Hello,

I have a simple BACI design with four plots exposed to herbivory and four
without herbivores.  I quantified the densities of nematode trophic groups
before and after manipulating herbivory.  So there is one treatment factor
(+/- herbivory) and a time variable (before/after), and the data are
balanced.
Here is a sample of my data:

Plot Time Treatment   BF        FF         PP        Om

1    A      Cont 17.211259 2.0320259 11.1151816 3.9218100

2    A      Cont 26.991283 5.1102956 10.0989175 2.8187742

3    A        GH  6.295530 0.6860513  2.0985099 1.9169081


Since I want to see whether herbivory affects how nematode communities
change, I'm interested in the herbivory * time interaction.

I've tried to analyze a Bray-Curtis dissimilarity matrix of my nematode
data using the following code:

adonis(nema.troph.bc~Treatment*Time,data=nema,permutations=999)


Although this returns an interaction (and main effects), it ignores the
repeated measures aspect of my design.  How do I incorporate this into
adonis() or another function.


Thanks,



Keith

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