanks a lot! Florian Dr. Florian Menzel Department of Evolutionary Biology, Institute of Zoology University of Mainz Johannes-von-M�ller-Weg 6 55128 Mainz, Germany phone: 0049-6131-3927848 http://www.bio.uni-mainz.de/zoo/evobio/73_ENG_HTML.php Gemeinsam einen Unterschied machen! www.synagieren.de<http://www.synagieren.de> 'For every complex problem there is an answer that is clear, simple, and wrong.' (Henry Louis Mencken) ________________________________ Von: Theodore Garland <theodore.garl...@ucr.edu> Gesendet: Mittwoch, 30. November 2016 18:38 An: Menzel, Dr. Florian Cc: r-sig-phylo@r-project.org Betreff: Re: [R-sig-phylo] phylogenetic signal different from BM and random Dear Florian, What do you mean, exactly? Do you mean the K statistics is, say, about 0.5, and that the randomizaton test for phylogenetic signal (Blomberg et al. 2003), which is based on the MSE not K, is significant, indicating that you do have some degree of signal (more than zero)? Cheers, Ted Theodore Garland, Jr., Distinguished Professor Department of Biology University of California, Riverside Riverside, CA 92521 Office Phone: (951) 827-3524<tel:%28951%29%20827-3524> Facsimile: (951) 827-4286<tel:%28951%29%20827-4286> (not confidential) Email: tgarl...@ucr.edu<mailto:tgarl...@ucr.edu> http://www.biology.ucr.edu/people/faculty/Garland.html http://scholar.google.com/citations?hl=en&user=iSSbrhwAAAAJ Director, UCR Institute for the Development of <http://idea.ucr.edu/> Educational Applications<http://idea.ucr.edu/> Editor in Chief, Physiological and Biochemical Zoology<http://www.press.uchicago.edu/ucp/journals/journal/pbz.html> Fail Lab: Episode One http://testtube.com/faillab/zoochosis-episode-one-evolution http://www.youtube.com/watch?v=c0msBWyTzU0 On Wed, Nov 30, 2016 at 8:50 AM, Menzel, Dr. Florian <menz...@uni-mainz.de<mailto:menz...@uni-mainz.de>> wrote: Dear all, I am analysing phylogenetic signal using Blomberg's K. For several of my traits (univariate, continuous), the signal strongly deviates both from random and from the Brownian Motion. I am unsure how to interpret this. Can you give me some advice what this could mean? Thanks a lot! Florian Dr. Florian Menzel Department of Evolutionary Biology, Institute of Zoology University of Mainz Johannes-von-M�ller-Weg 6 55128 Mainz, Germany phone: 0049-6131-3927848 http://www.bio.uni-mainz.de/zoo/evobio/73_ENG_HTML.php Gemeinsam einen Unterschied machen! www.synagieren.de<http://www.synagieren.de><http://www.synagieren.de> 'For every complex problem there is an answer that is clear, simple, and wrong.' (Henry Louis Mencken) [[alternative HTML version deleted]] _______________________________________________ R-sig-phylo mailing list - R-sig-phylo@r-project.org<mailto:R-sig-phylo@r-project.org> https://stat.ethz.ch/mailman/listinfo/r-sig-phylo Searchable archive at http://www.mail-archive.com/r-sig-phylo@r-project.org/ [[alternative HTML version deleted]]
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