a b s t r a c t Global warming is creating the need to incorporate a considerable amount of knowledge on diversity and functionality into management plans, but this is not always an easy task. We have developed an approach that includes the analysis of biodiversity measures and their relation with physiographic or soil parameters, for use in forestry management plans in Hoyocasero (central Spain). Considering the richness in forest plants and according to their morphological and functional traits, we grouped the species present under the canopy into four groups. Then we have calculated their richness and biodiversity indices and for the set of plants as a whole. The species groups showed differences in richness and diversity indices for the two forest types in the study, while the set of plants as a whole was not sensitive enough to detect variations in the quality of the floristic species. The use of diversity indices applied to particular species groups proved to be a useful method of defining levels of forest quality. This methodology has enabled us to establish that the pinewood is in a better state of conservation than the oakwood.