[R-sig-eco] biplot with most important species

[Bjorn]

Hi all,

there might be a simple solution to do this, but I don't seem to manage 
to find it. I have done a PCA using vegan. I now want to create a biplot 
with only those species that explain a certain (cumulative) amount of 
the variation along the first 2 PC axes (in order to keep things clear). 
How could this be done?

Thanks in advance!

Kind regards,

Bjorn