[R] Confusion metaMDS and CA

[swertie]

Hello, I read a lot about ordination, but I am still confused... I have data
on species presence/absence for 8 different sites and I would like to
represent my species and the sites on an ordination plot to see if some
species are associated with specific sites. I used metaMDS function, which
displays both sites and species and it seems to work well. However why are
most people using CA instead of non metric multidimensional scaling? Thank
you  
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