I am considering using PERMANOVA (vegan: adonis) and Multivariate Analysis of Dispersion (DISPER; vegan: betadisper) to test whether differences in soil chemical composition occur between two stand types. My reasoning for using these techniques rather than parametric MANOVA is that, if PERMANOVA shows differences between stands, I would like to know if those differences are driven (at least partly) by variability of soil characteristics between groups, using DISPER. My idea is to center and scale the soils data (they vary in units of measure) and then just proceed with functions adonis and betadisper in vegan using euclidiean distances.
Does this sound like an appropriate course of action? **************************************** Chris Habeck Remnant Expansion Project Postdoctoral Research Associate Department of Plant Biology Michigan State University Website: http://habeck-ecology.weebly.com/index.html [[alternative HTML version deleted]] _______________________________________________ R-sig-ecology mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
