[R-sig-eco] repeated measures ANOVA and PERMANOVA (does it exist?)

[Steve Brewer]

David,

Assuming the distance/similarity measure is non-euclidean (e.g., Bray-Curtis), see attached pdf document containing a previous post on this subject. This approach is based on the one that Marti Anderson describes in Primer.

Good luck,
Steve


Stephen Brewer
jbrewer at olemiss.edu<mailto:jbrewer at olemiss.edu>
Professor
Department of Biology
PO Box 1848
 University of Mississippi
University, Mississippi 38677-1848
 Brewer web page - https://jstephenbrewer.wordpress.com
FAX - 662-915-5144 Phone - 662-202-5877





On Jan 23, 2018, at 3:33 PM, David Barfknecht <dfbarfknecht at outlook.com<mailto:dfbarfknecht at outlook.com>> wrote:

Hello all,

I am currently working on a project that uses species occurrence data (0/1) to construct an NMDS ordination where some points are the same location but through time (10 locations X 3 survey times = 30 observations). I want to use ANOSIM and PERMANOVA to look at both individual locations controlling for time and all survey periods controlling for location. Basically, I want to look at location and times as separate factors.  I am curious if anyone have ever had to write a script for repeated measures ANOSIM and/or PERMANOVA. I am aware of how to do the unrepeated measures version of these in the vegan package, but not repeated measures versions. Any suggestions?

If not, are there other methods more appropriate to investigate this?

Thank you in advance for any advice.

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10


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