Dear Ted,

yes - I have a trait with K = 0.041. It differs significantly from random 
expectation (p = 0.001, command phylosig, package phylosig and command 
phylosignal, package picante). But it also differs from the Brownian motion 
model (p = 0.001, simulated with brownie.lite and fastBM). I obtained similar 
results for other traits, too.


Does this mean that the trait has less phylogenetic signal than expected under 
Brownian motion, but more than expected from random, or does that mean that 
closely related species are even more different than expected from random (i.e. 
'negative' phylogenetic signal)? I am not sure how to interpret these results...


Thanks a lot for your help!


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

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________________________________
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


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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)

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