relate environmental parameters to OTU network

Hi all,

I've made a network of OTUs using phyloseq. Now, I'd like to correlate 
environmental variables to the clusters I observed. Anybody here who has 
an idea on how to do this exactly? Perhaps there are multiple ways, or 
if it is possible using another package (network, sna, ...), please let 
me know.


Thanks in advance.

Kind regards,
Bjorn