[R-sig-eco] variance explained for PCoA axes

[Mario Beolco]

Dear R users,

I was wondering whether it is possible to obtain a measure of the
variance explained for each axis of a PCoA performed using cmdscale?
The function add.spec.scores
<http://rss.acs.unt.edu/Rdoc/library/BiodiversityR/html/add.spec.scores.html>,
that comes with the BiodiversityR package, should in theory do what I
want, but I have not found any reference to the method in the package
manual. Any help would be greatly appreciated!

thanks!

Mario