[R] BIO-ENV procedure

[Peter Nelson]

I've been unable to find a R package that provides the means of 
performing Clarke & Ainsworth's BIO-ENV procedure or something 
comparable. Briefly, they describe a method for comparing two separate 
sample ordinations, one from species data and the second from 
environmental data. The analysis includes selection of the 'best' 
subset of environmental variables for explaining the observed spp 
ordination.  Is there something available or being developed?

Thanks, Pete