摘要: The utility of biodiversity measures that incorporate pairwise species functional differences is becoming increasingly recognized. Functional diversity regarded as the key for linking community composition to ecosystem processes like productivity, nutrient cycling, carbon sequestration, or stability when subject perturbations. Therefore, several indices have been proposed measure a given assemblage. principle behind these assemblage with high overlap among has lower than an low overlap. On other hand, variability in characters different assemblages (i.e., beta diversity) received much less attention. aim this paper thus discuss general framework calculating from plot-to-plot dissimilarity matrices. To illustrate our proposal we use data two beech forest stands management histories central Italy. results analysis shows that, though are significantly one another terms their traits, difference values only marginally significant. These related characteristic scale at which ecological variations occur stands.