Cluster analysis and multidimensional scaling are used to revise the syntaxonomy of the Fagion illyricum alliance based on presence/absence data. The operational syntaxonomical units are associations and subassociations as suggested in the literature. The results of principal coordinates analysis and nonmetric multidimensional scaling are fairly congruent, whereas some differences occur between the dendrograms obtained by complete linkage and incremental sum of squares clustering. However, a joint evaluation of ordinations and the consensus classification derived from the cluster analysis results facilitates a meaningful revision of the formerly accepted division of the alliance. New low-level syntaxa, and some new names, including Aremonio-Fagion to replace the invalid alliance name of Fagion illyricum, are proposed and the removal of four associations from the alliance is suggested.
ASJC Scopus subject areas
- Plant Science