Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Espagne → 2015 → Diversidad filogenética e interacciones entre plantas : consecuencias para la dinámica de comunidades vegetales

Universidad de Almeria (2015)

Diversidad filogenética e interacciones entre plantas : consecuencias para la dinámica de comunidades vegetales

Pistón Caballero, Nuria

Titre : Diversidad filogenética e interacciones entre plantas : consecuencias para la dinámica de comunidades vegetales

Auteur : Pistón Caballero, Nuria

Université de soutenance : Universidad de Almeria

Grade : Tesis Doctoral 2015

Résumé
Plant-plant interactions are a major mechanism governing plant communities and their responses to environmental changes. However, it remains unclear how phylogenetic similarity affects interactions and how they influence the resulting community structure. Thus, our aim with this Thesis was to clarify fundamental aspects of plant interaction, their dependence on phylogenetic similarity, and the consequences for the dynamics of communities. We wanted to test i) whether there are complementary effects of foundation species increasing species richness and phylogenetic diversity ; ii) if phylogenetic similarity among species influences plant interactions ; iii) how these interactions change along an environmental severity gradient ; iv) whether phenotypic variability in a foundation species modulates species richness and phylogenetic diversity, and whether it affects facilitation costs ; and finally, under homogeneous environmental conditions, v) we expect ontogenetic shifts towards more negative species interactions for closely related species and towards less negative interactions for distantly related species. For these purposes we made various observations and experiments in the field supported by a series of physiological and functional analyses of plant communities.

Présentation (CSIC)

Version intégrale (3,91 Mb)

Page publiée le 15 novembre 2015, mise à jour le 5 février 2019