[Sigbioinform-l] Naive question

[Bill Bell]

I hope no-one will mind my posting this here. I am just attempting to satisfy my own curiosity. 

What kinds of taxonomies are available that categorise the various niches that biological  
species occupy? For example, there is a South American rodent that occupies a niche similar 
to that occupied by antelope, and the kiwi occupies a niche that is occupied by mammals in 
many habitats outside New Zealand. Species that occupy each of these niches would be 
classified  together in the taxonomy. 

Would anyone mind suggesting links that I can follow to read more? 

In any case, thank you! 

Bill