Hello,

I want to do an unconstrained ordination to look at my plant community data
but don't know how to account for the fact I have multiple visits per site.
 Do I need to look at each month separately?
My data set is of 30 field sites that I visited 5 times in the year and the
abundance of each plant species is in each column;

site    month    species a    species b     species c ...etc
1       may         1                   0             7
1       june         5                   0             9
1       july          2                   8             0
1       aug         12                  6             0
1       sept        14                  5             0

2        may
2        etc

(I have additional environmental data for later analyses)

Also, is there much difference between analysis in Canoco and R?

Thanks
Cathy

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