Is there a way to do this in spss?

I have 12 species within 2 functional groups. There are five treatments applied to each species for five reps.

Looking at plant biomass, 3 measures.

I want to know if the treatments have any effects - on species, on functional groups. How do I account for any effect on the species in functional group 1 vs functional group 2, this is where I think the nestedness comes in.