Hi, I have calculated mantel statistics for three plant species to check for isolation by distance (thus, comparing genetic distance to geographic distance). Now, I would like to test whether the species have significantly different isolation by distance behaviour. Is there a R-function that allows me to do this? Cheers and thank for any comments Patrick -- Patrick Kuss PhD-student Institute of Botany University of Basel Sch?nbeinstr. 6 CH-4056 Basel +41 61 267 2976