[R-sig-eco] pairwise comparison of rank dissimilarities for factor levels - pairwise ANOSIM

[Ralf Schäfer]

Hello,

I have a question and would be grateful for any help:

Is there a possibility (in the sense that I do not have to write my  
own function) to compute pairwise comparisons for factor levels  
concerning their rank dissimilarities?
I have a distance matrix and want to assess if there are significant  
differences between the ranked distances of different ecological  
groups (pollution categories).  I found the anosim, adonis and mrpp  
function in the vegan package for testing if there is a general  
difference between and among group rank similarities but I did not  
figure out which group levels are significantly different from each  
other in multiple comparison.
In Primer there is something like pariwise ANOSIM to do this.

Thanks in advance!
Ralf

------------------------------------------------------------

Dr. Ralf Bernhard Schäfer
Biotechnology and Environmental Biology
School of Applied Sciences
RMIT University
PO Box 71
3083 Bundoora, VIC
Australia

Mail: Ralf.Schaefer at rmit.edu.au
Phone: ++61 (0)3 99257105
Web: http://www.rmit.edu.au/staff/ralf-schaefer