windows()
coldiss(spe.db, byrank=FALSE, diag=TRUE) # Heat map of Bray-Curtis dissimilarity
windows()
coldiss(spe.dj, byrank=FALSE, diag=TRUE) # Heat map of Jaccard dissimilarity
windows() 
coldiss(spe.dg, byrank=FALSE, diag=TRUE) # Heat map of Gower dissimilarity